title: Fine-needle aspiration cytology of pseudoangiomatous stromal hyperplasia of the breast.
abstract: Pseudoangiomatous stromal hyperplasia (PASH) is an uncommon lesion usually found in premenopausal women. Histologically, it is characterized by complex, anatomosing, empty slit-like spaces in a dense collagenous stroma. These pseudoangiomatous spaces are lined by monomorphic spindle cells of myofibroblastic differentiation. Cytological features of PASH are rarely discussed and reported, and may pose diagnostic challenge to surgical pathologists. Two cases of PASH are reported with emphasis on the FNAC features and cytologic differentiation from other benign fibroepithelial lesions.
authors.affiliation: Department of Pathology, United Christian Hospital, Hong Kong, China.
authors.forename: Philip C W
authors.initials: PC
authors.lastname: Lui
authors.forename: Bonita K B
authors.initials: BK
authors.lastname: Law
authors.forename: Winnie C W
authors.initials: WC
authors.lastname: Chu
authors.forename: Lai-Man
authors.initials: LM
authors.lastname: Pang
authors.forename: Gary M K
authors.initials: GM
authors.lastname: Tse
mesh_terms: D000328:Adult; D044963:Biopsy, Fine-Needle; D001940:Breast / Q000473:pathology*; D001941:Breast Diseases / Q000175:diagnosis* / Q000473:pathology; D001943:Breast Neoplasms / Q000473:pathology*; D005260:Female; D006391:Hemangioma / Q000473:pathology*; D006801:Humans; D006965:Hyperplasia; D008875:Middle Aged