Contributed by
ZAS
stefanie devriendt, and dirk vervloessem.
History
Newborn infant, female, born at 39 weeks. Prenatal diagnosis of a voluminous cyst in the right flank, 4.4 x 2.8 x 4.7 cm. After birth, clinical examination was unremarkable, no abdominal pain was found. Sonography was performed at 3 days old and showed a large cystic mass with echogenic wall and a marked fluid-debris level. The cyst was found in the left flank and measured 4.9 cm at the largest diameter. It was found anterior of the psoas muscle, at the level of the left kidney. The caudal border was close to the left ovary, but with compression the distance between both enlarged. The left ovary showed some small ovarian cysts; the right ovary was not found. No free fluid was seen. Normal appearance of other intra-abdominal organs.
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What is the diagnosis?
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