Research on adolescents and young adults (AYAs) with cancer has flourished over the past decade, underscoring the unique medical and psychosocial needs of this vulnerable group. A cancer diagnosis during adolescence and young adulthood intersects with the developmental trajectory of AYAs, derailing critical physical, social, and emotional development. AYAs face these abrupt life changes needing age-appropriate information and resources to offset these challenges. Greater attention is needed to address AYA-specific concerns on reproductive and sexual health, financial security and independence, emotional well-being, social support, and end-of-life care. If these unique needs are unaddressed, this can adversely affect AYAs’ health care engagement and overall quality of life, increasing their risk for cancer-related morbidity and early mortality. In particular, health care decisions made during treatment have important implications for AYA patients’ future health. Oncology clinicians are well positioned to address AYA patients’ concerns by anticipating and addressing the challenges this age group is likely to face. In this paper, we explore several core topics that affect AYAs’ quality of life and that can be challenging to address. Starting from the moment of diagnosis, through cancer treatment and post-treatment survivorship, and into end of life, each section highlights critical developmental-centric life domains that are affected by the cancer experience. Specifically, we discuss resources, tools, and strategies to navigate these challenging conversations. Taking a risk-reduction approach that invites two-way communication and facilitates referral to age-appropriate resources would help destigmatize these experiences and, in turn, would support the provision of compassionate and effective age-concordant care to this vulnerable group.