Gingival Fibromatosis Elizabeth A. Montgomery, MD Key Facts Terminology Rare benign fibroproliferative disorder affecting gums, either idiopathic or familial ˜ 1/3 of cases are familial Virtually identical lesions reported in…

Inclusion Body Fibromatosis Thomas Mentzel, MD Key Facts Terminology Benign proliferation of fibroblasts and myofibroblasts containing scattered eosinophilic inclusion bodies that occur on digits of young children Clinical Issues Rare…

Sclerosing Fibroinflammatory Lesions Elizabeth A. Montgomery, MD Key Facts Terminology Group of poorly understood lesions unified by sclerosis and inflammation, with variable tumor formation and variable association with elevated serum…

Reactive Nodular Fibrous Pseudotumor of Mesentery Elizabeth A. Montgomery, MD Key Facts Terminology Lesion of mesentery composed of stellate and spindle-shaped cells arranged in collagen-rich stroma with lymphoid aggregates Clinical…

Calcifying Aponeurotic Fibroma Elizabeth A. Montgomery, MD Key Facts Terminology Lesion consisting of spindled fibroblasts, epithelioid mesenchymal cells, and chondroid foci ± mineralization Typically arises in hands and feet of…

Storiform Collagenoma David S. Cassarino, MD, PhD Key Facts Terminology Sclerotic fibroma Benign, dermal-based fibroblastic proliferation Microscopic Pathology Composed of thickened, hyalinized-appearing collagen bundles in storiform/whorled pattern Occasional cases may…

Fibroma of Tendon Sheath David R. Lucas, MD Key Facts Terminology Small benign fibrous nodule typically attached to tendon sheath Clinical Issues Most common in fingers Macroscopic Features Median size:…

Nuchal Fibrocartilaginous Pseudotumor Cyril Fisher, MD, DSc, FRCPath Key Facts Terminology Metaplastic (pseudoneoplastic) nodule of fibrocartilage originating within nuchal ligament Etiology/Pathogenesis Remote or recent history of neck trauma Clinical Issues…

Nuchal and Gardner Fibroma Elizabeth A. Montgomery, MD Key Facts Terminology Uncommon fibrocollagenous lesion classically arising in cervicodorsal region Some cases linked to familial adenomatous polyposis (FAP)/Gardner syndrome Clinical Issues…

Elastofibroma Cyril Fisher, MD, DSc, FRCPath Key Facts Terminology Pseudotumor composed of fragmented abnormal elastic fibers in collagenous stroma Etiology/Pathogenesis Probably related to trauma or friction Clinical Issues History of…