Parathyroid carcinoma: Three case reports

Figure 1 Parathyroid carcinoma of the lower pole of the thyroid on the right side in a 59-year-old man. A: Doppler ultrasound revealed a complex nodule (with mixed echogenicity), i.e., with solid and fluid components; B: Color doppler flow imaging indicated punctate blood flow signals were detected in the solid part of the nodule and its periphery; C: The neoplastic chief cells of the parathyroid glands were arranged in solid sheets, nests and acini, indicating diffuse infiltrative growth.