Neonatology Book

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Abdominal Mass in Newborns

Aka: Abdominal Mass in Newborns, Neonatal Abdominal Mass
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  1. Causes: Genitourinary and Retroperitoneal
    1. Hydronephrosis (e.g. vesicoureteric reflux)
    2. Bladder enlargement
    3. Renal vein thrombosis
    4. Cystic Kidneys (e.g. Multicystic dysplastic Kidneys)
    5. Mesoblastic nephroma
    6. Hydrocolpos
    7. Ovarian Mass (e.g. Ovarian Cyst, teratoma)
    8. Adrenal hemorrhage
    9. Neoplasm (e.g. neuroblastoma, Rhabdomyosarcoma)
  2. Causes: Gastrointestinal
    1. See Hepatomegaly in Newborns
    2. See Splenomegaly in Newborns
    3. Gastrointestinal Duplications
    4. Meconium ileus
    5. Mesenteric or omental cyst
    6. Pyloric stenosis
    7. Volvulus
  3. Evaluation
    1. Abdominal XRay suggests Intestinal Obstruction
      1. Contrast radiographs
      2. Consult with pediatric surgery
    2. Abdominal XRay non-diagnostic
      1. Imaging: Abdominal Ultrasound or Abdominal CT
      2. Labs
        1. Complete Blood Count
        2. Serum Electrolytes
        3. Urinalysis
  4. References
    1. Cloherty (1991) Neonatal Care, p. 501-4
    2. Fuloria (2002) Am Fam Physician 65(2):265-70

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