We report two patients with extrarenal retroperitoneal angiomyolipoma masquerading as perinephric liposarcoma. Patient 1 : A 66-year-old man was diagnosed with a retroperitoneal tumor near the right renal hilum on an abdominal computed tomography (CT) performed before surgery for gastric cancer. A diagnosis of extrarenal retroperitoneal angiomyolipoma was made on the basis of negative uptake of fluorine- 18 2-deoxy-2-fluoro-D-glucose positron emission tomography (18F-FDG PET)/CT. However, because the tumor was found to have gradually enlarged at 18 months afterward, he underwent resection of the extrarenal fat tissue together with the right kidney. Patient 2 : A 56-year-old man underwent abdominal ultrasound during a periodic medical examination, which revealed a right retroperitoneal tumor. Because of the findings in the contrast-enhanced CT and positive uptake of 18F-FDG PET/CT, he underwent resection of the extrarenal fat tissue together with the right kidney. The pathological examination of the two tumors confirmed extrarenal angiomyolipoma. The differential diagnosis of extrarenal retroperitoneal angiomyolipoma from retroperitoneal liposarcoma is difficult even with the use of 18F-FDG PET/CT.
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Urol Case Rep
January 2025
Department of Histopathology, Mt Meru Regional Referral Hospital, P.O Box 3092, Arusha, Tanzania.
Unlabelled: Renal angiomyolipoma is an uncommon benign tumor that mostly affects adults and is highly associated with tuberous sclerosis. It's very uncommon for it to affect adolescents. In this case, a 17-year-old male with abdominal pain and distension was diagnosed with sporadic giant renal angiomyolipoma.
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Department of Surgery, Jawaharlal Nehru Medical College, Medical College Road, Aligarh Muslim University, Aligarh 202002, India.
Angiomyolipoma is a benign mesenchymal tumour of kidney that consists of adipose tissue, muscle cells and blood vessels. Renal angiomyolipomas represent almost one percent of all renal tumours. We reported a case of a 50-year-old woman complaining of mild abdominal discomfort with no other symptoms and no remarkable medical history.
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Obstetrics and Gynecology, Postgraduate Institute of Medical Education and Research, Chandigarh, IND.
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Urology Department, Fundación Valle del Lili, Cali 760032, Colombia.
Angiomyolipomas are benign mesenchymal lesions often diagnosed incidentally, composed of adipose tissue, dysmorphic blood vessels, and smooth muscle. They are usually unilateral and symptomatic only when larger than 4 centimeters, posing a risk of spontaneous rupture and severe retroperitoneal hemorrhage. Treatment varies from conservative management to selective embolization or nephrectomy, depending on tumor size and patient condition.
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September 2024
Urology & Nephrology Center, Department of Urology, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, No. 158, Shangtang Road, Gongshu District, Hangzhou, 310014, Zhejiang, China.
With the continuous development of robot-assisted technology, Robot-assisted Laparoscopic Partial Nephrectomy (RALPN) has gradually become an optional method for the treatment of Hemorrhage secondary to angiomyolipoma (HSA). However, there are rare clinical reports of the primary RALPN for HSA. Therefore, this research aims to evaluate the efficacy and safety of primary RALPN for HSA.
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