Primary epithelioid rhabdomyosarcoma of the stomach: a case report and review of literature

• Published in: Diagnostic pathology Vol. 14; no. 1; p. 137
• Main Authors: Wang, Yangkun, Guo, Pei, Zhang, Zhishang, Jiang, Runde, Li, Zuguo
• Format: Journal Article
• Language: English
• Published: England BioMed Central Ltd 23.12.2019; BioMed Central; BMC
• Subjects: Actin; Age; Bladder; Case Report; Case reports; CD56 antigen; Clinicopathological features; Cytoplasm; Desmin; Epithelioid rhabdomyosarcoma; Gastric cancer; Gastric tumor; Gastrointestinal diseases; Immunohistochemistry; Literature reviews; Melanoma; Morphology; Muscle proteins; Myogenin; Necrosis; Parotid gland; Rhabdomyosarcoma; Septum; Skin; Skin cancer; Stomach; Tumor cells; Tumors; Immunohistochemistry; Clinicopathological features; Epithelioid rhabdomyosarcoma; Gastric tumor
• ISSN: 1746-1596; 1746-1596
• DOI: 10.1186/s13000-019-0917-y

Epithelioid rhabdomyosarcoma is a rare tumor that generally occurs in the bladder, the parotid gland, or the skin of the neck. We describe an unusual case of primary epithelioid rhabdomyosarcoma of the stomach and review the literature. A 64-year-old woman presented with a lesion at the gastroesophageal junction. Histopathological examination showed irregularly sized round cells with low cytoplasmic content and eccentric nuclei. Mitotic figures were present. Fibrovascular septa and areas of necrosis were observed between tumor cells. Tumor cells were strongly positive for MyoD1, desmin, and myogenin, and weakly positive for actin, CD56, and PGP9.5. The ki-67 index was ≥90%. Primary epithelioid rhabdomyosarcoma of the stomach is extremely rare. Better awareness of this entity is necessary for early diagnosis and treatment.