PMID- 38186523 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20240109 IS - 2168-8184 (Print) IS - 2168-8184 (Electronic) IS - 2168-8184 (Linking) VI - 15 IP - 12 DP - 2023 Dec TI - Metastatic Epithelioid Pleomorphic Liposarcoma in the Brain: A Case Report. PG - e50066 LID - 10.7759/cureus.50066 [doi] LID - e50066 AB - Metastatic soft tissue sarcoma (STS) to the brain is rare, and metastatic pleomorphic liposarcoma (PLPS) to the brain is even rarer. We present the case of a 76-year-old male with an incidental finding of a brain mass on a brain magnetic resonance imaging (MRI) following a head injury. Additionally, multiple pulmonary nodules and a right gluteal mass were discovered. A core biopsy of the right gluteal mass revealed an epithelioid malignant neoplasm expressing transcription factor enhancer 3 (TFE3) by immunohistochemistry (IHC). Subsequently, the left middle fossa brain mass was removed and found to be an epithelioid PLPS, which was positive for TFE3 by IHC but lacked TFE3 rearrangement by fluorescence in situ hybridization (FISH), and negative for murine double minute (MDM2) amplification by FISH. The diagnosis of epithelioid PLPS mainly relies on histomorphology. This paper discusses the clinicopathological correlation of PLPS, including the epithelioid variant, with a focus on cases with brain metastases. CI - Copyright (c) 2023, Wang et al. FAU - Wang, Tengfei AU - Wang T AD - Pathology, Baylor Scott & White Health, Temple, USA. FAU - Waworuntu, Kiersten L AU - Waworuntu KL AD - Pathology, Baylor Scott & White Health, Temple, USA. FAU - Shan, Frank Y AU - Shan FY AD - Pathology and Neurosurgery, Baylor Scott & White Health, Temple, USA. LA - eng PT - Case Reports DEP - 20231206 PL - United States TA - Cureus JT - Cureus JID - 101596737 PMC - PMC10769534 OTO - NOTNLM OT - brain metastasis OT - epithelioid variant OT - histomorphology OT - mdm2 OT - pleomorphic liposarcoma COIS- The authors have declared that no competing interests exist. EDAT- 2024/01/08 06:43 MHDA- 2024/01/08 06:44 PMCR- 2023/12/06 CRDT- 2024/01/08 04:26 PHST- 2023/10/26 00:00 [received] PHST- 2023/12/05 00:00 [accepted] PHST- 2024/01/08 06:44 [medline] PHST- 2024/01/08 06:43 [pubmed] PHST- 2024/01/08 04:26 [entrez] PHST- 2023/12/06 00:00 [pmc-release] AID - 10.7759/cureus.50066 [doi] PST - epublish SO - Cureus. 2023 Dec 6;15(12):e50066. doi: 10.7759/cureus.50066. eCollection 2023 Dec.