A Case of Tophaceous Pseudogout with Destruction of the Skull Base at the Temporomandibular Joint

We report a case of tophaceous pseudogout that occurred in the temporomandibular joint (TMJ) and presented with skull base destruction. The patient was a 73-year-old woman, who complained of an obstructed ear sensation in December 2021. The otolaryngological exami-nation was unremarkeable, and a computed tomography scan revealed a calcified lesion in the left TMJ. Suspected of hav -ing osteochondroma, the patient was brought to our hospi-tal. She was performed tumor resection as much as possible under general anesthesia revealed nodular pseudogout. The patient refused to undergo total resection due to the neces-sary craniotomy and the risk of postoperative complications. Instead, the patient decided to undergo following-up. One year and 4 months have passed since the biopsy operation, but there is no tendency to re-increase.