PMID- 32657547 OWN - NLM STAT- MEDLINE DCOM- 20210930 LR - 20210930 IS - 1097-0339 (Electronic) IS - 1097-0339 (Linking) VI - 48 IP - 9 DP - 2020 Sep TI - A comprehensive diagnosis of a desmoplastic small round cell tumor of unusual location based on fine-needle aspiration cytology: Report of a case arising in the parotid gland and review of the literature. PG - 827-832 LID - 10.1002/dc.24542 [doi] AB - Desmoplastic small round cell tumor (DSRCT) is rare and a highly aggressive neoplasm that typically involves the soft tissues of the abdomen or pelvis in children or young adults, showing a male predilection. Although it can occurs over a wide age range, the peak incidence is in the third decade of life. DSRCT usually shows widespread abdominal serosal involvement, and overall patient survival is poor. On the other hand, extra-abdominal DSRCT is very rare. DSRCT in major salivary glands has been reported, but it is extremely rare. In the majority of reported series diagnosis is made by the histological analysis of FFPE tissues together with immunohistochemistry (IHC) and molecular analysis, particularly the demonstration of chromosomal translocation involving EWSR1. Very few cases have been diagnosed so far by Fine Needle Aspiration (FNA) cytology. Moreover ancillary studies have been performed in all reported cases in FFPE samples. There is still controversy and lack of consensus regarding the suitability of cytological samples especially smears for immunocytochemical (ICC) and fluorescence in situ hybridization (FISH), what makes its standardization difficult. We report a case of a primary DSRCT of parotid gland in a 17-year-old male diagnosed by FNA cytology. The cytomorphological diagnosis was coupled with ICC and FISH analysis performed on stained smears. We emphasize the feasibility and reliability of cytological smears for the application of immunocytochemical and molecular techniques. CI - (c) 2020 Wiley Periodicals LLC. FAU - Lozano, Maria D AU - Lozano MD AUID- ORCID: 0000-0002-6796-9380 AD - Department of Pathology, Clinica University of Navarra, Pamplona, Spain. FAU - Landa, Ana AU - Landa A AD - Medical Oncology, University Hospital of San Sebastian, San Sebastian, Spain. FAU - Tobar, Laura G AU - Tobar LG AD - Department of Pathology, Clinica University of Navarra, Pamplona, Spain. FAU - De Andrea, Carlos AU - De Andrea C AD - Department of Pathology, Clinica University of Navarra, Pamplona, Spain. FAU - Larrache, Javier AU - Larrache J AD - Department of Radiology, Clinica University of Navarra, Pamplona, Spain. FAU - Echeveste, Jose I AU - Echeveste JI AD - Department of Pathology, Clinica University of Navarra, Pamplona, Spain. FAU - Paricio, Jose J AU - Paricio JJ AD - Department of Pathology, Clinica University of Navarra, Pamplona, Spain. FAU - Sanchez, Beatriz AU - Sanchez B AD - Medical Oncology, University Hospital of San Sebastian, San Sebastian, Spain. FAU - Medina, Andrea AU - Medina A AD - Medical Oncology, University Hospital of San Sebastian, San Sebastian, Spain. FAU - Paisan, Ana AU - Paisan A AD - Medical Oncology, University Hospital of San Sebastian, San Sebastian, Spain. LA - eng PT - Case Reports PT - Journal Article DEP - 20200713 PL - United States TA - Diagn Cytopathol JT - Diagnostic cytopathology JID - 8506895 SB - IM MH - Adolescent MH - Biopsy, Fine-Needle/methods MH - Cytodiagnosis/methods MH - Desmoplastic Small Round Cell Tumor/*diagnosis/*pathology MH - Humans MH - Immunohistochemistry/methods MH - Male MH - Parotid Gland/*pathology OTO - NOTNLM OT - DSRCT parotid OT - FISH OT - FNA cytology OT - ICC OT - stained smears EDAT- 2020/07/14 06:00 MHDA- 2021/10/01 06:00 CRDT- 2020/07/14 06:00 PHST- 2020/04/21 00:00 [received] PHST- 2020/06/04 00:00 [revised] PHST- 2020/06/18 00:00 [accepted] PHST- 2020/07/14 06:00 [pubmed] PHST- 2021/10/01 06:00 [medline] PHST- 2020/07/14 06:00 [entrez] AID - 10.1002/dc.24542 [doi] PST - ppublish SO - Diagn Cytopathol. 2020 Sep;48(9):827-832. doi: 10.1002/dc.24542. Epub 2020 Jul 13.