title: Gouty tophi on the ear: a review.
abstract: Although the classic location of gouty tophi is the great toe (podagra), gouty tophi of the ear also is common and is worth including in the differential diagnosis in patients presenting with ear lesions. Other entities presenting as papules or nodules on the ear include chondrodermatitis nodularis helicis (CNH), actinic keratosis, basal cell carcinoma, squamous cell carcinoma, verruca vulgaris, amyloids, rheumatoid nodules, and elastotic nodules. If tophaceous gout is suspected, alcohol fixation of the biopsy specimen is preferable, as it enables visualization of characteristic needle-shaped urate crystals.
authors.affiliation: Midlands Clinic, 705 N Sioux Point Rd, Dakota Dunes, SD 57049, USA. dr.indychabra@skinmdnow.com.
authors.forename: Indy
authors.initials: I
authors.lastname: Chabra
authors.forename: Rajendra
authors.initials: R
authors.lastname: Singh
mesh_terms: D001706:Biopsy / Q000379:methods; D003937:Diagnosis, Differential; D004427:Ear Diseases / Q000175:diagnosis / Q000209:etiology / Q000473:pathology*; D004431:Ear, External / Q000473:pathology*; D000431:Ethanol / Q000737:chemistry; D006073:Gout / Q000175:diagnosis / Q000473:pathology*; D006801:Humans; D014527:Uric Acid / Q000032:analysis
chemical_list: D014527:Uric Acid; D000431:Ethanol