Relevance of trichoscopy in the differential diagnosis of alopecia: A cross‑sectional study from North India.
Indian J Dermatol Venereol Leprol
;
2016 Nov-Dec; 82(6): 651-658
Article
in English
| IMSEAR
| ID: sea-178501
ABSTRACT
Background:
Trichoscopy is an office tool used in the diagnosis of alopecia but its utility has not been assessed.Objectives:
To compare the trichoscopic characteristics of different types of alopecia, identify features of diagnostic value, and to determine the utility of trichoscopy in the diagnosis of alopecia.Methods:
A descriptive cross‑sectional study was performed in patients with alopecia. After clinical assessment and relevant investigations, trichoscopy was performed using a non‑polarized trichoscope (×10). The utility of trichoscopy in difficult cases of alopecia was assessed statistically.Results:
One hundred and twenty patients of alopecia (90 non-cicatricial, 30 cicatricial) were recruited. The diagnosis was made on the basis of a detailed history and clinical examination, and confirmed by biopsy and relevant investigations in difficult cases. Yellow dots (63.3%) were the most common trichoscopic feature followed by thin hair (40.8%). Among the 21 difficult cases of alopecia, trichoscopy was diagnostic in 19 (90.5%). Statistically significant features on intergroup comparison included black dots (Fischer’s exact test, P < 0.001), cadaverized hair (P = 0.024), exclamation mark hair (P < 0.001) in alopecia areata; diameter diversity more than 20% (P < 0.001) and thin hair (P < 0.001) in androgenetic alopecia; broken hair of different lengths (P < 0.001), frayed hair (P < 0.001), split ends (P < 0.001) in trichotillomania; comma hair (P < 0.001) in tinea capitis and arborizing blood vessels in discoid lupus erythematosus (P = 0.012).Limitations:
The small number of patients in some types of alopecia was a limiting factor.Conclusions:
Trichoscopy is useful in the differential diagnosis of alopecia. Among the various trichoscopic findings, those of diagnostic value were identified.
Full text:
Available
Index:
IMSEAR (South-East Asia)
Type of study:
Diagnostic study
/
Observational study
/
Prevalence study
/
Prognostic study
Language:
English
Journal:
Indian J Dermatol Venereol Leprol
Year:
2016
Type:
Article
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