El Gawhary, Van Mechelen, and Urbach Reply:

Vydrov and Van Voorhis reply

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Urbach-Weithe disease.

A 10-year-old girl born of consanguineous marriage presented with hoarseness of voice and difficulty in protruding tongue since last five years. No other family member was affected. Cardiovascular, ophthalmological and neurological examination was normal. Hematological profile was normal, including X-ray skull. Cutaneous examination showed classical multiple beaded papules along the eyelid marg...

Urbach-Wiethe syndrome.

To cite: Parida JR, Misra DP, Agarwal V. BMJ Case Rep Published online: [please include Day Month Year] doi:10.1136/bcr-2015212443 DESCRIPTION A 14-year-old girl was referred for skin tightening in the fingers. She did not have Raynaud’s phenomenon, gastroesophageal reflux disease or other systemic symptoms. She had had a hoarse voice since birth and was developmentally normal. She was born of ...

Reply to van Hoorn: Converging lines of evidence.

Anomalous Urbach tail in GaAs.

The Urbach tail in crystalline GaAs and Si due to thermal vibration is evaluated in the temperature range 0—810 K. Recent experiments suggest that there is no thermally induced Urbach tail in undoped GaAs. This is most unexpected since thermally induced tails at the absorption edge having the Urbach form and widths Eo(T) linear in T are observed in a wide range of crystalline and amorphous semi...