Trichoscopy

 

Bajenaru Daniela (Tazy-vet), Bucharest, Romania

 

 

History

Jack, metis, 5 months, adopted from a shelter and treated against Parvovirus infection.
Prinary lesions: alopecia areas on the head, no other types of lesions were observed.
Two weeks after parvovirosis episode, dermatological problem has begun to progress

 

Physical examination

Poor quality of the hair coat, the hair was thinner and dry
Symetrical hair loss on the auricular pavilions.
Progressive, partial, patchy alopecia and stubble
Non-inflammatory lesions
Non-pruritic

 

 

 

Investigations

Wood’s lamp examination
Microscopic examination of the skin scrapings
Hair plucks (trichoscopy)
Fungal culture
Biopsy
Histopathological examination

 

Differential diagnosis

 

Dermatophytosis
Demodicosis
Pattern baldness
Color dilution alopecia and other fololicular dysplasias

Laboratory results

Wood’s lamp examination- Negative
Microscopic examination of the skin scrapings- Negative
Trichoscopy- irregular distribution and clumping of melanin which distorts the hair shaft.
Fungal culture- Negative
Fig 1,2,3,4- Trichoscopy examination: large grains of melanin which distorts the hair shaft.

 

 

 

 

 

 

 

Skin biopsy and histopathology reveal macromelanosomes, melanin clumping and follicular dysplasia.

 

Diagnosis

COLOR DILUTION ALOPECIA

Treatment

There is no effective treatment for this disorder. The disease is progressive and incurable.
avoiding excessive brushing and shampooing
antimicrobial and keratinolytic products only when needed A high-quality DIET and essential fatty acids

Evolution

after 6 months