title: Pilomatrixoma of the breast, a rare lesion simulating breast cancer: a case report.
abstract: Pilomatrixoma or calcifying epithelioma of Malherbe is a rare, benign, skin tumour originating from piliferous follicles; breast localization is considered to be very rare. These lesions can origin from the peri-areolar piliferous bulbs and, due to the clinical and imaging features, be easily misdiagnosed as a breast neoplasm. We present a case of pilomatrixoma of the left breast in a woman of 43 years appearing as a firm, deep nodule in the external quadrants. The lesion had mammographic and sonographic malignant features, but histological analysis on core-needle biopsy and surgical specimens revealed this unusual benign lesion.
authors.affiliation: Diagnostic Senology Unit Department of Radiology, Careggi University Hospital of Florence, Florence, Italy.
authors.forename: Jacopo
authors.initials: J
authors.lastname: Nori
authors.affiliation: Diagnostic Senology Unit Department of Radiology, Careggi University Hospital of Florence, Florence, Italy.
authors.forename: Dalmar
authors.initials: D
authors.lastname: Abdulcadir
authors.affiliation: Diagnostic Senology Unit Department of Radiology, Careggi University Hospital of Florence, Florence, Italy.
authors.forename: Elisabetta
authors.initials: E
authors.lastname: Giannotti
authors.affiliation: National Institute for Cancer Research Largo R, Genova, Italy.
authors.forename: Massimo
authors.initials: M
authors.lastname: Calabrese
mesh_terms: D000328:Adult; D001707:Biopsy, Needle; D001943:Breast Neoplasms / Q000473:pathology*; D003937:Diagnosis, Differential; D005260:Female; D006201:Hair Diseases / Q000473:pathology*; D006801:Humans; D008327:Mammography; D018296:Pilomatrixoma / Q000473:pathology*; D012878:Skin Neoplasms / Q000473:pathology*
keywords: breast; breast calcified nodules; breast pilomatrixoma; core needle biopsy