title: Differential diagnosis of calcium pyrophosphate dihydrate deposition of the temporomandibular joint.
abstract: Calcium pyrophosphate dihydrate (CPPD) deposition disease (pseudogout) of the temporomandibular joint (TMJ) is rare. It is characterized by the presence of crystal deposits that are birefringent under polarized light. Although these crystals are characteristically weakly birefringent, some other crystals such as those of calcium oxalate, synthetic steroids, and ethylenediaminetetraacetic acid are also birefringent. The differential diagnosis should therefore be based on a quantitative analysis of crystals or observation of the crystal structure in calcified sections. We present a case of CPPD deposition disease of the TMJ and report on the value of such an analysis to substantiate the diagnosis.
authors.affiliation: Maxillofacial Surgery, Maxillofacial Reconstruction and Function, Division of Maxillofacial and Neck Reconstruction, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Aoyama
authors.forename: K
authors.initials: K
authors.lastname: Kino
authors.forename: T
authors.initials: T
authors.lastname: Amagasa
authors.forename: T
authors.initials: T
authors.lastname: Kayano
authors.forename: S
authors.initials: S
authors.lastname: Ichinose
authors.forename: Y
authors.initials: Y
authors.lastname: Kimijima
mesh_terms: D001706:Biopsy; D002805:Chondrocalcinosis / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D003460:Crystallization; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008875:Middle Aged; D010808:Physical Examination; D013704:Temporomandibular Joint / Q000473:pathology / Q000601:surgery; D013705:Temporomandibular Joint Disorders / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery