CPHON Radiation Therapy in Pediatric Oncology

Question 1

What is the standard SI unit used to measure absorbed radiation dose in radiation therapy?

Accepted Answer

Gray (Gy)

Answer

Roentgen

Answer

Sievert (Sv)

Answer

Rad

Question 2

Which type of radiation therapy delivers radiation from a source placed directly inside or adjacent to the tumor?

Accepted Answer

Brachytherapy

Answer

External beam radiation therapy (EBRT)

Answer

Proton beam therapy

Answer

Stereotactic radiosurgery (SRS)

Question 3

Which pediatric brain tumor most commonly requires craniospinal irradiation as part of its treatment?

Accepted Answer

Medulloblastoma

Answer

Pilocytic astrocytoma

Answer

Craniopharyngioma

Answer

Ependymoma

Question 4

What is the primary advantage of proton therapy over conventional photon radiation in pediatric oncology patients?

Accepted Answer

Reduced exit dose and significantly less radiation to healthy surrounding tissues

Answer

Lower treatment cost and wider availability

Answer

Shorter overall treatment duration

Answer

Higher tumor kill rate than photon therapy

Question 5

According to the CTCAE grading scale, which finding characterizes grade 2 radiation dermatitis?

Accepted Answer

Moderate to brisk erythema with patchy moist desquamation in skin folds

Answer

Faint erythema with dry desquamation

Answer

Confluent moist desquamation over areas of trauma

Answer

Skin necrosis requiring surgical intervention

Question 6

Which of the following is an acute side effect of radiation therapy directed to the head and neck region in a pediatric patient?

Accepted Answer

Mucositis

Answer

Secondary malignancy

Answer

Growth hormone deficiency

Answer

Cognitive processing deficits

Question 7

What is the most appropriate nursing recommendation for managing radiation-induced fatigue in a school-age child?

Accepted Answer

Schedule important activities during peak energy periods and encourage light exercise as tolerated

Answer

Enforce strict bed rest throughout the entire treatment course

Answer

Prohibit all physical activity to conserve energy reserves

Answer

Routinely administer stimulant medications to maintain alertness