SYP and mucinous adenocarcinoma: In a study on three breast neoplasms from three Japanese female patients, ages 42, 58, and 64, Kawasaki and Kaira found that INSM1 was expressed strongly and diffusely in all three cases (1 NET, 1 mucinous carcinoma, and 1 neuroendocrine carcinoma in situ), while CgA and SYP were negative in all three cases [62].