RESUMO
Keratosis follicularis spinulosa decalvans is a rare disease, with genetic transmission either X-linked or sporadic, characterized by follicular hyperkeratosis and cicatricial alopecia. The disease usually begins in early childhood exacerbating throughout adolescence. The therapies are somewhat effective, with frustrating treatment when there are changes which are predominantly cicatricial. It is reported a case of child with intense cicatricial alopecia, with precocious changes (already present at birth) that rapidly evolved to diffuse cicatricial alopecia on the scalp, which has limited the treatment, with disappointing results.
Assuntos
Alopecia/etiologia , Doença de Darier/complicações , Alopecia/patologia , Pré-Escolar , Doença de Darier/diagnóstico , Doença de Darier/patologia , Feminino , HumanosRESUMO
A queratose folicular espinulosa decalvante é afecção rara, de transmissão genética ligada ao X ou esporádica, caracterizada por hiperqueratose folicular e alopecia cicatricial. Inicia-se, geralmente, na primeira infância, exacerbando-se na adolescência. As terapias são pouco efetivas, com tratamento frustrante, quando já há alterações predominantemente cicatriciais. Relata-se caso de criança com quadro de alopecia cicatricial intensa, com alterações precoces (já ao nascimento) e rápida evolução para alopecia difusa cicatricial do couro cabeludo, o que tornou o tratamento limitado e desapontador.
Keratosis follicularis spinulosa decalvans is a rare disease, with genetic transmission either X-linked or sporadic, characterized by follicular hyperkeratosis and cicatricial alopecia. The disease usually begins in early childhood exacerbating throughout adolescence. The therapies are somewhat effective, with frustrating treatment when there are changes which are predominantly cicatricial. It is reported a case of child with intense cicatricial alopecia, with precocious changes (already present at birth) that rapidly evolved to diffuse cicatricial alopecia on the scalp, which has limited the treatment, with disappointing results.
Assuntos
Pré-Escolar , Feminino , Humanos , Alopecia/etiologia , Doença de Darier/complicações , Alopecia/patologia , Doença de Darier/diagnóstico , Doença de Darier/patologiaRESUMO
The responses of animal experimental models related to the infectivity, virulence and pathogenicity of Paracoccidioides brasiliensis is constantly used to develop new perspectives of investigation. The rodent Calomys callosus, Rengger 1830 (Rodentia: Cricetidae) is an indigenous inhabitant of the savannah environment found in the central regions of Brazil. The aim of the present work was to evaluate the histopathological and serological features of C. callosus after inoculation with the Pb18 strain of P. brasiliensis. Furthermore, A/Sn and B10.A mice strains were also tested to compare the results obtained in C. callosus to these well-established experimental models of resistance and susceptibility respectively. In every instance, survival analysis was performed, and histopathological study of the lungs, liver and spleen was employed to investigate tissue involvement, degree of inflammation and fungal presence. Levels of antibodies to P. brasiliensis were measured by using an enzyme-linked immunosorbent assay after 4 weeks and at the advanced stage of infection. The mortality rate was proportional to inoculation dose in all groups, but overall it was much superior in C. callosus than in the B10.A-susceptible mice. Macroscopical and microscopical pathological alterations were also more extensive and remarkable for C. callosus, once again proportional to inoculation dose, but more noticeable differences among the studied groups were found with 0.6x10(5) inoculum. In addition, the serological profile of C. callosus was similar to that found for B10.A-susceptible mice. Infection of C. callosus with 0.6x10(8) Pb18 inoculum resulted in more serious illness, and it decreased in severity in proportion to the inoculum dose. This difference was more pronounced in C. callosus, and the clinical, serological and pathological findings in this animal were more intense and precocious compared with the B10.A-susceptible mice. The present results suggest that C. callosus is a potentially alternative experimental animal model for paracoccidioidomycosis infection.