Abstract
Cystic nephroma is a rare, benign multicystic lesion of the kidney. This tumor occurs both in children and in adults. In children, it is highly prevalent in males; in adults, it is more frequent in women. The term “cystic nephroma” represents two apparently different entities: pediatric cystic nephroma, a benign form thought to originate from metanephric tissue, and adult cystic nephroma, considered as a lesion of mixed epithelial stromal tumor. The clinical presentation may be a palpable mass or nonspecific symptoms such as abdominal pain, hematuria, and urinary tract infections. In this review, we summarize the ultrasound imaging features of cystic nephroma and describe the characteristics of the most common renal cystic lesions and the differential diagnosis of cystic nephroma with other renal cystic lesions.
Highlights
Cystic nephroma (CN) is a rare, benign multicystic lesion of the kidney [1]
We describe US imaging features of CN based on recent studies
The second case was a 5-year-old girl with diagnosis of Sertoli–Leydig cell tumor with a cystic renal lesion localized in the right kidney with the size of 2.8 × 2.3 × 2 cm at US and computed tomography (CT) examinations
Summary
Cystic nephroma (CN) is a rare, benign multicystic lesion of the kidney [1]. This tumor has two peaks of distribution: two-thirds occur in children between 3 months and 2 years, with a higher prevalence in males; and one-third occurs in adults over the age 30, with a female predominance. Renal US showed a normal right kidney and an anechoic lesion with a diameter of 7 mm without internal vascularization at the lower pole of the left kidney. At 5-month follow-up, US showed an increase in size of the cystic lesion and the presence of a second complex cyst with internal septa on the same kidney.
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