The patient underwent a parathyroidectomy.

Histopathology

Macroscopic description: Left parathyroid: One tan tissue nodule, 13 x 7 x 3 mm, fixed weight: 0.19 g.

Microscopic description:  Sections show a nodular, hypercellular area of parathyroid tissue, with some adjacent normal parathyroid. There is no evidence of malignancy.

Diagnosis: Left parathyroid: consistent with a parathyroid adenoma