Dr Christophe Hsu – dermatologist. Geneva, Switzerland What is Darier’s disease (keratosis follicularis) ? Also called Darier-White Disease. Is one of the most common genodermatosis and affects one person out of 30000. It is inherited in an autosomal dominant pattern. What is it caused by ? The mutated gene codes for a calcium channel regulator.…
DetailsWhat is chicken pox ? It is an infectious condition caused by a virus called Varicella Zoster Virus (VZV). It typically affects children. Does it always present ? Once infected, lesions present only after two to three weeks (incubation period). In 30% of cases, there is no obvious manifestation (subclinical). How does it look like…
DetailsWhat is tuberous sclerosis ? TSC is also called Bourneville-Pringle disease, Epiloia. It affects is of 1 individual out of 15000. It is an inherited (genodermatosis) neurocutaneous disorder with systemic and neurological manifestations (phacomatosis). It what way is it inherited ? It is inherited in an autosomal dominant pattern. However this is not absolute as…
DetailsIchthyosis Vulgaris: close-up What is ichthyosis vulgaris ? It is an inherited condition (Autosomal dominant pattern) It affects one in 250 people. What does it look like ? It causes dry scaly plaques. The lesions are usually more prominent on the limbs (arms and legs). The plaques usually start to appear a few months after…
DetailsDr Christophe HSU – dermatologist. Geneva, Switzerland What is dermatofibroma ? It is a benign condition It typically appears in females 9 times more often than in males. It is also known as superficial benign fibrous histiocytoma. What is it caused by ? The exact cause of its development is unknown. There was an inital…
DetailsWhat is obesity ? Obesity is a public health problem in the industrialized world. It is defined by a BMI (Body Mass Index) of more than 30 Kg/m2. In the United States, it is estimated that 30% of individuals are overweight or obese (BMI more than 25) What medical conditions can we find when obesity…
DetailsWhat is obesity ? Obesity is a public health problem in the industrialized world. It is defined by a BMI (Body Mass Index) of more than 30 Kg/m2. In the United States, it is estimated that 30% of individuals are overweight or obese (BMI more than 25) What medical conditions can we find when obesity…
DetailsSubcutaneous Fat necrosis of the newborn What is Subcutaneous Fat necrosis of the newborn ? It is a lobular panniculitis. It is associated with complications during labor (labour) It presents as asymptomatic indurated subcutaneous dark-red nodules which are typically located in bone proeminant areas (upper back, proximal limbs, cheeks…) When does it occur ? It…
DetailsDr Christophe HSU – dermatologist. Geneva, Switzerland What is it ? Pyogenic granuloma is a benign skin condition caused by the rapid proliferation of blood vessels. Lobular Capillary Hemangioma is the correct name. How does it look like ? Clinically, pyogenic granuloma presents as a fast-growing nodule (s) which is easily broken. Its color (colour)…
DetailsMelasma (chloasma, pregnancy mask) is notoriously difficult to treat and relapses are the norm in those responding to treatment Sunprotection must be against visible light and not only UV light. We cannot stress the importance of using sunprotection by: adopting sun avoiding behaviour avoid going in the sun between 10 am and 4pm (11am and…
Details