Septic Arthritis of the Temporomandibular Joint with Intracranial Extension: A Case Report.

Septic arthritis of the temporomandibular joint (TMJ) is rare with few cases reported in the literature. We present a case of septic arthritis of the left TMJ in an 18-year-old man who was initially referred as a suspected TMJ dislocation. He had a 3-day history of pain, trismus and malocclusion with left preauricular swelling and became clinically septic with a positive blood culture containing Fusobacterium necrophorum. Computed tomography revealed left TMJ effusion. A later scan showed evidence of a temporal space collection and development of an intracranial extension in the left middle cranial fossa. The patient underwent needle arthrocentesis and drainage, followed by six weeks of antibiotic therapy following advice from neurosurgery and microbiology. Further imaging revealed resolution of the collection. Few cases have been reported of this unusual diagnosis, and this case demonstrates the importance of close multidisciplinary input in forming an accurate diagnosis and managing appropriately. © The Association of Oral and Maxillofacial Surgeons of India 2021.