Intramuscular hydatid cyst of thigh masquerading as a soft tissue tumour diagnosed by fine needle aspiration cytology

IF 0.7
K. Amita, T. Rajini, M. Sanjay, M. Abhishek, K. Prashantha
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引用次数: 1

Abstract

Abstract Introduction. Hydatid cyst, caused by Echinococcus granulosa, occurs rarely in the musculoskeletal region. Most of the time, clinically and radiologically it is diagnosed as a soft tissue tumor, benign or malignant. There are a few case reports of hydatid cyst presenting as an intramuscular thigh mass, which has been diagnosed at fine needle aspiration cytology (FNAC). Accurate pre-operative diagnosis is essential in view of specific therapeutic options for this disease. Here we report a case of hydatid cyst occurring in an unusual location (thigh) and masquerading as a soft tissue tumour, diagnosed at FNAC. Case Report. 56-year-old male patient presented with gradually increasing swelling of the left thigh since 3 years. On examination, there was a firm non-tender 25 × 20 cm swelling on the posterior aspect of left thigh extending from the gluteal region to five cm above the knee joint. An ultrasound diagnosis of a soft tissue tumor was made. At FNAC, fluid was aspirated and smears showed granulomas along with multiple hyaline acellular membrane-like fragments, few showing vague laminations. A diagnosis of hydatid cyst was made at FNAC which was corroborated at histopathology. Conclusion. Intramuscular hydatid cyst of the thigh is a very rare manifestation. The possibility of hydatid cyst should be considered while aspirating any soft tissue mass lesion, especially when fluid is obtained and microscopy shows acellular hyaline membrane-like material, even when fewer laminations are noted.
细针吸细胞学诊断大腿肌内包虫病为软组织肿瘤
摘要介绍。由细粒棘球绦虫引起的包虫病,很少发生在肌肉骨骼区域。大多数时候,临床和放射学诊断为软组织肿瘤,良性或恶性。有少数病例报告,包虫囊肿表现为大腿肌肉内肿块,已被诊断为细针穿刺细胞学(FNAC)。准确的术前诊断是必要的,鉴于具体的治疗方案,这种疾病。这里我们报告一例发生在不寻常的位置(大腿)并伪装成软组织肿瘤的包虫囊肿,在FNAC诊断。病例报告:56岁男性患者,3年来左大腿肿胀逐渐加重。检查时,左大腿后侧从臀区延伸至膝关节上方5cm处有一个坚定而无痛的25 × 20 cm肿胀。超声诊断为软组织肿瘤。FNAC吸液,涂片示肉芽肿伴多个透明脱细胞膜样碎片,少数可见模糊层状。FNAC诊断为包虫囊肿,组织病理学证实。结论。大腿肌内包虫病是一种非常罕见的表现。在抽吸任何软组织肿块病变时应考虑包虫囊肿的可能性,特别是当获得液体并且显微镜显示无细胞透明膜样物质时,即使注意到较少的层状。
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