Thanatophoric Dwarfism

SummaryA case of Thanatophoric Dwarfism is described in which the foramen magnum was found to be grossly reduced in size. The distance between the petrous temporal bones was also reduced in size but were anatomically normal.It is thought that the size of the foramen magnum may be associated with areflexia and hypotonia and the lethal nature of the disease.Radiography forms the basis of accurate diagnosis. From this, reporting, precise classification and incidence follow.