Dermatology Flashcards
Skin cancer
1- Melanoma
2-Non Melanoma»_space;> BCC and SCC
Skin Lesion Examination
ABCDE Approach
A- Asymmetry
B- Border Irregularity
C- Color variation
D- Diameter > 6mm
E- Evolution ( Increase in size)
Sunburn
Exposure to UVB light.
Energy is absorbed by DNA, resulting in damage in the form of pyrimidine dimers.
Molluscum contagiosum
A diagnosis of molluscum contagiosum is obvious when a child presents with pearly white hemispherical lesions particularly if they are umbilicated over limbs, trunk or face in various stages of evolution
Dermatitis Herpetiformins
-Intensely pruritic vesicles.
- It is usually not responsive to topical steroids but would response well to dapsone.
- Associated with gluten sensitivity and Coeliac disease.
Anthrax
Anthrax is caused by the Gram positive, aerobic, non-motile Bacillus anthracis.
It produces serious disease in the herbivore host and carnivores acquire the disease from either consuming the spores from the dead animal or by contact.
In humans, cutaneous disease is most common and a painless, black, indurated eschar frequently forms. Mortality from cutaneous disease is 20% if untreated whereas inhalational anthrax may have a mortality of 90% if untreated.
Inhalational anthrax is associated with a poor yield from sputum culture with the greatest yield from blood culture
Keratocanthoma
Keratoacanthomas are rapidly growing, benign skin lesions that often appear as red papules and then develop into a crater filled with keratinous material. They typically reach their maximum size within weeks to months and then spontaneously regress
Lower Lip
The most common malignancy in the lower lip is a squamous cell carcinoma
Leishmaniasis
- Cutaneous leishmaniasis
caused by Leishmania tropica or Leishmania mexicana. - Mucocutaneous leishmaniasis
caused by Leishmania braziliensis. - Visceral leishmaniasis (kala-azar)
mostly caused by Leishmania donovani
