PMID- 29225207 OWN - NLM STAT- MEDLINE DCOM- 20180907 LR - 20181202 IS - 1348-4540 (Electronic) IS - 0918-8959 (Linking) VI - 65 IP - 2 DP - 2018 Feb 26 TI - Parathyroid carcinoma occurred in two glands in multiple endocrine neoplasia 1: a report on a rare case. PG - 245-252 LID - 10.1507/endocrj.EJ17-0409 [doi] AB - Primary hyperparathyroidism is the most common hormonal manifestation associated with multiple endocrine neoplasia 1 (MEN1). It is generally caused by parathyroid hyperplasia, and parathyroid carcinoma is rare. Here, we report a case of MEN1 with parathyroid carcinoma in two parathyroid glands causing primary hyperparathyroidism. A 40-year-old man with primary hyperparathyroidism due to MEN1 underwent a total parathyroidectomy. His corrected calcium and intact PTH (i-PTH) serum levels were 10.8 mg/dL and 203 pg/mL, respectively. Although three glands were successfully removed, the left upper parathyroid gland could not be detected. Since the right lower parathyroid lesion had invaded into the thyroid, right lobectomy was performed. A portion of the left lower parathyroid tissue was transplanted into his forearm. The histological findings of the left lower and the right upper parathyroid glands were consistent with hyperplasia while that of the right lower parathyroid gland was parathyroid carcinoma. Since the post-surgical i-PTH levels remained high, the intrathyroidal lesion of the left lobe, which was initally diagnosed as an adenomatous nodule, was suspected to contain parathyroid tumor. A fine needle aspiration of the tumor revealed a high concentration of i-PTH. One week after the first surgery, a left thyroid lobectomy was performed. The pathological diagnosis of the tumor was parathyroid carcinoma. After the surgery, calcium and i-PTH levels were normal. Although it is rare, parathyroid carcinoma should be considered as a cause of hyperparathyroidism in MEN1 patients. Since it is difficult to diagnose parathyroid carcinoma before surgery, intraoperative findings are important for the appropriate treatment. FAU - Omi, Yoko AU - Omi Y AD - Department of Breast and Endocrine Surgery, Tokyo Women's Medical University, Tokyo, Japan. FAU - Horiuchi, Kiyomi AU - Horiuchi K AD - Department of Breast and Endocrine Surgery, Tokyo Women's Medical University, Tokyo, Japan. FAU - Haniu, Kento AU - Haniu K AD - Department of Breast and Endocrine Surgery, Tokyo Women's Medical University, Tokyo, Japan. FAU - Tokura, Momoko AU - Tokura M AD - Department of Breast and Endocrine Surgery, Tokyo Women's Medical University, Tokyo, Japan. FAU - Nagai, Erin AU - Nagai E AD - Department of Breast and Endocrine Surgery, Tokyo Women's Medical University, Tokyo, Japan. FAU - Isozaki, Osamu AU - Isozaki O AD - Department of Medicine II, Tokyo Women's Medical University, Tokyo, Japan. FAU - Nagashima, Yoji AU - Nagashima Y AD - Department of Surgical Pathology, Tokyo Women's Medical University, Tokyo, Japan. FAU - Okamoto, Takahiro AU - Okamoto T AD - Department of Breast and Endocrine Surgery, Tokyo Women's Medical University, Tokyo, Japan. LA - eng PT - Case Reports PT - Journal Article DEP - 20171208 PL - Japan TA - Endocr J JT - Endocrine journal JID - 9313485 RN - 0 (Parathyroid Hormone) SB - IM MH - Adult MH - Choristoma/complications/*diagnosis/metabolism MH - Humans MH - Hyperparathyroidism, Primary/*diagnosis/etiology MH - Male MH - Multiple Endocrine Neoplasia Type 1/complications/*diagnosis/pathology MH - Neoplasms, Multiple Primary/diagnosis/metabolism/pathology MH - Pancreatic Neoplasms/complications/diagnosis/pathology MH - Paraneoplastic Endocrine Syndromes/complications/*diagnosis/metabolism MH - *Parathyroid Glands MH - Parathyroid Hormone/metabolism MH - Parathyroid Neoplasms/*diagnosis/pathology MH - Thyroid Neoplasms/*diagnosis/metabolism/secondary OTO - NOTNLM OT - Multiple endocrine neoplasia 1 OT - Parathyroid carcinoma OT - Primary hyperparathyroidism EDAT- 2017/12/12 06:00 MHDA- 2018/09/08 06:00 CRDT- 2017/12/12 06:00 PHST- 2017/12/12 06:00 [pubmed] PHST- 2018/09/08 06:00 [medline] PHST- 2017/12/12 06:00 [entrez] AID - 10.1507/endocrj.EJ17-0409 [doi] PST - ppublish SO - Endocr J. 2018 Feb 26;65(2):245-252. doi: 10.1507/endocrj.EJ17-0409. Epub 2017 Dec 8.