Gene dosage of the spermidine/spermine N(1)-acetyltransferase ( SSAT) gene with putrescine accumulation in a patient with a Xp21.1p22.12 duplication and keratosis follicularis spinulosa decalvans (KFSD)

Keratosis follicularis spinulosa decalvans (KFSD) or Siemens-1 syndrome is a rare X-linked disease of unknown etiology affecting the skin and the eye. Although most affected families are compatible with X-linked inheritance, KFSD appears to be clinically and genetically heterogeneous. So far, the ge...

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