Pleomorphic adenoma in the eye almost always starts in the lacrimal gland, which is the tear-making gland that sits at the outer, upper corner of the eye ...

A pituitary adenoma is a growth that starts in the pituitary gland, a small hormone-making gland that sits behind your nose at the base of your brain. Most of ...

Pilomatrixoma is a benign (non-cancer) skin tumor that grows from the hair root cells that live deep in the skin. These special hair root cells are called hair ...

A solitary fibrous tumor (SFT) is a rare growth that starts from the body’s connective tissue (the “fibrous” framework that supports organs).It can grow in ...

Glomangiopericytoma is a rare, usually low-grade tumor that grows from perivascular (around-blood-vessel) muscle-like cells in the nasal cavity or nearby ...

Hemangiopericytoma/solitary fibrous tumor is a rare tumor that starts from cells around small blood vessels. Today, doctors usually call these tumors “solitary ...

Zimmerman’s tumor” is an older, informal name for hemangiopericytoma—a very vascular soft-tissue tumor that was first described as a growth made of ...

Phakomatous choristoma is a very rare, benign (non-cancerous) growth made of lens-like tissue that develops in the wrong place, most often at the inner, lower ...

An orbital schwannoma is a benign (non-cancerous) tumor that grows from Schwann cells. Schwann cells are the cells that wrap around small peripheral nerves ...

An orbital plasmacytoma is a mass of abnormal plasma cells that grows in or around the eye socket (the orbit). Plasma cells are white blood cells that normally ...

Orbital pheochromocytoma is an extremely rare tumor that shows up in the eye socket (the “orbit”). Most pheochromocytomas start inside the adrenal glands and ...

An orbital neurofibroma is a benign (non-cancerous) tumor that grows from the sheath of a nerve inside the orbit, which is the bony socket that holds the eye. ...

Mesenchymal chondrosarcoma is a very rare, fast-growing cancer that forms cartilage-like tissue. “Mesenchymal” means it starts from primitive, early ...

Orbital meningiomas are growths that start from the thin covering layers around the brain and the optic nerve. These covering layers are called the meninges. ...

Orbital lymphoma is a cancer of the immune system that grows in or around the eye. The “orbit” is the bony space that holds the eyeball, the muscles that move ...

An orbital lymphangioma is a mass made of abnormal lymphatic channels inside the eye socket (the orbit) and sometimes the eyelids. Doctors now prefer the term ...

An orbital lipodermoid (also called a dermolipoma) is a benign, non-cancerous lump made of normal fat and skin-type tissue that grew in the wrong place near ...

An orbital granular cell tumor is a rare growth that starts from the support cells that wrap around nerves (called Schwann cells) and develops inside the eye ...

Orbital chloroma is a solid tumor made of immature white blood cells (myeloid blasts) that grows inside the eye socket (the orbit). Doctors also call it ...

Optic nerve sheath meningioma is a slow-growing, usually benign (non-cancerous) tumor that starts in the thin lining (the meninges) that wraps around the optic ...