이소성 유과오종성 흉선종 1예

A Case of Ectopic Hamartomatous Thymoma

Ectopic hamartomatous thymoma is a rare benign tumor of the lower neck occurring in the male adult pre-dominantly. The origin of this tumor has been debated, but it is now believed to arise from remnants of the cer-vical sinus of His from early development. They are composed of epithelial, adipocytic, and spindle cells in var-iable amounts. Recognition of ectopic harmatomatous thymoma is important and needs to be differentiated from high-grade sarcomas such as synovial sarcoma or glandular malignant peripheral nerve sheath tumor. We here report on a case of ectopic hamartomatous thymoma arising in the left lateral neck of 33-year-old male patient.