A Case of Primary Hyperparathyroidism due to Intrathyroidal Parathyroid Cyst

Figure 5

Parathyroid adenoma presenting cystic degeneration. Cystic lesion consisting of parathyroid cells separated from parathyroid gland with fibrous capsule. Note that the parathyroid parenchyma is squeezed in peripheral region of the lesion ((a) H&E ×40, (b) H&E ×100, black asterisk; cystic space, white asterisk; extraparathyroidal area, arrow; fibrous capsule, arrow head; squeezed parathyroid tissue).

(a)

(b)