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  • Title: Calcium pyrophosphate dihydrate deposition disease (CPPD)/Pseudogout of the temporomandibular joint - FNA findings and microanalysis.
    Author: Naqvi AH, Abraham JL, Kellman RM, Khurana KK.
    Journal: Cytojournal; 2008 Apr 21; 5():8. PubMed ID: 18426573.
    Abstract:
    We report a case of a Calcium pyrophosphate dihydrate deposition disease (CPPD) presenting as a mass in the parotid and temporomandibular joint (TMJ) that simulated a parotid tumor. A 35 year-old man presented with pain in the left ear area. A CT Scan of the area showed a large, calcified mass surrounding the left condylar head, and extending into the infratemporal fossa. FNA of the mass showed birefringent crystals, most of which were rhomboid with occasional ones being needle shaped, embedded in an amorphous pink substance. Scanning electron microscopy (SEM) with energy dispersive x-ray spectroscopy (EDS) of these crystals showed peaks corresponding to calcium and phosphorus. SEM/EDS is a rapid method of diagnosing calcium pyrophosphate dihydrate deposition disease (CPPD) and an alternative to more commonly used method of special staining of cell block sections coupled with polarizing microscopy.
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