Cancerous<unk> s are exceedingly rare. Criteria for the diagnosis of malignancy in<unk> s are: # Tumor size of more than 2 centimeters and subfascial or visceral location. # Atypical mitotic figures. # Marked nuclear atypia and any level of mitotic activity. #* Pericytes of Zimmerman Cancerous<unk> s have been subdivided into three categories based on their histologic appearance: locally infiltrative<unk> s (LIGT), glomangiosarcomas arising in benign<unk> s (GABG), and glomangiosarcomas arising de novo (GADN). A few cases of cancerous<unk> s have been reported; however, they are usually only locally invasive, and metastases are exceedingly rare. There is one report of widespread metastases of a malignant<unk>  involving the skin, lungs, jejunum, liver, spleen, and lymph nodes. Another report of a malignant<unk>  (glomangiosarcoma) with metastases from the skin. A malignant<unk>  one arose from the kidneys. Differential The probable misdiagnosis of many of these lesions as hemangiomas or venous malformations also makes an accurate assessment of incidence difficult.
Glomus tumor
Gastrinoma
Pineocytoma
Gangliocytic paraganglioma
Brown tumor
Melanocytoma
Granular cell tumor
Ganglioneuroma