title: Primary cutaneous CD30+ anaplastic large-cell lymphomas mimicking keratoacanthomas.
abstract: Primary cutaneous anaplastic large cell lymphoma (ALCL) may be associated with keratoacanthoma (KA)-like epithelial hyperplasia and dense eosinophilic and neutrophilic infiltrates. Diagnosis in such cases is challenging both clinically and histologically, because the large atypical lymphoid cells may be obscured by the massive infiltrate of eosinophils and neutrophils, or confused with invasive squamous cell carcinoma or KA. We recently encountered two cases of CD30+ ALCL presenting with a KA-like tumour on the eyelid and nose, respectively. One showed features of KA histologically, with marked tissue eosinophilia and neutrophilia.
authors.affiliation: Department of Dermatology, Hospital Clínico Universitario, Valencia, Spain. jmmart@eresmas.com
authors.forename: J M
authors.initials: JM
authors.lastname: Martín
authors.forename: J M
authors.initials: JM
authors.lastname: Ricart
authors.forename: C
authors.initials: C
authors.lastname: Monteagudo
authors.forename: J
authors.initials: J
authors.lastname: Alcácer
authors.forename: I
authors.initials: I
authors.lastname: Pinazo
authors.forename: L
authors.initials: L
authors.lastname: Tomás
authors.forename: N
authors.initials: N
authors.lastname: Rausell
authors.forename: E
authors.initials: E
authors.lastname: Jordá
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D005142:Eyelid Neoplasms / Q000175:diagnosis / Q000473:pathology; D005153:Facial Neoplasms / Q000175:diagnosis* / Q000473:pathology; D005260:Female; D006801:Humans; D007636:Keratoacanthoma / Q000175:diagnosis*; D054446:Lymphoma, Primary Cutaneous Anaplastic Large Cell / Q000175:diagnosis* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D009669:Nose Neoplasms / Q000175:diagnosis / Q000473:pathology; D012878:Skin Neoplasms / Q000175:diagnosis* / Q000473:pathology