Nuchal fibroma

Nuchal-type fibroma is a rare benign proliferation involving the dermis and subcutaneous tissues, that is a collection of dense, hypocellular bundles of collagen with entrapped adipocytes and increased numbers of small nerves.

[3] These lesions are generally asymptomatic, although patients give a long history of a solitary, superficial mass.

[1] By microscopic examination, there are haphazardly arranged thick collagen fibers, with a low cellularity and no pleomorphism.

[1] The differential diagnosis includes elastofibroma, fibrolipoma, desmoid-type fibromatoses, and nuchal fibrocartilaginous pseudotumor.

However, in patients with Gardner syndrome, up to 45% will develop desmoid-type fibromatosis at other sites, and so this should be searched for and excluded.