Baseline Anxiety Trajectories in Pediatric Radiation Therapy Observational Cohort

Inclusion Criteria:

To be eligible to participate in this study, an individual must meet all of the following criteria:

* Provision of signed and dated informed consent from a parent or legal guardian.
* For children age 7 and older, provision of informed assent in addition to parental consent, consistent with institutional guidelines.
* Stated willingness of parent/guardian and child (as appropriate) to comply with study procedures (i.e., observation during scheduled radiation therapy appointments).
* Male or female, ages 2-12 years.
* Scheduled to undergo radiation therapy at MD Anderson Cancer Center.

Exclusion Criteria:

An individual who meets any of the following criteria will be excluded from participation in this study:

* Has already completed the simulation session for radiation therapy prior to enrollment.
* Declines parental consent or, when applicable, child assent.