In this patient, tumor 1 or 3 and tumor 2 had one common mutation (NTRK1 c.288-3C > A); tumors 1 and 3 had three common mutations (NTRK1 p. G137V, NTRK1 c.288-3C > A, and PIK3CA p. K111N). The gene discussed is PIK3CA; the disease is neoplasm.