Any microcephaly, short stature, and impaired glucose metabolism in which the cause of the disease is a mutation in the PPP1R15B gene. The disease is MONDO_0014785 (microcephaly, short stature, and impaired glucose metabolism 2). Also known as: MSSGM2, PPP1R15B microcephaly, short stature, and impaired glucose metabolism, microcephaly, short stature, and impaired glucose metabolism 2; MSSGM2, microcephaly, short stature, and impaired glucose metabolism caused by mutation in PPP1R15B, microcephaly, short stature, and impaired glucose metabolism type 2.