Hair Shafts in Trichoscopy

The 2013 document highlights the utility of trichoscopy in diagnosing hair and scalp diseases by examining hair shaft structure and size. It details the identification of various hair shaft abnormalities, such as exclamation mark hairs, tapered hairs, and trichorrhexis nodosa, and their clinical significance in conditions like alopecia areata, tinea capitis, and trichotillomania. Trichoscopy is also useful for monitoring treatment efficacy and differentiating between hair loss conditions. The document notes that while some abnormalities are condition-specific, others may result from external factors like hair styling. It concludes that trichoscopy is a valuable non-invasive tool for providing diagnostic clues in different types of hair loss.