A 57 Year Old Woman with Diabetes and Chronic Renal

A 57 year old woman with diabetes and chronic renal failure was experiencing several bouts with kidney stones.These were proven to be derived from calcium,and her serum calcium level was found to be high normal.Her parathyroid glands were all removed,and a representative gland is shown in the bottom photomicrograph,compared to a normal parathyroid (from another patient) in photo (a) .Which one of the following is the best diagnosis?

A) Metastatic adenocarcinoma
B) Parathyroid adenoma
C) Parathyroid carcinoma
D) Parathyroid hyperplasia
E) Pituitary adenoma