The acute effects of radiation therapy (occurring less than 3 months after therapy begins) are usually related to the area of the body being irradiated. Of the following, the MOST severe acute reaction is

Correct Answer: C

Rationale: Cerebral edema is a severe and potentially life-threatening acute reaction to radiation therapy, particularly in brain irradiation. Other effects, though significant, are generally less severe.

Correct Answer: C

Rationale: Massive pleural effusion causes decreased tactile vocal fremitus due to fluid accumulation, which dampens sound transmission. Other findings include tracheal deviation, dullness to percussion, and potential infectious complications.

Correct Answer: D

Rationale: All statements are true; CNS leukemia has a poor prognosis, causes increased ICP, is prone to relapse, and can lead to cranial nerve palsies.

Correct Answer: C

Rationale: Jaundice with a bilirubin level >12 mg/dL in a full-term infant is common and may not require investigation unless other risk factors are present. The other conditions warrant further investigation.

Correct Answer: C

Rationale: Studies indicate that around 21-30% of children with allergic rhinitis experience remission as they grow older, likely due to immune system maturation.