Abstract
A 37-year-old female visited our hospital complaining mainly of a tumor in the dexter lateral cervical region (anterior sternocleidomastoid muscle) . CT photos revealed a cystic lesion, and its yellow serum liquid was aspirated using a trial puncture. In a biochemical analysis, the liquid showed higher GOT, LDH, CPK, and amylase levels compared to the patient's serum. Cytodiagnosis revealed that the tumor was not malignant. However, the tumor, was diagnosed as a squamous cell carcinoma by postoperative histopathological tissue examination. Suspecting a metastatic carcinoma, the patient was examined thoroughly but primary tumor was found. In current, periodic observations, there has been no local recurrence of the tumor or development of a primary tumor. These findings suggested that this tumor was a squamous cell carcinoma originating in the lateral cervical region called a Branchiogenic cancer. As for the mechanism of its occurrence, biochemical analysis of the extracted serum liquid indicated that the epithelium of the salivary gland tissue ectopically aberrated to the lymph node became a cyst that developed into a malignant tumor.
