Spondylometaphyseal Dysplasia, Sedaghatian Type

Spondylometaphyseal dysplasia (SEMD), Sedaghatian type is a neonatal lethal form of spondylometaphyseal dysplasia characterized by severe metaphyseal chondrodysplasia, mild rhizomelic shortness of the upper limbs, and mild platyspondyly.

Epidemiology

Nine cases have been reported so far in patients of Iranian, Yemeni and Caucasian origin.

Clinical description

A lacy appearance of the iliac crests, long fibulae, abnormal tarsal bones, cardiac arrhythmia, and intracranial anomalies have been described. Intrauterine growth is normal. The majority of patients die in the first days of life with symptoms of cardiorespiratory insufficiency. Subacute myocarditis, cortical necrosis of kidneys, adrenal and pulmonary hemorrhage, absence of the corpus callosum and marked frontotemporal pachygyria have been found at autopsy.

Etiology

Etiology remains unknown.

Genetic counseling

Autosomal recessive inheritance has been suggested.