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Abdominal mass in older child: renal �
Wilms, hydronephrosis;
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Abdominal mass in older child:GI �
appendiceal abscess, intussusception, neoplasm;
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Abdominal mass in older child:RP �
neuroblastoma;
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Abdominal mass in older child:genital �
ovarian cyst, teratoma, hydrometrocolpos;
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Abdominal mass in older child:hepatobiliary �
hepatoblastoma, HCC, mesenchymal hamartoma;
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Abdominal mass in older child:VP shunt �
CSFoma
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Gastric filling defect:
FB (most common), bezoar, duplication, ectopic pancreas
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gastric Thick folds:
enteritis, lymphoma, leukemia, Henoch-Schonlein purpura, HUS, coagulopathies
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GI bleed:
Meckel�s, juvenile polyps, IBD
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Liver lesions:
cysts, hemangioendothelioma, mesenchymal hamartoma, hepatoblastoma, HCC, mets from Wilms or neuroblastoma
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Fatty liver:
chronic protein malnutrition (most common), CF, glycogen storage disease, hepatitis, chemotherapy, steroids, hyperalimentation
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Cholelithiasis:
sickle cell, thalassemia, CF, HPT, premature infants with HMD
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Congenital GU anomalies:
malrotation, ectopic kidney, horseshoe kidney, cross-fused ectopia, renal hypoplasia, ureteral duplication, ureterocele, UPJ obstruction, UVJ obstruction, megaureter, bladder extrophy, prune belly, PUV, hypospadia, caudal regression
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Cystic renal masses:
hydronephrosis, ARPKD, MCDK, multilocular cystic nephroma, VHL, TS, cystic Wilms
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Hydronephrosis:
most common abdominal mass in neonates; UPJ obstruction, UVJ obstruction, ectopic ureterocele, PUV, prune belly
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Solid renal mass:
Wilms (children), mesoblastic nephroma (newborns), nephroblastomatosis, AML, lymphoma, leukemia, neuroblastoma
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Adrenal mass:
neonatal hemorrhage (common), neuroblastoma, other RP masses (Wilms, hydronephrotic upper pole, RP adenopathy, hepatoblastoma, splenic mass)
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Cystic structure in or near bladder wall:
Hutch diverticulum, urachal remnant, ureterocele, megaureter, ovarian cyst, mesenteric cyst
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Presacral mass:
rectal duplication, anterior meningocele, teratoma, neuroblastoma
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Interlabial mass:
ectopic ureterocele, periurethral cysts, rhabdomyosarcoma of vagina, prolapsed urethra, imperforate hymen
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