PMID- 33815520 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220421 IS - 1726-913X (Print) IS - 1726-9148 (Electronic) IS - 1726-913X (Linking) VI - 19 IP - 1 DP - 2021 Jan TI - A Pediatric Parathyroid Carcinoma: An Unusual Clinical Presentation and Mini-review. PG - e110234 LID - 10.5812/ijem.110234 [doi] LID - e110234 AB - INTRODUCTION: Primary hyperparathyroidism (PHPT) is a rare condition in the pediatric population. Parathyroid carcinoma (PC) is a very uncommon cause of PHPT, accounting for < 1% of pediatric PHPT cases. It is challenging to distinguish between parathyroid adenoma (PA), the most common cause of PHPT, and PC. In this report, we described a young female who presented with a history of progressive limping and was finally diagnosed with PC. CASE PRESENTATION: A 15-year-old girl presented with progressive limping and bone pain for 8 years. She was referred by an orthopedic surgeon because of elevated intact parathyroid hormone (iPTH) for further evaluation. Physical examination revealed a large, firm, and non-tender neck mass, left hip tenderness, and limited range of motion. The initial biochemistry tests showed a borderline high calcium level of 10.8 mg/dl, an elevated iPTH level of 2876 pg/mL, and a decreased phosphorus level of 2.4 mg/dL. The (99m)Technetium (Tc) sestamibi scan displayed early intense activity in the right thyroid lobe persisting in the three-hour repeat scan, compatible with a parathyroid lesion. The patient underwent right-sided neck exploration and parathyroidectomy. Intraoperative and pathology findings confirmed the diagnosis of PC. Immunohistochemistry (IHC) staining revealed creatine kinase (CK) and CD31 in endothelial cells of the tumor. Ki67 staining was also positive in 2% - 3% of tumor cells. The whole exome sequencing (WES) study was negative for cell division cycle 73 (CDC73) and multiple endocrine neoplasia 1 (MEN1) genes. CONCLUSIONS: PC should be considered as a differential diagnosis of PHPT in the pediatric population, even in the presence of mild hypercalcemia. CI - Copyright (c) 2021, International Journal of Endocrinology and Metabolism. FAU - Rahimi, Abbas AU - Rahimi A AD - Department of General Surgery, Faculty of Medicine, University of Medical Sciences, Bandar Abbas, Iran. FAU - Shahbazi, Roghayeh AU - Shahbazi R AD - Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, Canada. FAU - Nikuei, Pooneh AU - Nikuei P AD - Endocrinology and Metabolism Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran. FAU - Soleimani, Sanaz AU - Soleimani S AD - Endocrinology and Metabolism Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran. FAU - Moradkhani, Azadeh AU - Moradkhani A AD - Endocrinology and Metabolism Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran. FAU - Atashabparvar, Ali AU - Atashabparvar A AD - Endocrinology and Metabolism Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran. FAU - Khajehrahimi, Farnaz AU - Khajehrahimi F AD - Department of Nuclear Medicine, Faculty of Medicine, Hormozgan University of Medical Sciences, Bandar Abbas, Iran. FAU - Zoghi, Ghazal AU - Zoghi G AUID- ORCID: 0000-0002-6286-6999 AD - Endocrinology and Metabolism Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran. FAU - Kheirandish, Masoumeh AU - Kheirandish M AUID- ORCID: 0000-0002-7355-4456 AD - Endocrinology and Metabolism Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran. LA - eng PT - Case Reports DEP - 20210125 PL - Netherlands TA - Int J Endocrinol Metab JT - International journal of endocrinology and metabolism JID - 101235597 PMC - PMC8010565 OTO - NOTNLM OT - Hypercalcemia OT - Neck Mass OT - Parathyroid Carcinoma OT - Pediatrics OT - Primary Hyperparathyroidism COIS- Conflict of Interests: The authors declare that they have no conflict of interests. EDAT- 2021/04/06 06:00 MHDA- 2021/04/06 06:01 PMCR- 2021/01/01 CRDT- 2021/04/05 05:58 PHST- 2020/11/02 00:00 [received] PHST- 2020/12/28 00:00 [revised] PHST- 2021/01/06 00:00 [accepted] PHST- 2021/04/05 05:58 [entrez] PHST- 2021/04/06 06:00 [pubmed] PHST- 2021/04/06 06:01 [medline] PHST- 2021/01/01 00:00 [pmc-release] AID - 10.5812/ijem.110234 [doi] PST - epublish SO - Int J Endocrinol Metab. 2021 Jan 25;19(1):e110234. doi: 10.5812/ijem.110234. eCollection 2021 Jan.