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They usually occur just under the skin, but occasionally may be deeper. [1] Most are less than 5 cm (2.0 in) in size. [2] Common locations include upper back, shoulders, and abdomen. [4] It is possible to have several lipomas. [3] The cause is generally unclear. [1] Risk factors include family history, obesity, and lack of exercise.
The arm of a patient with familial multiple lipomatosis. Familial multiple lipomatosis is a hereditary adipose tissue disorder that is characterized by the formation of multiple lipomas that occur in a particular distribution. [1] The lipomas are well-encapsulated, slow-growing, benign fatty tumors.
The cause is unknown. [3] The underlying mechanism is believed to involve an outpouching of the synovial membrane. [4] Diagnosis is typically based on examination. The ability to shine through the bump or any past decrease in size supports the diagnosis of the bump as a ganglion cyst. [4] Ganglion cysts are usually obvious upon observation.
Research from Sweden has found a link between getting a tattoo of any size and an overall 21% higher risk of developing lymphoma, a type of blood cancer. Tattoos may increase blood cancer risk by ...
Spider angiomas form due to failure of the sphincteric muscle surrounding a cutaneous arteriole. The central red dot is the dilated arteriole and the red "spider legs" are small capillaries carrying away the freely flowing blood. If momentary pressure is applied, it is possible to see the emptied capillaries refilling from the center.
The most accurate use of the term granuloma requires a pathologist to examine surgically removed and specially colored (stained) tissue under a microscope. Macrophages (specifically histiocytes) are the cells that define a granuloma. They often fuse to form multinucleated giant cells (Langhans giant cell). [7]
Nodules are small firm lumps usually greater than 1 cm in diameter, found in skin and other organs. [ 1 ] [ 2 ] If filled with fluid they are usually softer and referred to as cysts . [ 2 ] Smaller (less than 0.5 cm) raised soft tissue bumps may be termed papules .
Activation of trigger points may be caused by a number of factors, including acute or chronic muscle overload, activation by other trigger points (key/satellite, primary/secondary), disease, psychological distress (via muscle hypertonia), systemic inflammation, homeostatic imbalances, direct trauma to the region, collision trauma (such as a car crash which stresses many muscles and causes ...