Conference Notes
Hyperpigmentary Disorders in Caucasians (For Professionals)
Friday, September 28th, 2012The following conditions can be found in the Caucasian population (non-exhaustive list): Freckles (Ephelides): increased amount of melanin with normal number of melanocytes lentigenes (solar lentigo): appear after 50 years old. Histologically: epidermal pigmentation located mainly in the basal layer Caused by an increase number of melanocytes (containing a normal amount of melanin) Solar hyperpigmentation: […]
Cysteamine Cream as a new skin depigmenting product
Friday, September 28th, 2012Presented at the Scientific Meeting: European Academy of Dermatology (EADV), Annual Meeting. Prague (Praha), Czech Republic (Česká republika, Česko), 27 – 30 September 2012 Hsu.C. 1, Pourahmadi M.2, Ahmadi S. 2, Ali Mahdi H. 3 1:Centre Medical du Lignon, Geneva, Switzerland. 2: Jahrom University Medical school, Jahrom, Iran. 3: Global Dermatology Information Portal. Royal Bahrain […]
Differentiating Psoriasis From Seborrheic Dermatitis (Seborrhoeic Dermatitis) (For Professionals)
Thursday, September 27th, 2012This is particularly useful when the diagnosis is not obvious from clinical examination* (nails, extensor surfaces (elbows), folds on the face): Psoriasis lesions appear reddish Seborrheic Dermatitis (Seborrhoeic Dermatitis) lesions appear yellowish *It is typical to have this problem when the lesions are located on the scalp only Use a dermatoscope and look at the […]
Are the newer non-Hydroquinone-based creams effective in treating melasma (chloasma, pregnancy mask) ? (For Profesionnals)
Thursday, September 27th, 2012The new generation (that is non-hydroquinone based) depigmentation creams also work… They are not as a group more effective than hydroquinone-based topicals(HQ)… …However they do have a much lower frequency and severity of side-effects Contributors: Dr Christophe HSU – dermatologist. Geneva, Switzerland Source of Information: 2012 (09) – Sachdev M. 21st Annual Congress of the […]
Are hormones involved in the pathogenesis of melasma (chloasma, pregnancy mask) ? (For Professionals)
Thursday, September 27th, 2012Hormones only provide a partial explanation to the pathogenesis of melasma (chloasma, mask of pregnancy) In a study involving 400 pregnant women: 16% of them had melasma even though it was not related to the stage of pregnancy Also the pigmentation was located more often on the arms which is an atypical distribution for melasma. […]
Are lasers effective in the treatment of melasma (chloasma, pregnancy mask) ? (For Professionals)
Thursday, September 27th, 2012Other articles deal with this issue however we can say here that lasers play a limited role: They are only indicated in the treatment of dermal melasma (chloasma, pregnancy mask). Even in this indication, the response is unpredictable* and the pigmentation tends to recur. Response to treatment has been reported for the following lasers (non-exhaustive […]
Is oral tranexamic acid effective in the treatment of melasma (chloasma, pregnancy mask) ? (For Professionals)
Thursday, September 27th, 2012Tranexamic acid is an antifibrinolytic which inhibits the conversion of plasminogen to plasmin. It has an antiallergic and antiinflammatory action. It might be effective in the treatment of melasma (chloasma, pregnancy mask): However tranexamic acid is in its inital stages and over the long run, the good results in the few reports* might not be […]
Is Hydroquinone (HQ) safe ? (For professionals)
Thursday, September 27th, 2012Hydroquinone is the Gold Standard for treating Melasma (Chloasma, Pregnancy Mask). Numerous concentrations are used but a concentration of 4% in practice begins to be effective (and to have side-effects). Side effects include: erythema burning exogenous ochronosis confetti-like depigmentation In practice it is safe to use at 4% when closely supervised medically. Contributors: Dr Christophe […]
Melasma (Chloasma, Pregnancy Mask): Do not mix it up with other Conditions (For Professionals)
Thursday, September 27th, 2012In practice, when a patient is seen during a consultation, for a pigmentation problem, it is labelled “facial melanosis”. The most frequent cause of facial melanosis is chloasma (melasma, pregnancy mask) When in doubt should we do a biopsy on the face ? Yes, sometimes. Here are some other causes of facial melanosis: Leprosy when […]
Pigment Characteristics in the Caucasian Population (For Professionals)
Thursday, September 27th, 2012Pigments There are two types of pigments (melanin) which determine skin colour in caucasians: Eumelanin: Has a photoprotective action Acts as a physical and chemical filter to light Absorbs free radicals in response to sun exposure Pheomelanin Is found most often in red-haired individuals Has a photoaggressive action Produces free radicals in response to sun […]
