Solitary fibrous tumor/hemangiopericytoma is a rare type of tumor that can occur in any part of the body. It is usually found in the pleura (the lining of the lungs and chest cavity) but can also occur in other parts of the body such as the abdomen, neck, and head. It is composed of spindle-shaped cells that produce collagen and other proteins. It is usually benign, but can sometimes be malignant. Treatment usually involves surgical removal of the tumor.

The most common symptom of a solitary fibrous tumor/hemangiopericytoma is a painless, slow-growing mass or lump in the chest, abdomen, or other parts of the body. Other symptoms may include:

• Abdominal pain

• Difficulty breathing

• Coughing up blood

• Unexplained weight loss

• Fatigue

• Fever

• Night sweats

• Swelling of the affected area

• Loss of appetite

• Nausea and vomiting

• Difficulty swallowing

• Hoarseness or changes in the voice

The exact cause of solitary fibrous tumor/hemangiopericytoma is unknown. However, some research suggests that it may be related to genetic mutations or changes in certain genes. It is also possible that environmental factors, such as exposure to certain chemicals or radiation, may play a role in the development of this type of tumor.

The primary treatment for a solitary fibrous tumor/hemangiopericytoma is surgical removal. Depending on the size and location of the tumor, this may be done through open surgery or laparoscopy. Radiation therapy may be used to treat tumors that cannot be completely removed surgically. In some cases, chemotherapy may be used to shrink the tumor before surgery.

1. Age: Solitary fibrous tumor/hemangiopericytoma is more common in adults between the ages of 40 and 70.

2. Gender: Solitary fibrous tumor/hemangiopericytoma is more common in males than females.

3. Smoking: Smoking has been linked to an increased risk of developing solitary fibrous tumor/hemangiopericytoma.

4. Exposure to radiation: Exposure to radiation has been linked to an increased risk of developing solitary fibrous tumor/hemangiopericytoma.

5. Genetic predisposition: Certain genetic mutations have been linked to an increased risk of developing solitary fibrous tumor/hemangiopericytoma.

There is no known cure for solitary fibrous tumor/hemangiopericytoma. Treatment typically involves surgery to remove the tumor, followed by radiation therapy and/or chemotherapy. In some cases, medications such as interferon or bevacizumab may be used to help slow the growth of the tumor.