抄録
A 46-year-old man complained only of hoarseness. Right recurrent laryngeal nerve paralysis was seen, but neck tumor was not palpable, 201T1 subtraction 99mTc scanning and parathyroid hormon (PTH-c) were within normal limits. From Echo, CT and MRI etc, parathyroid tumor was suspected. En block dissection of the tumor was performed.
At histopathological examination, recurrent laryngeal nerve had atrophic change under pressure of tumor, not infiltrated. The individual tumor cells had poorly atypia and rarely showed mitoses, but blood vessel invasion was found at a part. So parathyroid carcinoma was diagnosed.
