This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
Infantile polycythemia is seen in - 
Select and explain. 
A. Cerebellar haemangioma, B. Retinoblastoma, C. Hepatoblastoma, D. All
A: Cerebellar haemangioma
Answer: A: Cerebellar haemangioma 
Explanation: Ans. is 'a' i.e., Cerebellar haemangioma In pediatrics, polycythemia is usually secondary to chronic hypoxia. Secondary causes of pediatric polycythemia o Cyanotic congenital hea disease o Brain tumor (Cerebellar hemangioma) o Chronic pulmonary disease Cystic fibrosis o Cushing disease o High altitude o Hydronephrosis o Renal tumor Causes of neonatal polycythemia o Twin-twin transfusion o Trisomy 93, 18 or 21 o Maternal-fetal transfustion o Adrenogenital syndrome o Chronic intrauterine hypoxia o Neonatal Graves disease Delayed clamping of umblical cord o Hypothyroidism Infant of diabetic mother o Beckwith-wiedemann syndrome Infant of a hypeensive mother or these on propranolol