A Case of Lymphomatoid Granulomatosis Presenting as a Cervical Mass.

An 89-year-old man presented with the chief complaint of a sore throat and a mass in the right side of his neck that tended to increase in size. He displayed the right Horner's sign, and imaging findings showed a 65-mm mass in the right side of the neck, invading the carotid artery. There were no other obvious lesions. The differential diagnosis was carcinoma of an unknown primary or neurogenic tumor. An incisional biopsy was performed, and the pathological diagnosis was lymphomatoid granulomatosis. The patient was started on oral prednisolone, but the disease progressed, and his general condition worsened. Therefore, supportive care was provided. This was a very rare case of a cervical lesion of lymphomatoid granulomatosis.