ImportanceDepression is a highly prevalent and debilitating disorder that often begins in adolescence. However, it remains unclear whether adults and adolescents with depression exhibit common or separate brain dysfunctions during reward processing.ObjectiveTo identify common and separable neurofunctional alterations during receipt of rewards and brain structure in adolescents and adults with depression.Data sourcesPubMed, Web of Science, and PsychInfo databases were screened for eligible depression studies published between January 2000 to January 2023.Study SelectionOriginal articles reporting whole-brain differences in adults and adolescents with depression compared to healthy controls.Data extraction and synthesisThe meta-analysis followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses PRISMA guidelines. A coordinate-based meta-analysis was employed using Seed-based d mapping with permutation of subject images (SDM-PSI) software. Behavioral, network, and molecular-genetic characterization were conducted by established platforms.Main Outcome(s) and Measure(s)Reward outcome alterations in adults and adolescents with depression compared with healthy controls.ResultsA total of 18 adult and 12 adolescent studies comprising 734 patients and 758 healthy controls were included in the meta-analysis (adults, mean [SD] age, 34.39, [9.61]; adolescents, mean [SD] age, 13.29, [1.56] years). Both age groups exhibited common activity decreases in the right striatum (putamen, caudate) and subgenual ACC (z= -4.213, P < .0025). Adults with depression showed decreased reactivity in the right putamen (z= -4.673, P < .0025) and subgenual ACC (z= -3.832, P < .0025) while adolescents with depression showed decreased activity in the left mid cingulate (z= -3.520, P < .0025), right caudate(z= -3.276, P < .0025) but increased reactivity in the right post central gyrus (z= 3.480, P < .0025). Further meta-analytic characterization revealed that the common regions coupled with dopaminergic reward processing systems, while the adolescent-specific regions were associated with the default mode network and social functions.Conclusions and RelevanceThis meta-analysis revealed shared (caudate) and separable (putamen and mid cingulate cortex) reward-related alterations in adults and adolescents with depression. The findings suggest age-specific neurofunctional alterations and stress the importance of adolescent-specific interventions that target social functions.Key PointsQuestionDo adults and adolescents with depression exhibit common or distinct brain dysregulations during rewarding experiences?FindingsThe present neuroimaging meta-analysis including data from 1,492 participants revealed that depressed adults and adolescents exhibited decreased subgenual anterior cingulate and striatal reward reactivity while adolescents specifically showed reduced mid-cingulate and enhanced postcentral reactivity. Common regions were characterized by connectivity with dopamine-related reward processing circuits, while the adolescent-specific region showed a strong association with social processes and the default mode network.MeaningFindings suggest specific dysfunctions in adolescent depression, emphasizing the need for tailored interventions that target social domains.