Background: Patient-reported outcomes (PROs) that assess health-related quality of life (HRQoL) are increasingly important components of cancer care and research that have been infrequently used in sub-Saharan Africa (SSA). We aimed to longitudinally measure HRQoL among pediatric lymphoma patients in Malawi. Methods: We administered the Chichewa Pediatric Patient-Reported Outcome Measurement Information System Pediatric (PROMIS)-25 at diagnosis, active treatment, and follow-up among pediatric lymphoma patients in Lilongwe, Malawi. Mean scores were calculated for the six PROMIS-25 HRQoL domains (Mobility, Anxiety, Depressive Symptoms, Fatigue, Peer Relationships, and Pain Interference) using the PROMIS scoring manual. Results: Seventy-five children completed PROMIS-25 surveys at diagnosis, 35 (47%) during active treatment, and 24 (32%) at follow-up. The majority of patients died (n= 37, 49%) or were lost-to-follow-up (n=8, 11%). Most (n=51, 68%) were male, median age was 10 (IQR 8-12), 48 (66%) presented with advanced Stage III/IV, 61 (81%) were diagnosed with Burkitt lymphoma and 14 (19%) had Hodgkin lymphoma. At diagnosis, HRQoL was poor across all domains, except for Peer Relationships. Improvements in HRQoL during active treatment and follow-up exceeded the minimally important difference. Poor Lanksy performance status ≤ 70 and Pain Intensity = 10 at diagnosis were associated with increased mortality risk and worse survival. Conclusions: Our experience suggests incorporating assessments of HRQoL via PROs in oncology care is feasible in SSA, can provide prognostic information, and generates clinically meaningful data to inform supportive care interventions. Further, PROs offer an opportunity to include patient voices and prioritize holistic patient-centered care even in low-resource settings.