Brachymorphism-onychodysplasia-dysphalangism (BOD) syndrome is a very rare condition that affects the development of the bones and nails. People with this syndrome typically have short stature and unique facial features, including a wide mouth and broad nose. The syndrome is also marked by underdevelopment (hypoplasia) of the fifth digits and abnormal nail formation. In addition to these physical characteristics, individuals with BOD syndrome may experience mild intellectual challenges. The condition has similarities with Coffin-Siris syndrome, and it is suggested that these two conditions might be allelic variants, meaning they could be related through changes in the same gene or region of the genome.

Common symptoms include short stature, underdeveloped fifth digits with tiny, dysplastic nails, and distinctive facial features such as a wide mouth and broad nose. In some cases, there may also be mild intellectual disability.

The exact causes of BOD syndrome are not well understood. There is a suggestion that the syndrome may be related to genetic variations similar to those seen in Coffin-Siris syndrome. However, specific genetic markers and detailed risk factors have not been clearly defined.