CASE REPORTS
JOURNAL ARTICLE
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Septic Arthritis of the Temporomandibular Joint--Unusual Presentations.

This report describes 2 patients whose septic arthritis of the temporomandibular joint (SATMJ) presented atypically, resulting in treatment delay and complications. A 49-year-old man developed left-side facial allodynia, which was first treated unsuccessfully as trigeminal neuralgia. On day 21, the patient sustained facial trauma from a fall and presented to the emergency department (ED). Maxillofacial contrast-enhanced computed tomographic (CT) scan was suggestive of parotiditis, SATMJ, or hemarthrosis. His condition did not improve with empiric antibiotic treatment. On day 30, contrast-enhanced magnetic resonance imaging (MRI) confirmed SATMJ. Incision and drainage yielded 6 mL of pus and produced clinical improvement. Cultures grew methicillin-resistant Staphylococcus aureus, which was treated with amoxicillin plus clavulanate and sulfamethoxazole plus trimethoprim for 30 days. On day 59, the patient still had slight preauricular pain and CT-proved TMJ osteoarthritic changes. A 56-year-old woman developed right-side facial pain after a crown procedure on her right mandibular second molar. Oral prednisone (and clindamycin) produced partial relief. Her primary physician suspected temporal arteritis, but its biopsy result on day 11 was normal. Gradually, the patient developed trismus and malocclusion refractory to various medicines. On day 49, she presented to the ED. A contrast-enhanced maxillofacial CT scan suggested SATMJ. Incision and drainage yielded 30 mL of pus and produced clinical improvement. During days 50 to 57, the patient received intravenous ampicillin plus sulbactam and metronidazole. However, preauricular tenderness and drainage from the surgical incision persisted. On day 55, CT scan showed a residual abscess. Secondary debridement yielded 5 mL of pus. Culture grew coagulase-negative S aureus. On day 141, the patient still had slight preauricular pain and TMJ osteoarthritic changes on MRI. In these cases, the SATMJ diagnosis was delayed owing to the mildness of local and systemic manifestations, the possibility of confounding conditions, and the rarity of SATMJ. Contrast-enhanced CT and MRI facilitated the diagnosis. Abscess drainage alleviated the symptoms. Postinfectious osteoarthritis developed possibly from treatment delay. SATMJ should be considered in all patients with enigmatic preauricular pain, trismus, or malocclusion.

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