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Chen C, Cao J, Song L, Wang W, Guo D, Shi Q, Zhang Y, Chen Y, Liu C, Li F. Primary lipoblastic nerve sheath tumor in an inguinal lymph node mimicking metastatic tumor: a case report and literature review. Front Oncol 2023; 13:1258769. [PMID: 37965461 PMCID: PMC10642330 DOI: 10.3389/fonc.2023.1258769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 10/18/2023] [Indexed: 11/16/2023] Open
Abstract
Lipoblastic nerve sheath tumors of soft tissue are characterized as schwannoma tumors that exhibit adipose tissue and lipoblast-like cells with signet-ring morphology. They have been documented to arise in various anatomic locations, including the thigh, groin, shoulder, and retroperitoneum. However, to our knowledge, this tumor has not been previously reported as a lymph node primary. We present herein the first case of a benign primary lipoblastic nerve sheath tumor arising in an inguinal lymph node in a 69-year-old man. Microscopic examination revealed a multinodular tumor comprising fascicles of spindle cells, as well as adipocytic and lipoblast-like signet-ring cell component in the context of schwannoma. Despite the presence of some bizarre cells with nuclear atypia, no obvious mitotic activity or necrosis was observed. Immunohistochemical analysis showed strong and diffuse expression of S-100, SOX10, CD56, and NSE in the spindle cells as well as in the signet-ring lipoblast-like cells and the mature adipocytes. Sequencing analysis of the neoplasm identified six non-synonymous single nucleotide variant genes, specifically NF1, BRAF, ECE1, AMPD3, CRYAB, and NPHS1, as well as four nonsense mutation genes including MRE11A, CEP290, OTOA, and ALOXE3. The patient remained alive and well with no evidence of recurrence over a period of ten-year follow-up.
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Affiliation(s)
- Chengxin Chen
- Department of Pathology and Key Laboratory for Xinjiang Endemic & Ethnic Diseases, The First Affiliated Hospital, Shihezi University School of Medicine, Shihezi, China
| | - Jiachen Cao
- Department of Pathology and Medical Research Center, Beijing Institute of Respiratory Medicine and Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Lingxie Song
- Department of Pathology and Medical Research Center, Beijing Institute of Respiratory Medicine and Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Wenjie Wang
- Department of Pathology and Key Laboratory for Xinjiang Endemic & Ethnic Diseases, The First Affiliated Hospital, Shihezi University School of Medicine, Shihezi, China
| | - Dandan Guo
- Department of Pathology and Medical Research Center, Beijing Institute of Respiratory Medicine and Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Qi Shi
- Department of Pathology and Medical Research Center, Beijing Institute of Respiratory Medicine and Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Ying Zhang
- Department of Pathology and Medical Research Center, Beijing Institute of Respiratory Medicine and Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Yunzhao Chen
- The People’s Hospital of Suzhou National Hi-Tech District, Suzhou, China
| | - Chunxia Liu
- Department of Pathology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Feng Li
- Department of Pathology and Key Laboratory for Xinjiang Endemic & Ethnic Diseases, The First Affiliated Hospital, Shihezi University School of Medicine, Shihezi, China
- Department of Pathology and Medical Research Center, Beijing Institute of Respiratory Medicine and Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
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