Trichodystrophies: A Hair-Raising Differential Diagnosis

The document serves as a guide for clinicians to diagnose hair shaft disorders, which can be either hereditary or acquired, affecting individuals of any age. It underscores the necessity of a comprehensive patient history and physical examination, including a pull test, to assess hair fragility or perceived hair loss. The guide recommends a detailed inquiry into the onset, duration, and patterns of hair issues, as well as any treatments used, and stresses the importance of understanding cultural hair care practices that may contribute to trichodystrophies. Diagnostic tools such as trichoscopy, light microscopy, scanning electron microscopy (SEM), and amino acid analysis are discussed for identifying specific hair shaft defects. The document also advises clinicians to consider associated physical exam findings that could indicate genetic syndromes, particularly in children, and suggests additional evaluations for certain syndromes associated with hair shaft disorders. However, the document does not provide specific study numbers or outcomes.