title: Unusual breast lesion mimicking cancer: diabetic mastopathy.
abstract: Diabetic mastopathy represents an uncommon tumor-like proliferation of fibrous tissue of the breast that usually occurs in patients who suffered from type 1 diabetes mellitus for a long time. We report an uncommon case of diabetic mastopathy presenting in a type 2 non-insulin dependent diabetes mellitus 61-year-old postmenopausal woman. Physical examination revealed a hard, low movable mass in the upper outer quadrant of the right breast. Mammography and ultrasonography showed typical features of breast cancer. Ultrasound-guided fine-needle aspiration cytology (US-FNAC) was performed showing inflammatory infiltrate, suggesting excisional biopsy. Histological findings demonstrated typical diabetic mastopathy with fibrosis, histiocytic and limphocytic infiltration without evidence of malignancy.
authors.affiliation: Department of Gastroenterology, Endocrinology and Surgery, University Federico II of Naples, Naples, Italy.
authors.forename: Antonello
authors.initials: A
authors.lastname: Accurso
authors.affiliation: Department of Gastroenterology, Endocrinology and Surgery, University Federico II of Naples, Naples, Italy.
authors.forename: Giovanni Antonio
authors.initials: GA
authors.lastname: Della Corte
authors.affiliation: Department of Biomedical, Surgical and Dental Sciences, University of Milan, Via R. Galeazzi 4, 20161 Milan, Italy. Electronic address: nicola.rocco@unimi.it.
authors.forename: Nicola
authors.initials: N
authors.lastname: Rocco
authors.affiliation: Department of Advanced Biomedical Sciences - Section of Pathology, University Federico II of Naples, Italy.
authors.forename: Valeria
authors.initials: V
authors.lastname: Varone
authors.affiliation: Department of Advanced Biomedical Sciences - Section of Imaging, University Federico II of Naples, Italy.
authors.forename: Riccardo
authors.initials: R
authors.lastname: Buonaiuto
authors.affiliation: Department of Gastroenterology, Endocrinology and Surgery, University Federico II of Naples, Naples, Italy.
authors.forename: Rita
authors.initials: R
authors.lastname: Compagna
authors.affiliation: Department of Advanced Biomedical Sciences - Section of Imaging, University Federico II of Naples, Italy.
authors.forename: Daniele Ugo
authors.initials: DU
authors.lastname: Tari
authors.affiliation: Department of Gastroenterology, Endocrinology and Surgery, University Federico II of Naples, Naples, Italy.
authors.forename: Bruno
authors.initials: B
authors.lastname: Amato
authors.affiliation: Department of Advanced Biomedical Sciences - Section of Imaging, University Federico II of Naples, Italy.
authors.forename: Albina
authors.initials: A
authors.lastname: Riccardi
mesh_terms: D001941:Breast Diseases / Q000175:diagnosis*; D001943:Breast Neoplasms / Q000175:diagnosis*; D003924:Diabetes Mellitus, Type 2 / Q000150:complications*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008875:Middle Aged
keywords: Breast cancer; Fine needle cytology; Rare breast lesions