MC4R and attention deficit-hyperactivity disorder: In ADHD cases but not ASD cases, we found deletions significantly enriched at 5 CNVRs-5q32 (ADRB2, SH3TC2), 10q26.11 (PRLHR), 1q25.1 (CACYBP), 7p22.1 (FSCN1), 18q21.32 (MC4R), although there is a trend toward significance at the FSCN1 locus for individuals with both ASD and ADHD.