title: Unknown: a warm, painful nodule on the back.
abstract: A 67-year-old man presented with a complaint of a painful nodule on his back for approximately two months. On exam, a violaceous, firm, warm, indurated nodule measuring 3.5 x 2 cm was observed. Nine months prior to presentation, he was diagnosed with a moderately differentiated squamous cell carcinoma (SCC) of the left upper lobe (stage 1b), which was removed via video-assisted thoracoscopic wedge resection. Diagnosis of metastatic SCC secondary to traumatic seeding at a trocar port site was made. To our knowledge, this has not been previously described in the literature.
authors.affiliation: Section of Dermatology, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire, USA.
authors.forename: Joyce Imuwahen
authors.initials: JI
authors.lastname: Imahiyerobo-Ip
authors.forename: David
authors.initials: D
authors.lastname: Wartman
authors.forename: Jeoffrey
authors.initials: J
authors.lastname: Brennick
authors.forename: Michael Shane
authors.initials: MS
authors.lastname: Chapman
mesh_terms: D000368:Aged; D001415:Back / Q000473:pathology; D002294:Carcinoma, Squamous Cell / Q000175:diagnosis / Q000556:secondary* / Q000601:surgery; D006801:Humans; D008175:Lung Neoplasms / Q000473:pathology* / Q000601:surgery; D008297:Male; D009366:Neoplasm Seeding; D012878:Skin Neoplasms / Q000175:diagnosis / Q000556:secondary*; D013906:Thoracoscopy / Q000295:instrumentation