Benign Skin Tumours Flashcards
What is a dermatofibroma (histiocytoma)?
Benign overgrowth of fibrous tissue in the dermis
What is a melanocytic naevi (mole)?
Benign proliferations of melanocytes
Different types of melanocytic naevi (mole)
Junctional
Compound
Intradermal
What is molluscum contagiosum?
Benign tumour caused by molluscum contagiosum virus (can be sexually transmitted)
Presentation of molluscum contagiosum
Fleshy, firm, umbilicated, pearlescent nodules
Children
Treatment of molluscum contagiosum
Self-limiting but may take months/years to disappear
Local application of liquid nitrogen can be offered
What is seborrhoeic keratosis?
Benign proliferations of epidermal keratinocytes
Presentation of seborrhoeic keratosis
Stuck-on appearance
Greasy hyperkeratotic surface
Treatment of seborrhoeic keratosis
Liquid nitrogen
What are warts/verrucas?
Benign tumour caused by HPV virus infecting keratinocytes
HPV types causing warts/verrucas
HPV types 1-4
What are actinic lentiginies?
Age or liver spots
Related to UV exposure
What are freckles (Ephilides)?
Patchy increase in melanin pigmentation
Occurs after UV exposure
