A Rare Case of Chondrosarcoma With Metastasis to the Oral Cavity.

Chondrosarcomas with metastases to oral cavities are extremely rare. To the best of our knowledge, only six cases of chondrosarcoma with metastases to the oral cavity, maxilla, and/or mandible have been reported in the English-language literature. The last such case was reported three decades earlier; none of the reported cases were from India. We present the case of an Indian patient with chondrosarcoma in the knee region, who was treated with surgical excision in 2013. However, he experienced a recurrence in 2019, developed upper gingival metastasis in 2020, and succumbed within two months of this unique presentation. Oral metastatic lesions have a wide differential diagnosis, and awareness of this rare presentation can help clinicians maintain an index of suspicion for an underlying metastatic malignancy. Our experience emphasizes the importance of detailed history-taking, clinical examination, and consideration of metastases as a differential diagnosis, even if there is no reported history of malignancy. Such lesions may also be the first sign of an occult primary tumor, which will require prompt investigation for early diagnosis and treatment.