Disease or Syndrome
alopecia totalis
Definitions related to alopecia totalis:
  • Hair loss that involves the entire scalp.
    Harvard Dictionary of Health Terms
    Harvard Medical Publishing, 2011
  • Loss of all scalp hair.
    Human Phenotype Ontology (HPO)
    The Human Phenotype Ontology Project, 2025
  • Alopecia totalis (AT) is a condition characterized by the complete loss of hair on the scalp. It is an advanced form of alopecia areata a condition that causes round patches of hair loss. Although the exact cause of AT is unknown, it is thought to be an autoimmune condition in which the immune system mistakenly attacks the hair...
    NIH Genetic and Rare Diseases
    National Center for Advancing Translational Sciences
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