During a Routine Examination of a 3-Year-Old Child, the Pediatrician

Multiple Choice

During a routine examination of a 3-year-old child, the pediatrician notes that the color of the pupil is white and that the child is cross-eyed. She asks the child's father if there are any cases of retinoblastoma in the family, and when the answer is in the affirmative she calls in a pediatric ophthalmologist. The ophthalmologist knows that retinoblastoma is due to the mutation of the Rb gene (retinoblastoma gene) and that it is a recessive trait. Retinoblastoma can metastasize to the brain via the

A) optic nerve
B) superior division of the oculomotor nerve
C) trochlear nerve
D) abducent nerve
E) inferior division of the oculomotor nerve