title: Unusual lamellar calcifications in two rare cases of splenic aneurysms associated with fibromuscular dysplasia.
abstract: Fibromuscular dysplasia (FMD) of the splenic artery is a rare underdiagnosed condition. Here, we report two cases of FMD affecting the splenic artery: one alone and one concomitantly with the renal artery. Histology revealed fibromuscular thickening of the media layer alternating with a circumferential calcification of the whole artery thickness. Ultrastructurally, FMD showed matrix vesicles and dense bodies in the extracellular matrix. A diagnosis of FMD with calcification was made. This is the first report to document circumferential lamellar calcifications alternating with the more typical fibrotic medial areas in the rare FMD localized to splenic artery.
authors.affiliation: a Unit of Surgical Pathology, Department of Specialty, Diagnostic and Experimental Medicine (DIMES ), S. Orsola-Malpighi Hospital, Bologna University , Bologna , Italy.
authors.forename: Francesco
authors.initials: F
authors.lastname: Vasuri
authors.affiliation: b Unit of Vascular Surgery, Department of Specialty, Diagnostic and Experimental Medicine (DIMES) , S. Orsola-Malpighi Hospital, Bologna University , Bologna , Italy.
authors.forename: Antonio
authors.initials: A
authors.lastname: Freyrie
authors.affiliation: a Unit of Surgical Pathology, Department of Specialty, Diagnostic and Experimental Medicine (DIMES ), S. Orsola-Malpighi Hospital, Bologna University , Bologna , Italy.
authors.forename: Gianandrea
authors.initials: G
authors.lastname: Pasquinelli
mesh_terms: D000783:Aneurysm / Q000209:etiology / Q000473:pathology* / Q000601:surgery; D001706:Biopsy; D000072226:Computed Tomography Angiography; D005109:Extracellular Matrix / Q000648:ultrastructure; D005260:Female; D005352:Fibromuscular Dysplasia / Q000150:complications / Q000473:pathology* / Q000601:surgery; D006801:Humans; D008854:Microscopy, Electron; D008875:Middle Aged; D012077:Renal Artery / Q000601:surgery / Q000648:ultrastructure*; D013156:Splenectomy; D013157:Splenic Artery / Q000601:surgery / Q000648:ultrastructure*; D061205:Vascular Calcification / Q000209:etiology / Q000473:pathology* / Q000601:surgery
keywords: Calcification; fibromuscular dysplasia; histopathology; splenic artery