Posts Tagged ‘etiology’

Etiology (For Professionals)

Saturday, October 6th, 2012

Etiology (For Professionals) The origin and cause of SK is to the best of our knowledge unknown and what follows below is a list of proposed hypotheses. Origin of SK Hair follicle epithelium Whatever, the triggers and mechanisms of pathogenesis of seborrheic keratosis, they seem to develop from the follicular epithelium.This hypothesis come from the […]

Hori’s Nevus (Bilateral Acquired Nevus of Ota)

Sunday, June 10th, 2012

Introduction It is a skin disorder which concerns mainly Asians Clinically, Hori’s Nevus can coexist with melasma (chloasma, pregnancy mask) and or solar lentigos. It can be difficult to distinguish them*. *But it is important to distinguish them as Hori’s nevus responds well to the Nd-YAG 1064nm laser. However, solar lentigos (lentigenes) respond well to […]

Melasma (Chloasma) (Pregnancy Mask) Diagnostic elements, epidemiology and importance of sunprotection

Monday, February 20th, 2012

Skin color is determined by: The type of melanin The amount of melanin in melanocytes The distribution pattern in surrounding keratinocytes   The term melasma comes from Greek melas: black Etiology: The exact cause is unknown but some factors play a role Ultraviolet light (UV) genetic factors thyroid disturbances cosmetics hormonal factors (in females) Epidemiology […]

Hansen’s Disease (Leprosy): Etiology: Mycobacterium leprae and its transmission (For Professionals)

Thursday, June 10th, 2010

Mycobacterium leprae is the cause of leprosy – the organism being first discovered by Armauer Hansen in 1873. The infected human being is considered to be the only source of infection. Although 4% of the nine-banded armadillo in the USA have naturally acquired leprosy-like disease, only a handful of the spread from the armadillo to […]

Tokelau (Tinea Imbricata): Causes (Etiology)

Friday, April 2nd, 2010

Causes The condition is caused by a strictly anthropophilic dermatophyte called tinea concentricum. Transmission is incompletely understood. Close contact is important but not enough and genetic (mode of inheritance mainly autosomal recessive (“pure race”) with a few autosomal dominant cases), environmental (poor hygiene, iron deficiency, malnutrition) and immunological factors play an important role. Bibiography


Sunday, November 29th, 2009

Dr Christophe Hsu – dermatologist. Geneva, Switzerland What is vitiligo ? Vitiligo is a skin disorder which presents as white spots and patches on the skin. This is due to a progressive loss of the pigment, melanin, which gives us our skin colour. The loss of pigment occurs when pigment cells (melanocytes) are destroyed and […]

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