Which chromosomal abnormality is often characteristic of infantile ALL?

Which chromosomal abnormality is often characteristic of infantile ALL?

You are examining an infant with multiple cutaneous hemangiomas; you suspect involvement of internal organs. The MOST common site of visceral involvement by hemangiomas is

Which of the following chromosomal abnormalities of childhood ALL carries the highest risk of relapse despite intensive chemotherapy?

Which of the following is MOST likely considered a risk factor for extraneural metastasis in primary brain tumors?

During a routine examination of a 10-mo-old male infant, you find a white pupillary reflex of the right eye; the eye movements are normal. You suspect retinoblastoma. Of the following, the BEST confirmatory diagnostic evaluation of this infant is