Skin Conditions

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 […]

Skin Conditions – Table of Contents

Monday, March 5th, 2012

Acne vulgaris (pimples) (common acne) Actinic keratosis Contact allergy (Allergic contact dermatitis) Alopecia Areata Eczema and Atopic dermatitis Basal Cell Carcinoma (BCC) Photos Skin Signs of Internal Cancers Skin cancers Chicken Pox Skin Disorders in Young Children Chloasma (Melasma, Pregnancy Mask) Skin disorders induced by cosmetic products Darier’s Disease (Keratosis Follicularis) Dermatofibroma Diaper Candidiasis Skin […]

Lichen Planus

Wednesday, December 15th, 2010

Lichen Planus What is lichen planus ? It is an inflammatory condition of the skin. What is the chance of having it ? At any time, the frequency is evaluated at 0.5% of the population The development of lesions is triggered by stress. What does it look like ? It is characterized by violet bumps […]

Hidradenitis Suppurativa (Verneuil’s Disease)

Tuesday, November 30th, 2010

Dr Christophe Hsu – dermatologist. Geneva, Switzerland How frequent is it ? It affects 1% of the population with a peak of 3-4 % in the 11 to 30 years old age group. Females are affected 3 times more than males. (controversial as some studies report no difference) How does it present ? It presents […]

Hansen’s disease (Leprosy)

Friday, August 6th, 2010

Dr Christophe Hsu – dermatologist. Geneva, Switzerland What is Hansen’s disease? It is an infection caused by a bacteria called Mycobacterium Leprae. How is it transmitted? This is still incompletely understood but it would be airborne. It is not transmitted during birth and even prolonged contact does not guarantee transmission. How is it diagnosed? Examination […]


Saturday, July 10th, 2010

Dr Christophe Hsu – dermatologist. Geneva, Switzerland What is psoriasis ? It is an inflammatory skin condition. An infiltrate of cells involved in inflammation attract other participants to perpetuate the inflammatory process. What are the chances of having it ? The proportion of the population having psoriasis is 2%. This percentage is higher regionally, particularly […]

Lyme Disease (Borreliosis)

Monday, June 7th, 2010

Lyme disease, what is it? Lyme disease (also called Borreliosis) is a systemic disease with skin manifestations. It is caused by bacteria of the Borrelia family which is transmitted via a tick bite (tick of the Ixodes family). The name Lyme disease refers to “Old Lyme”, a town in Connecticut in the United States where […]

Pityriasis Rosea

Thursday, June 3rd, 2010

Pityriasis Rosea Dr Christophe HSU – dermatologist. Geneva, Switzerland What is pityriasis rosea? Pityriasis rosea is a kind of “skin flu”. It might also be caused by a virus. It is more common in young adults. It tends to have seasonal peaks. What does it look like? It is characterized clinically: initially, it presents as […]

Lupus Erythematosus

Wednesday, June 2nd, 2010

What are the types of lupus erythematosus ? There are three types: Systemic (or acute) lupus erythematosus: important involvement of the internal organs with or without skin manifestations. Subacute lupus erythematosus: moderate internal involvement with cutaneous manifestations. Discoid (or chronic) lupus erythematosus: skin involvement only. How does lupus erythematosus appear on the skin? Generally speaking, […]

Psoriasis: Auspitz Sign

Tuesday, May 25th, 2010

By removing the scale on the surface of the lesion, bleeding happens. The pinpoint bleeding comes from the rupturing of small vessels. These small vessels are located in the dermal papillae which are elongated in psoriasis (papillomatosis).

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