PMID- 36721560 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20230202 IS - 2168-8184 (Print) IS - 2168-8184 (Electronic) IS - 2168-8184 (Linking) VI - 14 IP - 12 DP - 2022 Dec TI - Histiocytic Sarcoma Secondary to Gastrointestinal Stromal Tumors: A Literature Review. PG - e33055 LID - 10.7759/cureus.33055 [doi] LID - e33055 AB - Histiocytic sarcoma (HS) is a rare tumor that may result from the transdifferentiation of preexisting hematolymphoid neoplasms in a subset of patients. There are instances of correlation or concurrence between HS and a number of cancers, particularly B-cell-associated hematopoietic tumors. Only three cases of HS occurring subsequent to or concurrently with gastrointestinal stromal tumors (GIST) have been recorded. Our main objective was to give an overview of demographics, clinical signs and symptoms, histopathological findings, and immunohistochemical and molecular analysis when HS develops secondary to or concurrently with GIST. A search of PubMed, Google Scholar, and ScienceDirect was undertaken using Medical Subject Headings (MeSH) keywords. According to the findings of our review, there were two males (66.6%) and one female (33.3%). The average age of patients at presentation was 59.6 years. On the immunohistochemistry, three patients were positive for cluster of differentiation (CD) 68 (100%), two patients were positive for CD 163 (67%), one patient was positive for leukocyte common antigen (LCA) (33%), and only one patient was positive for CD 4, CD 10, CD 31, CD 45, human leukocyte antigen (HLA)-DR, lysozyme, and vimentin (33%). On molecular investigation, the gastric mass of only one patient (33.33%) contained a KIT mutation on exon 11. Emperipolesis was observed in one patient (33.33%) on histological examination. Our study provides an important overview of the available literature and gives insight into important diagnostic markers of HS when it occurs secondary to or concurrently with GIST. CI - Copyright (c) 2022, Rehman et al. FAU - Rehman, Shafi AU - Rehman S AD - Pathology, Shifa College of Medical Technology, Shifa Tameer-E-Millat University, Islamabad, PAK. FAU - Iqbal, Rashid AU - Iqbal R AD - Medical Biochemistry, Shifa College of Medical Technology, Shifa Tameer-E-Millat University, Islamabad, PAK. FAU - Sukaina, Mahnoor AU - Sukaina M AD - Medicine, Karachi Medical and Dental College, Karachi, PAK. FAU - Shaik Masthan, Shameera AU - Shaik Masthan S AD - Medicine, University of Louisville, Louisville, USA. FAU - Bint I Munir, Amna AU - Bint I Munir A AD - Medicine, Fatima Jinnah Medical University, Lahore, PAK. FAU - Iqbal, Yagana AU - Iqbal Y AD - Internal Medicine, Allama Iqbal Medical College, lahore, PAK. FAU - Qureshi, Muhammad H AU - Qureshi MH AD - Internal Medicine, Mayo Hospital, Lahore, PAK. FAU - Husnain, Ali AU - Husnain A AD - Medicine, Mayo Hospital, Lahore, PAK. FAU - Ghafoor, Sana AU - Ghafoor S AD - Internal Medicine, Shalimar Clinic, Islamabad, PAK. FAU - Ghafoor, Bushra AU - Ghafoor B AD - Research, University of Texas Southwestern Medical Center, Dallas, USA. AD - Medicine, Dera Ghazi Khan Medical College, Dera Ghazi Khan, PAK. AD - Internal Medicine, Nishtar Medical University, Multan, PAK. FAU - Nagarajan, Jai S AU - Nagarajan JS AD - Medicine, Sri Ramaswamy Memorial (SRM) Medical College Hospital and Research Centre, Chennai, IND. FAU - Pervaiz, Fariyal AU - Pervaiz F AD - Anatomy, Radiology, Cardiac Catheterization, Shifa College of Medical Technology, Shifa Tameer-E-Millat University, Islamabad, PAK. FAU - Haseeb Ul Rasool, Muhammad AU - Haseeb Ul Rasool M AD - Medicine, Icahn School of Medicine at Mount Sinai, Queens Hospital Center, New York City, USA. LA - eng PT - Journal Article PT - Review DEP - 20221228 PL - United States TA - Cureus JT - Cureus JID - 101596737 PMC - PMC9882698 OTO - NOTNLM OT - case reports OT - coexistence OT - gastrointestinal stromal tumors (gists) OT - histiocytic sarcoma OT - rare disease COIS- The authors have declared that no competing interests exist. EDAT- 2023/02/02 06:00 MHDA- 2023/02/02 06:01 PMCR- 2022/12/28 CRDT- 2023/02/01 01:47 PHST- 2022/12/28 00:00 [accepted] PHST- 2023/02/01 01:47 [entrez] PHST- 2023/02/02 06:00 [pubmed] PHST- 2023/02/02 06:01 [medline] PHST- 2022/12/28 00:00 [pmc-release] AID - 10.7759/cureus.33055 [doi] PST - epublish SO - Cureus. 2022 Dec 28;14(12):e33055. doi: 10.7759/cureus.33055. eCollection 2022 Dec.