Abstract
A 49-year-old man noticed a mass on the right side of his neck for 1 month. An abscess lesion was susupected based on the clinical findings and CT appearances. A careful examination failed to reveal any lesions except for the neck mass. The lesion did not decrease in size in spite of the administration of antibiotics. After finding squamous cells in a cytodiagnosis of a specimen from the mass, we suspected the patient to either a brachiogenic tumor or primary unknown neck metastasis. A modified neck dissection followed by postoperative chemotherapy and radiotherapy were performed. The histopathological diagnosis was squamous cell carcinoma arising from the epithelial lining of a cystic lesion. The patient has survived for 12 months without recurrence under a clinical diagnosis of brachiogenic carcinoma.
