King Denborough syndrome

A myopathy that is characterized by distinctive facies, ptosis, downslanted palpebral fissures, widely spaced eyes, epicanthal folds, low-set ears, malar hypoplasia, micrognathia, high-arched palate, clinodactyly, single palmar crease, pectus excavatum, winging of the scapulae, lumbar lordosis, and mild thoracic scoliosis. Pathogenic variants in RYR1 have been found in some individuals with King-Denborough syndrome.

DNA ligase IV deficiency

A combined T cell and B cell immunodeficiency that has_material_basis_in a mutation in the LIG4 gene, a DNA ligase, encoding a protein essential for V(D)J recombination and DNA double-strand break (DSB) repair through nonhomologous end joining (NHEJ). Patients present with immunodeficiency and developmental and growth delay.