found that there were genetic overlaps between PD, UC (BTNL2, HLA, GUCY1A3, and TRIM10), and CD (LRRK2, MROH3P, MAPT, RSPH6A, HLA, SYMPK, and CCNY) (48), indicating that these three have partially common genetic pathways. The gene discussed is LRRK2; the disease is Parkinson disease.