图示增生的甲状旁腺，3个半腺体被切除(左下显示半个腺体)。甲状旁腺增生是原发性甲状旁腺功能亢进症第二常见的症状,而甲状旁腺癌最少见。
Parathyroid hyperplasia is shown here. Three and one-half glands have been removed (only half the gland at the lower left is present). Parathyroid hyperplasia is the second most common form of primary hyperparathyroidism, with parathyroid carcinoma the least common form.
