Which of the following best describes a neuroblastoma?

Choice A: Distended neck veins are not a clinical manifestation of pyloric stenosis, which is a condition that causes the narrowing of the pylorus, which is the opening between the stomach and the small intestine. Distended neck veins are a sign of increased venous pressure, which can occur in conditions that affect the right side of the heart or cause fluid overload.

Choice B: Rigid abdomen is not a clinical manifestation of pyloric stenosis, but rather a sign of peritonitis, which is inflammation of the peritoneum, which is the membrane that lines the abdominal cavity. Peritonitis can be caused by infection, perforation, or trauma to any abdominal organ. A rigid abdomen indicates severe pain and inflammation in the abdominal cavity.

Choice C: Projectile vomiting is a clinical manifestation of pyloric stenosis, as it indicates forceful expulsion of stomach contents due to obstruction at the pylorus. Projectile vomiting can occur shortly after feeding and may contain undigested milk or formula. Projectile vomiting can cause dehydration, electrolyte imbalance, or weight loss.

Choice D: Red currant jelly stools are not a clinical manifestation of pyloric stenosis, but rather a sign of intussusception, which is a condition that causes telescoping of one segment of bowel into another. Intussusception can cause obstruction and ischemia of the bowel and lead to bleeding and necrosis. Red currant jelly stools indicate blood and mucus in the stool.

Choice A: A barking cough is not a finding that indicates that the treatment has been effective, but rather a symptom of acute laryngotracheobronchitis, which is also known as croup. Croup is a condition that causes inflammation and narrowing of the upper airway and produces a characteristic barking or seal-like cough. A barking cough may persist for several days after the onset of croup and does not reflect the severity of the airway obstruction.

Choice B: Decreased stridor is a finding that indicates that the treatment has been effective, as stridor is a sign of airway obstruction caused by acute laryngotracheobronchitis. Stridor is a high-pitched, noisy breathing sound that occurs when the air passes through the narrowed airway. Stridor may be inspiratory, expiratory, or biphasic,
depending on the level of obstruction. Decreased stridor means that the airway is less obstructed and the child can breathe more easily.

Choice C: Improved hydration is not a finding that indicates that the treatment has been effective, but rather a goal of treatment for acute laryngotracheobronchitis. Dehydration can worsen the symptoms and complications of croup by thickening the mucus and increasing the risk of infection. Improved hydration can help thin out the mucus and prevent dehydration. Hydration can be improved by encouraging oral fluids, administering intravenous fluids, or providing humidified air.

Choice D: Decreased temperature is not a finding that indicates that the treatment has been effective, but rather a possible outcome of treatment for acute laryngotracheobronchitis. Fever may or may not be present in croup, depending on the cause and severity of the condition. Fever can be caused by viral or bacterial infection, inflammation, or dehydration. Decreased temperature can indicate that the infection or inflammation is resolving or that the dehydration is corrected.