This information is provided by the National Institutes of Health (NIH) Genetic and Rare Diseases Information Center (GARD).
Renpenning syndrome is a genetic condition which occurs mostly in males. Signs and symptoms include the following: developmental delay, a small head (microcephaly), short stature, and distinctive facial features. Approximately two-thirds of individuals with Renpenning syndrome have moderate to severe intellectual disability. Additional features may include heart defects, muscular atrophy, cleft palate, and eye abnormalities.  Renpenning syndrome is caused by mutations in the PQBP1 gene and is inherited in an X-linked recessive manner.  Management involves early intervention by trained therapists along with treatment of any associated features. 
For more information, visit GARD.