Anomalies and Masses

A number of lesions (both of GU and non-GU origin) may present as a palpable abdominal mass in the infant or young child and require assessment in the emergen-

Table S.2. Classification of palpable abdominal masses

juxtarenal lesions

Midline lesions

Nongenitourinary lesions

Hydro-nephrosis

CMN

Urinary retention

Gastrointestinal duplications

Dilated upper-pole duplex

Neuro-blastoma

Renal ectopia

Hepatic lesions

MCDK

Wilms tumor

Urachal cyst

Pyloric stenosis

ADPKD

RCC

Ovarian cyst

Intestinal lymphatic malformations

ARPKD

Renal vein thrombosis

Hydrome-trocolpos

Omphalomesente-ric remnants

Cystic nephroma

Adrenal hemorrhage

Teratoma

Mid-abdominal wall defects

MCDKmulticystic dysplastic kidney, ARPKD autosomal recessive polycystic kidney disease, ADPKD autosomal dominant polycystic kidney disease, CMN congenital mesoblastic neph-roma, RCC renal cell carcinoma

MCDKmulticystic dysplastic kidney, ARPKD autosomal recessive polycystic kidney disease, ADPKD autosomal dominant polycystic kidney disease, CMN congenital mesoblastic neph-roma, RCC renal cell carcinoma cy department. Table 8.2 lists a broad spectrum of possible etiologies, categorized depending on their ultrasonographic appearance and location within the abdomen.

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