Sweat gland neoplasms

Chapter 5


Sweat gland neoplasms



Blue sweat gland tumors differentiate towards the secretory portion of the sweat gland. Red sweat gland tumors differentiate towards the sweat duct. Sweat duct tumors often demonstrate clear cell change. Most sweat gland tumors can show at least focal decapitation secretion, suggesting they are capable of apocrine differentiation.




Spiradenoma



Spiradenomas and cylindromas are closely related tumors. Both differentiate towards the secretory portion of the sweat gland. Hybrid tumors occur. Spiradenomas are usually sporadic and solitary, while cylindromas are multiple, inherited, and may occur together with trichoepitheliomas. Spiradenomas are inflamed (lymphocytes) and spontaneously tender.











Syringoma



Syrinx refers to a pipe or duct. Syringomas usually appear as small papules on the eyelids. They are especially common in Asian women and in children with Down’s syndrome. Eruptive syringomas typically occur on the chest, back, or penis of a dark-skinned patient. Eruptive syringomas appear as small hyperpigmented papules with no tendency to coalesce.




Apr 26, 2016 | Posted by in Dermatology | Comments Off on Sweat gland neoplasms
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