Proliferative Fasciitis/Myositis Elizabeth A. Montgomery, MD Key Facts Terminology Tumefactive subcutaneous (fasciitis) or intramuscular (myositis) proliferation featuring ganglion-like fibroblasts Macroscopic Features Usually 2-3 cm Microscopic Pathology Mostly plump stellate to…
Desmoplastic Fibroblastoma Khin Thway, BSc, MBBS, FRCPath Key Facts Terminology Rare benign fibrous soft tissue neoplasm occurring mainly in adult males and consisting of paucicellular arrays of stellate and spindle…
Juvenile Hyaline Fibromatosis Elizabeth A. Montgomery, MD Cyril Fisher, MD, DSc, FRCPath Key Facts Terminology Related disorder: Infantile systemic hyalinosis (ISH) Clinical Issues Autosomal recessive transmission Infantile presentation of lesions…
Fibromatosis Colli Cyril Fisher, MD, DSc, FRCPath Key Facts Terminology Fibrosing lesion of infants involving muscles of head and neck Etiology/Pathogenesis Rarely familial Obstetric trauma has been proposed as causal…
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…
