title: Variants of dermatofibroma--a histopathological study.
abstract: Several variants of dermatofibroma have been described. They are essentially distinguished by their clinical and histopathological features. To review the mainfeaturesof these variants, a retrospective study of skin biopsies and tissue excisions of dermatofibromasperformed in the dermatology and venereology service at the Hospital Garcia de Orta between May 2007 and April 2012 was carried out. During that period, 192 dermatofibromas were diagnosed in 181 patients, the lesions being more common in women. Median age of the study population was 48 years. The most common lesion site was the limbs (74% of patients). The histopathological types found were common fibrous histiocytoma (80%) and the aneurysmal (5.7%),hemosiderotic (5.7%), epithelioid (2.6%), cellular (2.1%), lipidized (2.1%), atrophic (1.0) and clear cell (0.5%) variants. Based on these findings, this review focuses on the clinical and histological features of the various variants of dermatofibroma in terms of their clinical presentation, distinct histopathological features, differential diagnosis and prognosis.
authors.affiliation: Hospital Garcia de Orta, Almada, Portugal.
authors.forename: João Vítor Pina
authors.initials: JV
authors.lastname: Alves
authors.affiliation: Hospital Garcia de Orta, Almada, Portugal.
authors.forename: Diogo Miguel
authors.initials: DM
authors.lastname: Matos
authors.affiliation: Hospital Garcia de Orta, Almada, Portugal.
authors.forename: Hugo Frederico
authors.initials: HF
authors.lastname: Barreiros
authors.affiliation: Hospital Garcia de Orta, Almada, Portugal.
authors.forename: Elvira Augusta Felgueira Leonardo Fernandes
authors.initials: EA
authors.lastname: Bártolo
mesh_terms: D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D001706:Biopsy; D002648:Child; D003937:Diagnosis, Differential; D005260:Female; D018219:Histiocytoma, Benign Fibrous / Q000473:pathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D017678:Sex Distribution; D012867:Skin / Q000473:pathology; D012878:Skin Neoplasms / Q000473:pathology*; D055815:Young Adult