title: Pelvic pseudotumoral calcium pyrophosphate dihydrate deposition: an ultrastructural study.
abstract: We analyzed large periarticular calcifications of the hips and pubis in a woman with diffuse primary chondrocalcinosis, symptomatic in the knees. Serial articular and periarticular biopsies were obtained during surgery for osteoporotic hip fracture. Histologic examination showed diffuse nonbirefringent clumps in red alizarin stained cartilage, capsula and tendon. Scanning electron microscopy with microanalysis indicated a calcium/phosphorus atomic ratio of about 1. Transmission electron microscopy, electron diffraction and Raman spectroscopy assessed calcium pyrophosphate dihydrate (CPPD) in cartilage, synovia, capsula, tendon and muscle. The cause of these hard to observe, bulky CPPD periarticular deposits, which resembled basic calcium phosphate on radiography, is still unclear.
authors.affiliation: Biomaterial and Calcified Tissue Research Laboratory, Nantes University Hospital Center, France.
authors.forename: Y M
authors.initials: YM
authors.lastname: Maugars
authors.forename: L F
authors.initials: LF
authors.lastname: Peru
authors.forename: B
authors.initials: B
authors.lastname: el Messaoudi
authors.forename: G O
authors.initials: GO
authors.lastname: Michaud
authors.forename: J M
authors.initials: JM
authors.lastname: Berthelot
authors.forename: A M
authors.initials: AM
authors.lastname: Prost
authors.forename: G
authors.initials: G
authors.lastname: Daculsi
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002131:Calcium Pyrophosphate / Q000032:analysis; D002805:Chondrocalcinosis / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D003937:Diagnosis, Differential; D004577:Electron Probe Microanalysis; D005260:Female; D006620:Hip Fractures / Q000209:etiology / Q000601:surgery; D006622:Hip Prosthesis; D006801:Humans; D008854:Microscopy, Electron; D015663:Osteoporosis, Postmenopausal / Q000150:complications; D010386:Pelvic Neoplasms / Q000175:diagnosis*; D011859:Radiography; D013059:Spectrum Analysis, Raman
chemical_list: D002131:Calcium Pyrophosphate