PMID- 32342940 OWN - NLM STAT- MEDLINE DCOM- 20210205 LR - 20210205 IS - 0126-8635 (Print) IS - 0126-8635 (Linking) VI - 42 IP - 1 DP - 2020 Apr TI - Metastatic alveolar rhabdomyosarcoma on the fine-needle aspiration cytology of cervical lymph node in an elderly patient, with FISH confirmation: A case report. PG - 115-119 AB - INTRODUCTION: Alveolar rhabdomyosarcoma (RMS) usually occurs in adolescents and young adults, and most frequently arises in the extremities. CASE REPORT: We present a rare case of metastatic alveolar RMS from a nasal primary to cervical lymph nodes (LNs) in an elderly patient, diagnosed on the fine-needle aspiration (FNA) biopsy. Smears showed malignant round cells featuring focal rhabdoid appearance, with rhabdomyoblastic differentiation further supported by immunocytochemical stains. Diagnosis of alveolar RMS was confirmed by fluorescence in situ hybridization (FISH) identifying FOXO1 gene involvement with dual colour break-apart probes at locus 13q14. DISCUSSION: The differential diagnosis for a small round blue cell tumour in the elderly generally includes metastatic small cell carcinoma, lymphoma, malignant melanoma, RMS, desmoplastic small round cell tumour and Ewing's sarcoma/primitive neuroectodermal tumour. Subtle morphological analysis and expression pattern of immunostaining for skeletal muscle differentiation led to the diagnosis of RMS. Cytogenetic testing on the FOXO1 gene rearrangement helps definite subtyping of alveolar RMS. FAU - Zhao, Z AU - Zhao Z AD - Singapore General Hospital, Division of Pathology, Department of Anatomical Pathology, Singapore. sathiyamoorthy.selvarajan@singhealth.com.sg. FAU - Takano, A AU - Takano A FAU - Lim, A S T AU - Lim AST FAU - Lim, T H AU - Lim TH FAU - Selvarajan, S AU - Selvarajan S LA - eng PT - Case Reports PT - Journal Article PL - Malaysia TA - Malays J Pathol JT - The Malaysian journal of pathology JID - 8101177 RN - 0 (Biomarkers, Tumor) SB - IM MH - Aged MH - Biomarkers, Tumor/analysis MH - Biopsy, Fine-Needle MH - Cytodiagnosis MH - Female MH - Humans MH - In Situ Hybridization, Fluorescence MH - Lymph Nodes/pathology MH - Lymphatic Metastasis/*pathology MH - Nasal Cavity/*pathology MH - Nose Neoplasms/*diagnosis/pathology MH - Rhabdomyosarcoma, Alveolar/*diagnosis/pathology EDAT- 2020/04/29 06:00 MHDA- 2021/02/07 06:00 CRDT- 2020/04/29 06:00 PHST- 2020/04/29 06:00 [entrez] PHST- 2020/04/29 06:00 [pubmed] PHST- 2021/02/07 06:00 [medline] PST - ppublish SO - Malays J Pathol. 2020 Apr;42(1):115-119.