MedGen

An anomalous trapezoidal appearance of a vertebral body. A trapezoid is a four-sided shape that has two sides that are parallel and two sides that are not parallel. In this case, the two lateral sides of the vertebra are parallel, and the top and the bottom are slanted with respect to each other such that the vertebra is shorter in the front or back than on the other side. [from HPO]

Nivelon-Nivelon-Mabille syndrome (NNMS) is characterized by progressive microcephaly, vermis hypoplasia, and skeletal dysplasia. Variable features include infantile-onset seizures, dwarfism, generalized chondrodysplasia, and micromelia (Abdel-Salam et al., 2019). [from OMIM]