title: An unusual case of sporotrichoid nodules: metastatic cutaneous squamous cell carcinoma.
abstract: A 63-year-old immunocompetent patient presented with a 4 month history of 12 painless nodules in a linear array on his right arm. He had a history of a surgery for a cutaneous tumor on the dorsum of his right middle finger about a year prior, but he did not follow up after the surgery. A differential diagnosis of sporotrichosis, atypical mycobacteria, deep fungal infection, and metastatic cutaneous squamous cell carcinoma (SCC) was considered. Skin biopsy revealed islands of dysplastic squamous cells and keratin pearls in a desmoplastic stroma in the deep dermis and subcutaneous tissue. The behavior of the disease was very aggressive, with rapid dissemination in a linear array, mimicking an infectious sporotrichoid spread. To our knowledge, this is the second case report of sporotrichoid metastases to the skin from cutaneous SCC in an immunocompetent patient.
authors.affiliation: Istanbul Education and Research Hospital, Department of Dermatology, Turkey. nskutlu@yahoo.com
authors.forename: Nurdan S Kutlu
authors.initials: NS
authors.lastname: Haytoglu
authors.forename: Mehmet S
authors.initials: MS
authors.lastname: Gurel
authors.forename: Vefa A
authors.initials: VA
authors.lastname: Erdemir
authors.forename: Cem
authors.initials: C
authors.lastname: Leblebici
authors.forename: Tahir G
authors.initials: TG
authors.lastname: Haytoglu
mesh_terms: D001132:Arm / Q000473:pathology*; D001706:Biopsy; D002294:Carcinoma, Squamous Cell / Q000175:diagnosis / Q000556:secondary* / Q000601:surgery; D003937:Diagnosis, Differential; D018450:Disease Progression; D005385:Fingers / Q000473:pathology / Q000601:surgery; D006801:Humans; D007121:Immunocompetence; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D012878:Skin Neoplasms / Q000175:diagnosis / Q000556:secondary* / Q000601:surgery; D013174:Sporotrichosis / Q000175:diagnosis