A 1-Month-Old Boy Is Brought to the Office for Evaluation

A 1-month-old boy is brought to the office for evaluation of blood-streaked stools.  The patient was born at full term via spontaneous vaginal delivery and has been breastfed exclusively.  The mother says he usually has 5 yellow, seedy stools daily, but over the past 3 days they have become loose and streaked with blood and mucus.  The infant nurses every 2-3 hours but spits up a small amount of breast milk with every feed.  The mother recently completed a course of antibiotics for mastitis but otherwise takes no daily medications and has a regular diet.  The patient's weight, length, and head circumference have been tracking along the 40th percentile.  Vital signs are normal.  The infant appears well.  The abdomen is soft and nontender.  No fissures are noted on anal examination.  A fecal occult blood test is positive.  Which of the following is the most likely cause of this patient's condition?

A) Clostridioides difficile colitis
B) Food protein-induced allergic proctocolitis
C) Intussusception
D) Lactose intolerance
E) Malrotation with midgut volvulus
F) Meckel diverticulum

Correct Answer:

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