3-M syndrome: endocrinologist's view of a rare genetic disease. Case report

3-M syndrome is a rare hereditary disease with an autosomal recessive type of inheritance, characterized by intrauterine and severe postnatal growth retardation, phenotypic and radiological features with no intellectual disability. A little more than 200 cases of this syndrome have been described in the world. 3-M syndrome is the only disease to date that is associated with pathogenic biallelic variants in the genes CCDC8, CUL7, OBSL1. Short stature is the main clinical manifestation of 3-M syndrome. Until now, the issue of treating short stature with growth hormone remains controversial due to the small number of patients with this disease and the lack of large-scale clinical studies.