What condition is characterized by bilious emesis and crampy abdominal pain in the first month of life?

The condition characterized by bilious emesis and crampy abdominal pain in the first month of life is malrotation with volvulus. This condition occurs when the intestines do not properly rotate during fetal development, leading to an abnormal attachment of the bowel. When volvulus, or twisting of the bowel, occurs, it can result in obstruction and reduced blood flow to the affected segment of the intestines.

Bilious emesis, or vomiting of greenish bile, is a critical sign of intestinal obstruction, specifically in neonates. The presence of crampy abdominal pain indicates significant gastrointestinal distress. In malrotation with volvulus, the rapid onset of these symptoms often requires prompt diagnosis and surgical intervention to prevent serious complications, such as bowel necrosis.

In contrast, other conditions listed would not typically present with bilious vomiting and crampy abdominal pain during the first month of life in the same manner. For instance, pyloric stenosis generally leads to non-bilious projectile vomiting due to gastric outlet obstruction occurring typically in infants aged 3 to 12 weeks. Necrotizing enterocolitis is more common in premature infants and presents with other signs such as abdominal distension and bloody stools, rather than isolated bilious vomiting. Gastroesophageal