Oncology

Question 1

the most common childhood malignanc

Answer 1

ALL

Question 2

An embryonal tumor of neural crest origin. More than half of patients are

Answer 2

Neuroblastoma

Question 3

Elevated 24-hour urinary catecholamines (VMA and HVA).

May cross midline

Answer 3

Neuroblastoma

Question 4

1. associated with aniridia and hemihypertrophy and does not cross the midline.
2. associated with opsoclonus/myoclonus and may cross the midline.

Answer 4

Wilms’ tumor is associated with aniridia and hemihypertrophy and does not cross the midline.

Neuroblastoma is associated with opsoclonus/myoclonus and may cross the midline.

Question 5

Presents as an asymptomatic, nontender, smooth abdominal mass that does not usually cross the midline.
Abdominal pain, fever, hypertension, and microscopic or gross hematuria are seen.

Answer 5

Wilms’ Tumor

Question 6

1. Onion skinning, mid shaft of long bones

2. Metaphysis of long bones, sunburst appearance

Answer 6

1. Ewing’s sarcoma

2. osteosarcoma