The word “tumor” can sound frightening, especially when it involves the brain. However, not all meningiomas are malignant, and many grow slowly and can be managed successfully through regular monitoring or appropriate treatment. One such type is Psammomatous Meningioma, which is characterized by the presence of tiny calcium deposits within the tumor tissue that resemble grains of sand.What is the nature of this tumor? What are the possible causes of its development? Can it cause serious symptoms? How is it diagnosed, and what treatment options are available, ranging from regular monitoring to surgery and radiation therapy? Is recovery possible, and can patients return to their normal daily activities?In this article from Dalili Medical, we will explore psammomatous meningioma, helping you understand its symptoms, diagnostic methods, and treatment options, along with important advice on managing the condition and recognizing the warning signs that require medical attention.Accurate knowledge is the first step toward making informed treatment decisions, free from fear and misinformation.

What Is Psammomatous Meningioma?

Psammomatous meningioma is a histological subtype of meningioma characterized by the presence of small, rounded calcium deposits known as “psammoma bodies” within the tumor tissue. It is often slow-growing and classified as Grade 1, the lowest-grade category. However, determining the tumor’s nature and level of risk depends on histopathological findings, as well as its characteristics and location.

Is Psammomatous Meningioma Benign or Malignant?

Psammomatous meningioma is usually classified as Grade 1 and is considered relatively low-risk. However, describing a tumor as “psammomatous” alone is not sufficient to establish its grade. Accurate grading may require a tissue sample to be examined and analyzed under a microscope.

Can Psammomatous Meningioma Become Malignant?

Transformation into a malignant tumor is not inevitable and is not a typical feature of low-grade meningiomas. Risk assessment depends on the tumor’s histological grade, growth pattern, and characteristics identified through medical examinations. Therefore, regular follow-up is important for detecting any potential changes.

Can Psammomatous Meningioma Be Completely Removed?

Yes, complete surgical removal is possible in many cases. However, its feasibility depends on the tumor’s size and location, as well as the extent to which it is attached to nearby blood vessels and nerves.

In some cases, the surgeon may decide to leave part of the tumor behind if complete removal could damage sensitive neurological structures. This approach helps protect the patient’s safety and reduce the risks associated with surgery.

Can Psammomatous Meningioma Return After Surgical Removal?

Yes, the tumor may recur after surgery. The likelihood of recurrence depends on its histological grade, the extent of surgical removal, its location, and its biological characteristics.

The risk of recurrence is generally lower when a Grade 1 tumor is completely removed, but it is not entirely eliminated. Therefore, regular follow-up with magnetic resonance imaging (MRI) remains essential according to the monitoring plan established by the treating physician.

Can Psammomatous Meningioma Grow Rapidly?

Most low-grade meningiomas grow slowly, but the growth rate varies from one patient to another. Comparing successive MRI scans is the best way to assess changes in tumor size over time.

Do Calcifications Make Surgical Removal More Difficult?

Calcifications may make certain parts of the tumor firmer, potentially increasing the difficulty of handling them during surgery. However, the difficulty of surgical removal depends more significantly on the tumor’s location and size, as well as the extent to which it is attached to nearby blood vessels and nerves.

Can Psammomatous Meningioma Affect Vision?

Yes, it may affect vision if it is located near the optic nerve or visual pathways. Pressure on these structures can lead to impaired vision.

The development of a new visual disturbance or a noticeable deterioration in vision requires urgent medical evaluation.

Can Psammomatous Meningioma Affect Hearing?

Yes, it may affect hearing if the tumor is located near the auditory nerve or the structures responsible for hearing and balance. However, this effect depends on the tumor’s location and is not a common symptom in all patients with meningiomas.

Can the Tumor Return Years After Surgery?

Yes, the tumor may recur years after surgery, particularly if complete removal was not possible or if the tumor had a higher histological grade. Therefore, the physician may recommend regular MRI scans for several years, depending on the tumor’s grade, the extent of its removal, and follow-up findings.

Can Psammomatous Meningioma Affect Pregnancy?

Some meningiomas may change in size or behavior during pregnancy. Hormonal changes, along with changes in fluid balance and blood circulation, may contribute to these changes. The effects vary from one case to another, and having a meningioma does not necessarily mean that pregnancy is impossible.

If you have a meningioma and are planning to become pregnant, it is best to consult a neurosurgeon and an obstetrician-gynecologist before conception. They can assess the tumor’s location, size, and symptoms and establish an appropriate monitoring plan for pregnancy.

What Are the Types of Psammomatous Meningioma?

Psammomatous meningioma is a histological subtype of meningioma characterized by the presence of small, round, concentric calcified structures known as psammoma bodies, which appear under a microscope like grains of sand.

To understand this subtype, it is important to distinguish between the histological types of meningiomas, their grades, and their anatomical locations, as each classification describes a different aspect of the tumor’s characteristics.

First: Histological Types of Meningioma

Doctors classify meningiomas into several histological types, including the following:

1. Meningothelial Meningioma: Composed of cells resembling normal meningeal cells and usually classified as Grade 1.

2. Fibrous Meningioma: Characterized by spindle-shaped cells and a fibrous appearance.

3. Transitional Meningioma: Combines the histological features of meningothelial and fibrous meningiomas.

4. Psammomatous Meningioma: Characterized by numerous psammoma bodies, which are round calcified deposits that form within the tumor. It is usually classified as Grade 1 under the World Health Organization (WHO) histological grading system.

5. Angiomatous Meningioma: Characterized by an abundance of blood vessels within the tumor.

6. Microcystic Meningioma: Contains small spaces resembling microscopic cysts.

7. Secretory Meningioma: Characterized by the production of secretory substances within tumor cells.

8. Metaplastic Meningioma: Exhibits differentiation changes resembling certain other tissue types.

9. Lymphoplasmacyte-Rich Meningioma: Characterized by large numbers of immune cells within the tumor tissue.

Note: Psammomatous meningioma is not necessarily a group of independent subtypes. Rather, it is a distinct histological pattern within the classification of meningiomas.

Second: Grades of Meningioma

The grade of a meningioma is determined by its histological characteristics and established classification criteria. It helps physicians assess the tumor’s behavior and likelihood of recurrence.

Grade	General Meaning
Grade 1	Generally less aggressive and slow-growing, with a relatively lower risk of recurrence.
Grade 2	Atypical tumors or tumors with specific features associated with a greater likelihood of growth or recurrence compared with Grade 1.
Grade 3	More aggressive malignant tumors that tend to grow and recur more frequently.

Psammomatous meningioma is usually classified as Grade 1. However, its grade cannot be determined with certainty based on its name alone; the complete histopathology report must be reviewed.

Third: Does Psammomatous Meningioma Differ Depending on Its Location?

Yes. Meningiomas may occur in different locations, including the surface of the brain, the skull base, or the spinal canal. The tumor’s location influences its potential symptoms and treatment options, but it does not constitute a separate histological subtype.

Therefore, when evaluating psammomatous meningioma, the physician considers its histological type, grade, location, size, and associated symptoms to determine the most appropriate treatment and follow-up plan.

Causes and Symptoms of Psammomatous Meningioma

Psammomatous meningioma is a histological subtype of meningioma, a tumor that develops from the membranes surrounding the brain and spinal cord. This subtype is characterized by small, round calcified deposits known as “psammoma bodies.” It is usually classified as Grade 1, meaning it is less aggressive and slow-growing. However, its behavior depends on its histological grade, location, and size.

First: What Causes Psammomatous Meningioma?

The exact cause of psammomatous meningioma has not yet been established. However, several factors are associated with an increased risk of developing meningiomas in general, including the following:

1. Genetic Changes: Changes may occur in the genetic material of meningeal cells, affecting the regulation of their growth and multiplication. Genes that may be associated with meningiomas include NF2, along with several other genes. These changes are usually acquired within the cells rather than inherited from parents.

2. Previous Exposure to Ionizing Radiation: Exposure to ionizing radiation, particularly radiation therapy to the head, is a recognized risk factor for developing meningiomas.

3. Hormonal Factors: Some meningiomas contain receptors for hormones such as progesterone, and certain tumors may be affected by hormonal changes. However, the specific role of hormones in the development of psammomatous meningioma remains uncertain.

4. Genetic Predisposition: In rare cases, meningiomas are associated with inherited disorders such as neurofibromatosis type 2 (NF2), which can increase the predisposition to developing multiple meningiomas.

Important: Having one of these risk factors does not necessarily mean that a person will develop a tumor. Many patients have no clear cause or identifiable risk factor.

Second: What Are the Symptoms of Psammomatous Meningioma?

Symptoms depend on the tumor’s location and size and the extent to which it presses on the brain, nerves, or spinal cord. A small tumor may cause no symptoms and may be discovered incidentally during an imaging examination performed for another reason.

1. Symptoms of an Intracranial Tumor

Possible symptoms include:

• Persistent or progressively worsening headaches.

• Blurred or double vision.

• Seizures.

• Weakness or numbness in an arm or leg.

• Difficulty with speech, concentration, or memory.

• Balance problems or difficulty walking.

• Changes in behavior or personality in some cases.

These symptoms do not necessarily indicate the presence of a meningioma. They may result from other medical conditions, and a medical evaluation is needed to determine the cause.

2. Symptoms of a Tumor Near the Optic Nerves or Visual Pathways

If the tumor presses on the optic nerve or the pathways responsible for vision, symptoms may include:

• Gradual deterioration in vision.

• Loss of part of the visual field.

• Difficulty seeing or distinguishing fine details.

The development of new or worsening visual impairment requires urgent medical evaluation.

3. Symptoms of a Tumor Surrounding the Spinal Cord

A meningioma in the spinal canal may cause symptoms that vary depending on the level of compression, including:

• Back or neck pain.

• Numbness or weakness in the limbs.

• Difficulty walking or balance disturbances.

• Loss of bladder or bowel control in severe cases.

Medical Warning: Sudden or progressive limb weakness, new difficulty walking, or loss of bladder or bowel control requires urgent medical evaluation, particularly when accompanied by back or neck pain.

Diagnosis and Risks of Psammomatous Meningioma

The diagnosis of psammomatous meningioma is based on clinical evaluation and imaging findings. However, confirming that a tumor is specifically of the psammomatous subtype usually requires microscopic examination of tissue. This subtype is characterized by round calcified deposits known as “psammoma bodies.”

First: How Is Psammomatous Meningioma Diagnosed?

1. Brain Magnetic Resonance Imaging (MRI)

MRI is one of the most important investigations for evaluating meningiomas. It helps determine the tumor’s location, size, and shape, as well as its effects on the brain, nerves, and surrounding tissues. A contrast agent may be used to improve image clarity, depending on the physician’s assessment.

2. Computed Tomography (CT)

CT scanning helps detect calcifications within the tumor and determine their extent. These calcifications may support suspicion of the psammomatous subtype, but they are not sufficient on their own to confirm the diagnosis.

3. Histopathological Examination of a Tissue Sample

If surgery is performed to remove the tumor or obtain a tissue sample, a pathologist examines the tissue under a microscope to identify calcified psammoma bodies and other characteristic features. This examination helps confirm the histological subtype and determine the tumor’s grade according to established criteria.

Not all meningiomas require an immediate biopsy. In some cases, the physician may recommend imaging surveillance instead, depending on the symptoms, tumor location, size, and characteristics.

Second: What Are the Risks of Psammomatous Meningioma?

The risks vary from one patient to another. They are not determined solely by the presence of calcifications but depend primarily on the tumor’s location, size, growth pattern, and effects on nearby tissues.

1. Pressure on the Brain or Nerves

Even a benign tumor may cause symptoms and complications if it grows or is located near sensitive structures. These may include:

• Persistent or worsening headaches.

• Blurred or double vision.

• Weakness or numbness in an arm or leg.

• Balance problems or difficulty walking.

• Seizures in some cases.

2. Increase in Tumor Size

The tumor may remain stable in size for long periods, while other tumors may gradually grow. Therefore, the physician may recommend periodic MRI scans to monitor its size and assess any changes over time.

3. Calcifications Within the Tumor

Calcifications are a characteristic feature of psammomatous meningioma, but their presence alone does not mean that the tumor is malignant or more dangerous. They must be interpreted alongside imaging results, histopathological findings, and other clinical features.

4. Risk of Recurrence After Surgery

The tumor may recur after surgical removal, particularly if some tumor tissue remains or if it has a higher grade. The likelihood of recurrence depends on the tumor’s grade, extent of removal, location, and histological characteristics. Therefore, long-term follow-up may be necessary.

Third: When Does the Tumor Become a Medical Emergency?

Seek emergency medical care if any of the following warning signs occur:

• A first-time seizure.

• A sudden, extremely severe headache.

• Sudden weakness or numbness on one side of the body.

• Sudden loss of vision or severe deterioration in vision.

• Sudden difficulty speaking or altered consciousness.

These symptoms do not necessarily mean that the tumor is responsible, but they may indicate a serious condition requiring immediate evaluation.

Medical Treatment for Psammomatous Meningioma

Treatment for psammomatous meningioma depends on the tumor’s size, location, growth pattern, and associated symptoms. It is important to understand that there is currently no approved medication routinely used to eliminate or completely dissolve a benign psammomatous meningioma. Therefore, the physician determines the appropriate treatment plan based on the patient’s condition and examination results.

First: Observation Without Medication

If the tumor is small, does not cause significant symptoms, and MRI scans show no substantial increase in size, the physician may recommend regular monitoring instead of immediate treatment.

Monitoring generally includes periodic MRI scans and assessments of symptoms and changes in tumor size. This approach may be appropriate for certain low-grade meningiomas, depending on the physician’s judgment.

Second: Medications Used to Relieve Symptoms

These medications do not eliminate the tumor itself but may help control some of its associated symptoms and complications.

• Pain Relievers: These may be used to relieve headaches, depending on the physician’s assessment and the suitability of the medication for the patient.

• Antiseizure Medications: The physician may prescribe these if seizures associated with the tumor occur. They are not routinely used as preventive treatment in all patients who have never experienced seizures, unless specific medical circumstances warrant their use.

• Corticosteroids: The physician may prescribe medications such as dexamethasone for a limited period if swelling around the tumor causes symptoms. These medications help reduce edema but do not treat the tumor itself. They must be used under medical supervision because of their potential side effects.

Third: Are Hormonal Medications or Targeted Therapies Available?

Several drug treatments are being investigated for meningiomas that grow or recur after surgery or radiation therapy. However, no hormonal treatment or targeted drug is currently established as a routinely approved treatment for benign psammomatous meningioma.

Certain specialized drug treatments may be considered in selected cases, particularly for advanced or recurrent tumors for which suitable surgical or radiation treatment options are unavailable. Treatment selection depends on the tumor’s characteristics, examination results, and available scientific evidence, and may involve participation in a clinical trial.

Fourth: What Happens If the Tumor Grows or Recurs After Treatment?

If examinations show that the tumor is increasing in size or has returned after surgery, the medical team may discuss other options, including:

1. Surgery: To remove the tumor or relieve pressure on the brain or nerves when this is appropriate and safe.

2. Radiation Therapy: This may be used in certain cases, depending on the tumor’s size, location, grade, and extent of surgical removal.

3. Specialized Drug Treatments: These may be considered in selected cases involving advanced or recurrent tumors when other options are limited. Their effectiveness varies, and they are not routine treatments for benign psammomatous meningioma.

Surgical Treatment of Psammomatous Meningioma

Psammomatous meningioma is a histological subtype of meningioma characterized by round calcified deposits resembling grains of sand. It is usually classified as Grade 1 under the World Health Organization (WHO) grading system. However, treatment decisions depend on the tumor’s size, location, grade, growth rate, and proximity to important blood vessels and nerves.

Not every psammomatous meningioma requires surgery. Regular MRI monitoring may be sufficient if the tumor is small, stable, and asymptomatic. However, if it grows, compresses the brain or nerves, or causes progressively worsening symptoms, the physician may recommend surgery or one of the available radiation treatment options, depending on the individual case.

First: Types of Surgery and Procedural Treatments

1. Open Surgical Tumor Removal (Craniotomy)

Craniotomy is one of the commonly used methods for removing intracranial meningiomas.

How Is It Performed?

The surgeon creates an opening in the skull to access the tumor, separates it from the surrounding tissues, and removes it completely if this is possible and safe. Once the procedure is complete, the bone flap is secured back in place, and the wound is closed in layers.

When Is It Used?

• When the tumor is large or compresses the brain.

• When neurological symptoms are associated with the tumor.

• When tumor removal and a tissue sample are needed to determine its histological type and grade.

What Are the Potential Risks?

Potential risks include bleeding, infection, seizures, and cerebrospinal fluid leakage, as well as possible injury to blood vessels or nerves, depending on the tumor’s location and the nature of the surgery.

2. Endoscopic Endonasal Surgery

This technique is used in selected cases of skull base tumors that can be safely accessed through the nasal passages.

How Is It Performed?

The surgeon inserts an endoscope and specialized surgical instruments through the nose to reach the tumor without requiring a conventional opening in the skull.

When Is It Used?

It may be suitable for certain tumors located in specific areas of the skull base. However, it is not appropriate for all meningiomas. Its suitability depends on the tumor’s location and its relationship to nearby blood vessels and nerves.

What Are the Potential Risks?

Potential risks include cerebrospinal fluid leakage, infection, bleeding, and possible injury to blood vessels or the optic nerves.

3. Keyhole Surgery

This technique involves accessing the tumor through a small opening in the skull using a microscope or endoscope and specialized surgical instruments.

When Is It Used?

It may be suitable for certain tumors whose size and location allow them to be accessed through a smaller surgical opening.

However, this technique is not appropriate for every case. Patient safety and the ability to remove the tumor safely remain more important than minimizing the size of the surgical opening.

4. Stereotactic Radiosurgery (Gamma Knife, CyberKnife, or LINAC)

Despite its name, stereotactic radiosurgery is not open surgery and generally does not require opening the skull. Instead, it uses precisely targeted radiation directed at the tumor.

How Is It Performed?

The tumor’s coordinates are determined using medical imaging, and a focused dose of radiation is directed at it to stop its growth or control it.

When Is It Used?

It may be suitable for certain small tumors, residual tumor tissue following surgery, or recurrent tumors. The choice of treatment depends on the tumor’s size and location and its proximity to the optic nerve and other sensitive structures.

What Are the Potential Risks?

Temporary swelling around the tumor may occur, or neurological symptoms may develop depending on its location. This technique does not usually remove the tumor immediately; instead, it aims to control its growth.

5. Fractionated Radiation Therapy

With this approach, radiation is delivered over several sessions rather than in a single session.

This option may be preferred for certain larger tumors or those located near nerves and other sensitive structures, when the medical team determines that dividing the radiation dose into multiple sessions is more appropriate.

Second: How Does Surgery Differ Depending on the Tumor’s Location?

A. Tumor Located on the Surface of the Brain

These tumors can often be accessed through a craniotomy. Complete removal may be possible if the tumor is away from important functional areas and is not attached to sensitive blood vessels or nerves.

B. Tumor Located at the Skull Base or Near the Optic Nerve

The surgical approach is selected according to the tumor’s precise location and its relationship to nerves and blood vessels. The surgeon may leave part of the tumor behind if complete removal would put vision or neurological functions at risk. Radiation therapy may be considered for the remaining tumor tissue when appropriate.

C. Tumor Surrounding the Spinal Cord

Surgery is usually performed through an appropriate opening in the vertebrae to access the tumor and relieve pressure on the spinal cord while preserving nerve function. The details of the procedure depend on the tumor’s level and extent.

In all cases, the goal is to remove as much of the tumor as possible while maintaining safety and preserving brain and nerve function, rather than achieving complete removal at the expense of the patient’s well-being.

Third: What Tests and Preparations Are Needed Before Surgery?

Preparation varies depending on the individual case and may include:

1. MRI With Contrast: To determine the tumor’s size, location, and relationship to surrounding tissues. If the tumor is in the spinal canal, spinal imaging may also be required.

2. Neurological Examination: To assess strength, sensation, balance, and other neurological functions.

3. Vision or Hearing Tests: If the tumor is located near the nerves or structures responsible for these functions.

4. Blood Tests and Anesthesia Assessment: To confirm the patient’s readiness for surgery and evaluate potential risks.

5. Blood Vessel Imaging or Preoperative Embolization: In selected cases, imaging of the blood vessels or blocking some of the vessels supplying the tumor may be considered when the tumor is highly vascular, based on the specialist team’s assessment.

Not every patient requires all these tests or procedures. The physician determines which are necessary based on the tumor’s location and characteristics.

Fourth: What Happens After Surgery?

After the procedure, the medical team monitors the patient’s neurological condition, wound healing, and any potential complications. Follow-up care may include:

• MRI to assess the extent of tumor removal and identify any remaining tissue.

• Sending the surgical specimen to a pathology laboratory to confirm the histological subtype and determine the tumor’s grade.

• Establishing a regular imaging follow-up plan based on the pathology results and extent of removal.

• Assessing whether additional treatment, such as radiation therapy, is appropriate.

How Long Does Recovery From Psammomatous Meningioma Take?

Recovery from psammomatous meningioma varies according to the type of treatment, tumor size and location, the patient’s general health, and the extent to which the brain or nerves were affected before treatment. Recovery from surgery also differs from the time needed to observe the effects of radiation therapy on the tumor.

First: Recovery Time According to Treatment Type

Treatment Type	Approximate Recovery Time
Craniotomy	Returning to light activities may take approximately 2–6 weeks, while more extensive recovery may take 6–12 weeks or longer.
Endoscopic Endonasal Surgery	Often several weeks, although recovery may take longer depending on the extent of surgery and complications such as cerebrospinal fluid leakage.
Spinal Meningioma Surgery	Several weeks to several months, depending on nerve function and the extent of any effects on movement and sensation.
Stereotactic Radiosurgery, Such as Gamma Knife	Many patients can return to their usual activities within a day or a few days, but the tumor’s response must be assessed through imaging over the following months.

These time frames are estimates, not guarantees. Recovery may take longer if the tumor is large, is located near areas responsible for movement, vision, or speech, or if complications develop after treatment.

Second: Stages of Recovery After Brain Surgery

• The First Few Days After Surgery: Consciousness, movement, vision, and neurological functions are monitored. Pain is managed, and potential complications are assessed.

• The First Two Weeks: The patient needs adequate rest and can gradually begin light walking, according to the medical team’s instructions.

• Weeks Two to Six: Activity levels can be increased gradually if wound healing and neurological recovery allow.

• Weeks Six to Twelve: Many patients may be able to resume most of their usual activities. However, returning to work, driving, or exercising must be considered individually and may require the physician’s approval.

Some patients may need physical therapy or neurological rehabilitation if movement, balance, or other functions have been affected.

Prevention and Management Tips for Psammomatous Meningioma

Psammomatous meningioma is a histological subtype of meningioma characterized by calcified deposits within the tumor. It is often low-grade and slow-growing, although its behavior varies from one case to another.

It is important to understand that no proven method can prevent this tumor or guarantee that its growth can be stopped through diet or vitamins. However, regular medical follow-up and healthy habits can support overall health and help detect changes early.

1. Attend Regular Medical Follow-Up Appointments

Make sure to undergo MRI scans at the intervals recommended by your neurosurgeon, even if you have no symptoms. The timing of these scans depends on the tumor’s size, grade, and growth rate, as well as whether you have undergone surgery or another treatment.

2. Avoid Taking Medications Without Medical Advice

Do not use corticosteroids, antiseizure medications, or hormonal treatments to treat the tumor without a prescription. If you are already taking a prescribed medication, do not stop it or change the dose without consulting your physician.

3. Engage in Appropriate Physical Activity

Walking and moderate exercise may help improve fitness and overall health if your condition allows. However, if you experience balance problems, seizures, or limb weakness, avoid activities that could expose you to falls or injuries until you have received a medical assessment.

4. Maintain a Regular Sleep Schedule and Monitor Symptoms

Get sufficient sleep and record any new changes in headaches, vision, movement, or memory. Recording when symptoms occur, their severity, and how they progress can provide useful information for your physician during follow-up appointments.

5. Follow a Balanced Diet

• Eat vegetables, fruits, and a variety of protein sources.

• Drink an adequate amount of water.

• Maintain a healthy weight and a balanced lifestyle.

• Do not rely on herbs, dietary supplements, or restrictive diets as treatments for the tumor; their effectiveness in stopping tumor growth has not been established.

It is also advisable to avoid unnecessary exposure to ionizing radiation without delaying medically necessary examinations. Previous radiation exposure is a recognized risk factor for meningiomas, but this does not mean that every medical exposure to radiation causes these tumors.

6. When Should You Seek Prompt Medical Attention?

Seek emergency medical care if you experience a first-time seizure, sudden weakness in a limb, a sudden and extremely severe headache, sudden loss of vision, or altered consciousness.

If you notice gradually worsening vision or walking difficulties, or persistent increases in headache severity, contact your physician without waiting for your next scheduled imaging appointment.