text: <unk>  body was first discovered by Wood, a Scottish surgeon, in 1812 in the Edinburgh Medical Journal. However,<unk>  was first correctly described in 1924 by Barre and Masson.<unk>  arises from modified smooth muscle cells (or pericytes) of the<unk>  body (previously called as<unk>  cells).<unk> s may be classified into solitary and multiple variants.  On gross pathology, they are small (usually less than 1 cm), bluish or whitish, well circumscribed, solitary nodules are characteristic findings of<unk> . On microscopic histopathological analysis, branching vascular channels and aggregates of specialized<unk>  cells are characteristic findings of<unk> . Multiple<unk> s are caused by a mutation in the GLMN <unk> in) gene. Solitary<unk> s must be differentiated from other diseases that cause pain such as leiomyoma and eccrine spiradenoma. Multiple<unk> s must be differentiated from other diseases such as cavernous hemangioma and blue rubber bleb nevus syndrome. Solitary<unk> s commonly affect young to middle aged individuals. Multiple<unk> s commonly affect children. Females are more commonly affected with solitary<unk> s (particularly subungual lesions) than males. Males are more commonly affected with multiple<unk> s than females. Common risk factors in the development of<unk> s are age and gender. If left untreated, patients with<unk> s may progress to develop pain and nail discoloration. Common complication of the<unk>  includes malignant change in multiple tumors. Common complications of<unk> s post operatively include nail deformities and recurrence. Findings on x rays suggestive of<unk>  may include a marginated bone erosion or thinning of the adjacent cortical bone. MRI and ultrasound may be helpful in the diagnosis of<unk> s. Surgery is the mainstay of treatment for<unk> . Prognosis is generally excellent for solitary<unk> s and malignant<unk> s treated with wide excision. However, the prognosis is poor for malignant<unk> s with widespread metastases.
option_0: Glomus tumor
option_1: Gastrinoma
option_2: Pineocytoma
option_3: Brown tumor
option_4: Granular cell tumor
option_5: Ganglioneuroma
option_6: Neuroma
option_7: Pheochromocytoma