COMMUNICATIONS TO THE EDITOR 243 O’Donohue the pleural manifestation occurred by accident, not associated with the common etiologic relationship of the yellow nail syndrome, namely, the primarily defective lymphatic circulation. The history data on their patient as having profound mental retardation and being under continuous use of anticonvulsants and sedatives, suggests a propensity toward th...

The Witkop syndrome is a rare autosomal dominant disorder characterized by the absence of several teeth and abnormalities of the nails. This is the first report of a rare genetic tooth and nail syndrome diagnosed in a 2.5-year-old boy with early exfoliation of the primary canine, absence of the primary incisors, and nail dysplasia. A homozygous mutation was identified in 3’-UTR of MSX1 gene in ...

Onychogryphosis is an acquired nail plate change. It often affects the toenail and is characterized by an opaque, yellow-brownish nail plate that is distorted, grossly thickened, elongated, and partly curved resembling a ram's horn. Tuberous sclerosis complex is a multisystem disorder associated with high rates of mental retardation, autism, cognitive impairment, behavioral problems, or seizure...