Esophageal stenosis/atresia
Pyloric stenosis
Intestinal stenosis/atresia
Duodenal atresia
Malrotation ± volvulus
Incarcerated hernia
Meconium ileus/plug
Hirschsprung's disease
Imperforate anus
Enteric duplications
Intracranial bleed/mass
Hydrocephalus
Cerebral edema
Kernicterus
Urinary tract infection
Obstructive uropathy
Renal insufficiency
Viral illness
Acute gastroenteritis
Meningitis
Sepsis
Inborn errors of metabolism
Adrenal insufficiency
Congenital adrenal hyperplasia
Ileus
Gastroesophageal reflux disease
Necrotizing<unk> 
Milk allergy,<unk> 
GI perforation
Pyloric stenosis
Malrotation ± volvulus
Incarcerated hernia
Hirschsprung's disease
Enteric duplications
Intussusception
Foreign body
Bezoar
Meckel diverticulum
Intracranial hemorrhage/mass
Hydrocephalus
Cerebral edema (e.g. in DKA or cancer)
Urinary tract infection
Obstructive uropathy
Renal insufficiency
Viral illness
Acute gastroenteritis
Meningitis
Sepsis
Otitis media
Pneumonia
Pertussis
Hepatitis
Inborn errors of metabolism
Adrenal insufficiency
Renal tubular acidosis
DKA
Ileus
Gastroesophageal reflux disease
Post-tussive
Peritonitis
Drug overdose
Overfeeding
Starvation stools
Short bowel<unk> 
Cystic fibrosis
Celiac disease
Disaccharidase deficiency
Secretory neoplasms
Immunodeficiency
Inflammatory bowel disease
Antibiotic-associated diarrhea
Neonatal drug withdrawal
Toxins
Hemolytic uremic<unk>
Food protein-induced enterocolitis syndrome
Esophageal stenosis/atresia
Neutropenic enterocolitis 
Pyloric stenosis
Necrotizing enterocolitis
Intestinal stenosis/atresia
HIV diarrhea
Duodenal atresia