PRIMARY HYPERPARATHYROIDISM ASSOCIATED WITH A CYSTIC LESION IN THE NECK: PROBABLE PARATHYROID CYST

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Abstract
A case of primary hyperparathyroidism is described in which there was clinical and biochemical resolution after a cystic lesion in the superior left lobe of the thyroid gland was surgically removed. On histologic step-section of the cyst an aggregation of epithelial cells was seen in its wall but they could not be definitely identified as parathyroid in origin. Clinical and biochemical evidence is presented which suggests that the lesion was a hyperfunctioning parathyroid cyst. Emphasis is placed on careful historical evaluation regarding manifestations of hyperparathyroidism in patients who have a mass in the anterior neck. Appropriate laboratory investigation in suspected cases may help to document the functional significance of such lesions.