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The majority of glomus tumors are benign, but they can also show malignant features. [4] Glomus tumors were first described by Hoyer in 1877 while the first complete clinical description was given by Masson in 1924. [5] Histologically, glomus tumors are made up of an afferent arteriole, anastomotic vessel, and collecting venule. Glomus tumors ...
On the other hand, benign tumors stain more highly for actin and myosin, and malignant tumors stain more intensely for vimentin. [11] Studies conducted in the past have also revealed changes in the expression of Bcl-2 and p53 in comparison to benign glomus tumors. [3] [12]
A synovial sarcoma (also known as malignant synovioma [1]) is a rare form of cancer which occurs primarily in the extremities of the arms or legs, often in proximity to joint capsules and tendon sheaths. [2] It is a type of soft-tissue sarcoma.
Epithelioid sarcoma is a slow-growing and relatively painless tumor, often resulting in a lengthy period of time between presentation and diagnosis. [8] Due to the difficulty of discerning this cancer as different from more common cancers, such as cancers of the skin (squamous cell carcinoma or basal cell carcinoma), it is often misdiagnosed, mistaken as a persistent wart or cyst.
A bone tumor is an abnormal growth of tissue in bone, traditionally classified as noncancerous (benign) or cancerous (malignant). [1] [4] Cancerous bone tumors usually originate from a cancer in another part of the body such as from lung, breast, thyroid, kidney and prostate. [1]
Melanoma tumors tend to be black or brown, but can sometimes be pink, tan or white. Anyone can get melanoma, but people with light skin are at greater risk. Causes of melanoma
The only reliable way to determine whether a soft-tissue tumor is benign or malignant is through a biopsy. The two methods for acquisition of tumor tissue for cytopathological analysis are: Needle aspiration biopsy, via needle; Surgically, via an incision made into the tumor; A pathologist examines the tissue under a microscope.
The tumor may be in the form of a hard plaque or a papule, often with an opalescent quality, with tiny blood vessels; The tumor can lie below the level of the surrounding skin, and eventually ulcerates and invades the underlying tissue; The tumor commonly presents on sun-exposed areas (e.g. back of the hand, scalp, lip, and superior surface of ...