A rare manifestation of parathyroid carcinoma presenting as a cystic neck mass.

Parathyroid carcinoma is a rare endocrine neoplasm. An unusual case is reported where a patient presented with a cystic neck mass and hypercalcemia. A review of the Connecticut Tumor Registry data revealed that four cases were encountered statewide over years 1988 to 1993. A brief overview of the current literature follows.