Primary Hypoparathyroidism and Non-functioning Pituitary Adenoma: An Incidental Coexistence?

Primary hypoparathyroidism is caused by a group of heterogeneous conditions in which hypocalcemia and hyperphosphatemia occur as a result of deficient parathyroid hormone (PTH) secretion. The most common cause is surgical excision and damage to the parathyroid gland(s). Nonetheless, autoimmune endocrine disorder of primary hypothyroidism has been well-described in polyglandular autoimmune syndromes (PAS).1 Its association with pituitary lesion may be autoimmune lymphocytic hypophysitis as the cause for pituitary disorder. In this report, we encountered a patient with primary hypoparathyroidism who had a non-functioning pituitary tumour. It was confirmed as pituitary adenoma rather than lymphocytic hypophysitis from the histopathological examination. To our knowledge, this is the first reported case of non-functioning pituitary macroadenoma and primary hypoparathyroidism