NCIt definition : A very rare carcinoma that arises from the sweat glands. It is characterized by mutations
and rearrangement of the NUT gene. It presents as a papular or nodular skin lesion
and has been described in the hand, shoulder, trunk, and lower limb. Histologically,
there is a proliferation of malignant epithelial cells in the dermis and/or subcutaneous
tissue. The tumor cells display round nuclei with prominent single nucleoli. Features
include the presence of small round ducts and foci of abrupt keratinization.;