Please login or create an account. If you do not have access to this content, you will be shown a 30 second preview and licensing options.
- Presentation
Update in Evaluation of Hair Loss Using Trichoscopy
Description
The presentation focuses on the utilization of trichoscopy in diagnosing various forms of hair loss. Developed nearly 20 years ago, trichoscopy employs dermoscopes to magnify hair shafts and assess their characteristics. Key differences in hair shaft thickness help differentiate conditions such as telogen effluvium, characterized by synchronized thinning, from androgenetic alopecia, where thinning is not synchronized. Diagnostic examples include an 18-year-old female patient diagnosed with androgenetic alopecia based on trichoscopic imagery. The presentation also outlines the importance of visual markers like exclamation mark hairs in diagnosing alopecia areata and highlights the confusion with similar conditions such as syphilitic alopecia and tinea capitis, noted for specific hair presentations like coma and corkscrew hairs. Distinct traits of conditions like aplasia cutis congenita and scalp metastasis are discussed, with trichoscopic features aiding in identification. It concludes with the nuances of diagnostic challenges in pseudo lichen planopilaris requiring biopsies when trichoscopic signs are ambiguous. Overall, the session emphasizes the critical role of trichoscopy in enhancing the accuracy of hair loss diagnoses.
View moreConclusions
- Trichoscopy is essential for the differential diagnosis of hair loss diseases.
- Hair shaft thickness heterogeneity is a hallmark of androgenetic alopecia.
- Synchronized hair thinning indicates telogen effluvium, while unsynchronized thinning suggests androgenetic alopecia.
- Alopecia areata can be identified through trichoscopic features like exclamation mark hairs and black dots.
- Tinea capitis is characterized by features like comma and corkscrew hairs visible through trichoscopy.
- Syphilitic alopecia shares similar trichoscopic features with alopecia areata, making accurate diagnosis challenging.
- Aplasia cutis congenita can be recognized by radially arranged hair bulbs in the hairless patches.
- Scalp metastases show specific features such as polymorphous blood vessels and dots upon trichoscopic examination.
- Pseudo pelade presents diagnostic difficulties due to its exclusion nature and subtle trichoscopic findings.
- Kasama Tejapira et al. 2023
- Li Zhang et al. 2022
- Louis-Anne-Jean Brocq