患者，男，41岁，农民，新疆喀什人。2025年5月15日因“间歇性左侧腰痛3月”就诊于新疆维吾尔自治区喀什地区第二人民医院。患者有明确长期牧羊、宰羊及与羊类密切接触史。泌尿系B超提示左肾囊肿合并感染；腹部CT显示左肾类圆形低密度影，大小约14 cm × 11 cm，增强扫描病灶中心无强化，囊壁及壁结节呈轻度渐进性强化，肾盂及肾动脉受压，周围脂肪间隙清晰，胰尾受压推移，左肾强化幅度低于对侧。诊断为“左肾囊肿”。结合影像学表现及临床症状，于2025年5月21日在全麻下行后腹腔镜下左肾囊肿去顶减压术，术中见囊壁灰白、质韧，囊内有清亮囊液，囊腔中见子囊及幼虫，改行左肾棘球蚴内囊摘除术。囊壁组织及囊液经病理检查后，确诊为左肾细粒棘球蚴病。患者术后第2天开始口服阿苯达唑（400 mg，每日2次）。患者术后恢复良好，于术后第8天出院，嘱患者药物疗程不少于6个月并定期随访B超及肝功能，至今未见复发。

A 41-year-old male, farmer from Kashi, Xinjiang, was presented to Kashi Prefecture Second People’s Hospital on May 15, 2025, with complaints of “intermittent left-sided lumbago for 3 months”. The patient had a clear history of long-term sheep herding, slaughtering, and close contacts with sheep. B ultrasound of the urinary system displayed a left renal cyst complicated by infections. Abdominal CT scanning displayed a round, low-density lesion in the left kidney, measuring approximately 14 cm × 11 cm, and contrast-enhanced CT scans showed no enhancement in the center of the lesion, mild progressive enhancements in the cyst wall and cyst wall nodules, compressed renal pelvis and renal artery, clear surrounding fat space, displaced pancreatic tail by compression, and a lower enhancement intensity of the left kidney than that of the contralateral side. The patient has been diagnosed with a left renal cyst. Based on imaging findings and clinical symptoms, the patient underwent retroperitoneal laparoscopic unroofing and decompression of left renal cyst under general anesthesia on May 21, 2025. Intraoperative findings included a grayish-white, tough cyst wall, clear cyst fluids within the cyst, and daughter cysts and protoscoleces in the cystic cavity. The procedure was converted to excision of left renal Echinococcus cyst. Pathological examination of cyst wall tissues and cystic fluids confirmed the diagnosis of cystic echinococcosis in the left kidney. Oral administration of albendazole was given at a dose of 400 mg twice daily on day 2 post-operation. The patient recovered well and was discharged from hospital on day 8 post-operation. He was instructed to continue albendazole treatment for at least 6 months and to undergo regular follow-up with ultrasonography and liver function tests. No recurrence had been observed until now.