PMID- 32475867 OWN - NLM STAT- MEDLINE DCOM- 20210810 LR - 20210810 IS - 1348-4540 (Electronic) IS - 0918-8959 (Linking) VI - 67 IP - 9 DP - 2020 Sep 28 TI - Parathyroid carcinoma coexisting with multiple parathyroid adenomas: a case report. PG - 963-967 LID - 10.1507/endocrj.EJ20-0139 [doi] AB - Primary hyperparathyroidism is usually caused by parathyroid adenoma; however, parathyroid carcinoma is a rare cause. We report a rare case of 74-year-old female of primary hyperparathyroidism caused by parathyroid carcinoma (PC) and coexisting multiple parathyroid adenomas. She was referred to our hospital for primary hyperparathyroidism and a suspected thyroid tumor. She had no family history of malignant tumor. Computed tomography (CT) and ultrasonography of the neck revealed some masses posterior to both thyroid lobes. Those masses were believed to be parathyroid lesions. However, another mass located posterior to the right upper thyroid lobe seemed to be heterogeneous, which indicated a malignant thyroid tumor as well as parathyroid tumor. The preoperative diagnosis was multiple parathyroid adenoma and suspicious incidental thyroid carcinoma. Therefore, the patient underwent total parathyroidectomy and thyroidectomy. The histopathological diagnosis was parathyroid carcinoma coexisting with multiple parathyroid adenomas. There was no evidence of recurrence at 1 year after the surgery. It was difficult to diagnose PC preoperatively. Few rare cases of PC coexisting with parathyroid adenoma in multiple endocrine neoplasia type 1 (MEN1) have been reported. Therefore, careful follow-up was necessary considering the possibility of MEN1, though she did not wish for a genetic examination. FAU - Takenobu, Masao AU - Takenobu M AD - Kusatsu General Hosipital, Otolaryngology Head and Neck Thyroid Surgery, Shiga 525-8585, Japan. FAU - Moritani, Sueyoshi AU - Moritani S AD - Kusatsu General Hosipital, Otolaryngology Head and Neck Thyroid Surgery, Shiga 525-8585, Japan. FAU - Kawamoto, Katsuyuki AU - Kawamoto K AD - Kusatsu General Hosipital, Otolaryngology Head and Neck Thyroid Surgery, Shiga 525-8585, Japan. FAU - Yoshioka, Kana AU - Yoshioka K AD - Kusatsu General Hosipital, Otolaryngology Head and Neck Thyroid Surgery, Shiga 525-8585, Japan. FAU - Kitano, Hiroya AU - Kitano H AD - Kusatsu General Hosipital, Otolaryngology Head and Neck Thyroid Surgery, Shiga 525-8585, Japan. LA - eng PT - Case Reports PT - Journal Article DEP - 20200530 PL - Japan TA - Endocr J JT - Endocrine journal JID - 9313485 SB - IM MH - Adenoma/*complications/diagnostic imaging/pathology MH - Aged MH - Carcinoma/*complications/diagnostic imaging/pathology MH - Female MH - Humans MH - Parathyroid Glands/*diagnostic imaging/pathology MH - Parathyroid Neoplasms/*complications/diagnostic imaging/pathology MH - Tomography, X-Ray Computed MH - Ultrasonography OTO - NOTNLM OT - Multiple parathyroid adenoma OT - Parathyroid adenoma OT - Parathyroid carcinoma OT - Primary hyperparathyroidism EDAT- 2020/06/02 06:00 MHDA- 2021/08/11 06:00 CRDT- 2020/06/02 06:00 PHST- 2020/06/02 06:00 [pubmed] PHST- 2021/08/11 06:00 [medline] PHST- 2020/06/02 06:00 [entrez] AID - 10.1507/endocrj.EJ20-0139 [doi] PST - ppublish SO - Endocr J. 2020 Sep 28;67(9):963-967. doi: 10.1507/endocrj.EJ20-0139. Epub 2020 May 30.