Hideki Hoshi

Tumoral calcium pyrophosphate dihydrate crystal deposition disease of the temporomandibular joint: identification on crystallography.

This paper reports a case of calcium pyrophosphate dihydrate (CPPD) crystal deposition in the temporomandibular joint (TMJ) of a 59‐year‐old man with the chief complaint of severe pain in the left TMJ. On CT a radiopaque area was seen around the condylar process of the left TMJ with irregular destructive bony changes. A provisional diagnosis of crystalline‐induced arthritis was made on histopathology of a biopsy specimen. Electron probe microanalysis (EPMA), scanning electron microscopy (SEM) and X‐ray diffraction showed both CPPD and hydroxyapatite (HA) in the crystalline materials. Identification of these two types of crystal in crystal deposition disease of TMJ, using crystallography, is discussed.

Three Case Reports of Synovial Chondromatosis of Temporomandibular Joint: Histopathologic Analyses of Minute Cartilaginous Loose Bodies From Joint Lavage Fluid and Comparison With Phase II and III Cases

0 Synovial chondromatosis (SC) is a benign monoarticular lesion characterized by chondrometaplasia of the synovial membrane with cartilaginous loose bodies often found released into the joint spaces. It is a condition that mainly affects the large joint areas, such as the knee, hip, and elbow, and SC of the temporomandibular joint (TMJ) is rarely seen. The common characteristics of SC of the TMJ include swelling, unilateral pain, occlusal changes, clicking, crepitation, deviation, and limited mandibular function. In he early stages of SC of the TMJ, the cartilaginous odules or loose bodies are often undetectable on lain radiographs. The symptoms are similar to that of emporomandibular disorder (TMD); consequently, any months or years often pass before the correct iagnosis is made. Milgram divided the conditions of SC into 3 separate phases, and each developmental stage was fur-

A huge osteoma of the mandible detected with head and neck computed tomography

Abstract We encountered a patient with a huge osteoma extending over half of the mandible, which was incidentally discovered on a head-and-neck computed tomography (CT) by an otolaryngological examination for vertigo. A tumorous lesion of the right mandible was noted, and the patient was referred to our department. The tumor extended from the median mandible over the right anterior margin of the ramus of the mandible. To improve the abnormal intraoral morphology, tumor resection and orthopedic surgery were performed. The histopathological diagnosis was a cancellous osteoma. Dentures were attached after surgery, and the postoperative course has been favorable with no tumor re-enlargement.

Oral lichenoid drug reaction with autoantibodies in peripheral blood: Case report

Abstract A 51-year-old man complained of oral roughness and pain. At the age of 49 years, he was admitted for 8 months for bipolar emotional disorder. Oral administration of lithium carbonate was started. Extensive, hemorrhagic, erythema-mixed white lace-like patches were noted on the lip, buccal mucosae, and lingual margins. On biopsy, all lesions were consistent with oral lichen planus. A drug lymphocyte stimulation test showed a positive reaction to lithium carbonate. Blood examination revealed marked increases in the peripheral blood levels of antinuclear antibodies. To relieve the symptoms, the systemic administration of prednisolone was performed while continuing the lithium carbonate.