Rare Unusual Coincidence of Leri–Weill Dyschondrosteosis Resulting from a Downstream Enhancer Deletion of SHOX Gene and Neurofibromatosis Type 1

We report an unusual coincidence of two Mendelian disorders in a proband presenting with short stature and café-au-lait spots. Genetic testing yielded both a deletion in the downstream enhancer region of SHOX gene related to Leri–Weill dyschondrosteosis, and Neurofibromin gene truncating mutation resulting in Neurofibromatosis 1 phenotype. Pedigree analysis indicated a crossover in the pseudoautosomal region 1 (PAR1) in one of the family members gametes. To the best of our knowledge, this specific combination has not been previously reported.