PMID- 32993530 OWN - NLM STAT- MEDLINE DCOM- 20201102 LR - 20201102 IS - 1471-2350 (Electronic) IS - 1471-2350 (Linking) VI - 21 IP - 1 DP - 2020 Sep 29 TI - A novel mutation of the MEN1 gene in a patient with multiple endocrine neoplasia type 1 and recurrent fibromyxoid sarcoma - a case report. PG - 190 LID - 10.1186/s12881-020-01129-4 [doi] LID - 190 AB - BACKGROUND: Multiple endocrine neoplasia type 1 (MEN1) syndrome is usually accompanied by endocrine tumors, but non-endocrine tumors can occur as well. However, the coexistence of MEN1 syndrome and malignant tumor such as low-grade fibromyxoid sarcoma has not been described in the literature. Moreover, the MEN1 gene mutations have not been identified in patients with fibromyxoid sarcoma, so far. CASE PRESENTATION: We present a patient with a long-year endocrine follow-up due to multiple endocrine tumors. During his lifespan, he has been surgically treated for pancreatic gastrinoma, parathyroid hyperplasia, atypical pulmonary carcinoid, various benign mesenchymal, and several skin tumors (basocellular tumor, lipomas, and fibromas) which raised a high clinical suspicion of MEN1 syndrome but the patient refused genetic testing. Recently, he developed a novel malignant tumor - recurrent low-grade fibromyxoid sarcoma of the trunk and extremities with multiple subsequent operations. The patient eventually accepted the genetic testing which proved him to be a carrier of a novel mutation in the MEN1 gene. CONCLUSIONS: Unlike some other syndromes where a genetic mutation can predict clinical course, there is no genotype-phenotype correlation in MEN1 syndrome. Therefore, these patients require lifelong and multidisciplinary surveillance, not only for typical endocrine and benign non-endocrine tumors but also for diverse and even more malignant forms. The atypical clinical presentation should pose suspicion about new gene mutation and serve as a warning in the further follow-up. FAU - Radman, Maja AU - Radman M AD - Department of Endocrinology and Diabetology, University Hospital Centre Split, Soltanska 1, Split, Croatia. AD - University of Split, School of Medicine, Soltanska 2, Split, Croatia. FAU - Milicevic, Tanja AU - Milicevic T AUID- ORCID: 0000-0003-3083-6880 AD - Department of Endocrinology and Diabetology, University Hospital Centre Split, Soltanska 1, Split, Croatia. tanja.milicevic2@gmail.com. LA - eng PT - Case Reports PT - Journal Article DEP - 20200929 PL - England TA - BMC Med Genet JT - BMC medical genetics JID - 100968552 RN - 0 (MEN1 protein, human) RN - 0 (Proto-Oncogene Proteins) SB - IM MH - Fibrosarcoma/diagnosis/*genetics MH - Genetic Testing MH - Humans MH - Male MH - Middle Aged MH - Multiple Endocrine Neoplasia Type 1/diagnosis/*genetics MH - *Mutation MH - Neoplasm Recurrence, Local MH - Proto-Oncogene Proteins/*genetics PMC - PMC7526371 OTO - NOTNLM OT - Low-grade fibromyxoid sarcoma OT - Multiple endocrine neoplasia type 1 OT - Mutation OT - Tumor-suppressing gene COIS- The authors declare that they have no competing interests. EDAT- 2020/10/01 06:00 MHDA- 2020/11/03 06:00 PMCR- 2020/09/29 CRDT- 2020/09/30 05:45 PHST- 2020/07/14 00:00 [received] PHST- 2020/09/22 00:00 [accepted] PHST- 2020/09/30 05:45 [entrez] PHST- 2020/10/01 06:00 [pubmed] PHST- 2020/11/03 06:00 [medline] PHST- 2020/09/29 00:00 [pmc-release] AID - 10.1186/s12881-020-01129-4 [pii] AID - 1129 [pii] AID - 10.1186/s12881-020-01129-4 [doi] PST - epublish SO - BMC Med Genet. 2020 Sep 29;21(1):190. doi: 10.1186/s12881-020-01129-4.