Phototherapy is widely used in dermatology for the treatment of various skin conditions such as psoriasis, eczema, vitiligo, scleroderma and the list goes on and on. Different light spectrums, such as ultraviolet A (UVA), UVB, narrow band UVB…are used. Although poorly understood, suggested mechanisms are: Immune suppression (especially for UV): through immunoregulation by Langerhans cells,…
Although tattoos are fairly easy to do they can be a challenge to remove. Why are lasers used for tattoo removal ? In the past tattoo removal involves tissue-destructive techniques including excision/grafting, dermabrasion, cryosurgery and electrosurgery. Although effective at removing the tissue pigments, these techniques often cause scaring, textural changes, keloids and permanent dyschromia. Lasers…
Albinism is a rare genetic condition affecting around 1 out of 17000 individuals (can vary geographically). Albinism is characterized by severe and handicapping deficits in the visual system in association with a most variable hypopigmentation phenotype: visual defects include: foveal hypoplasia, reduced pigmentation of retinal pigment epithelium cells, misrouting of the optic nerves at the…
Melasma (Chloasma, Pregnancy Mask) is a common pigmentary condition and although it occurs more often in females and that hormonal factors may play a role, it is still incompletely understood. Clinically: In the lesions, telangiectasia (dilated broken blood vessels), tend to be present and melasma lesions have more vascularization when compared with the perilesional skin.…
In this presentation, the presenter takes us to the origins of humanity end explores the great human migrations in the last 2000 years – the genetic variations responsible for the evolution of skin colour are presented to us. The beginning is in Africa; Darwin quotes that “the giant ape is the cousin of mankind”. The…
Leprosy (Hansen’s disease) is an often ignored skin disease and this infectious disease can sometimes affect the nervous system. Non-specific nail changes can be found in Leprosy. The authors sought to study nail changes in leprosy: In this study cases of Hansen’s were collected from August 2011 to April 2012 (exclusion congenital nail deformities, fungal…
number of new cases in 2008: 17,441 number of new cases in 2012: 18,994 High number of new cases (CDR (case detection rate) more than 10 out of 10000 cases) in these Indonesian regions: Papua W Papua Maluku Sulawesi Java (as the population is a lot higher) Aceh (Sumatra) Subclinical leprosy is more…
PDT (Photodynamic therapy) acts through the elimination of the bacteria Propinibacterium Acnes Short contact with the photosensitizing substance is enough (less than 90 minutes vs around 4 hours for conventionnal indications) More effective for papulopustular lesions (vs comedonal) phototypes II and III carry a lower risk of (postinflammatory hyperpigmentation) PIH following treatment. The authors…
Leprosy is an infectious disease which affects the skin and the nerves. It is coming back mainly through imported cases…despite having being forgotten for a long time. It is prevalent in India and these common manifestations is why dermatology is taught together with leprosy (as it is with syphilis in many countries). In other words,…
Leprosy is a poorly understood infectious disease which leads to important discrimination. Although cases still occur Vietnam was met the WHO criteria for disease elimination in 2000. Out of the 87 million people living in Vietnam, there were 1336 cases reported in 2001; in 2012 this number fell to 296 cases. Leprosy in Vietnam –…
