Lecture 9 Benign & Premalignant Skin Lesions Flashcards
Name benign lesions
Seborrhoeic Keratoses Viral warts Cysts Dermatofibroma Lipoma Angioma Pyogenic Granuloma
What are the prone of cryotherapy
Cheap
easy to perform
What are the cons of cryotherapy
May scar
Cannot perform pathology
Failurer/recurrence
Sign of Leser-Trelat
- Paraneoplastic phenomenon
- Abrupt onset of widespread seborrhoeic keratosis, particularly in a younger individual
- SKs remain benign but may indicate underlying solid organ malignancy
What is Laser-Trelat an indication of
GI adenocarcinoma
What is the main cause of viral warts
HPV
How is viral warts treated
Immune system will normally clear
Cryotherapy/wart paint- can stimulate immune system
Curettage
Name the different types of cyst
– Epidermoid cyst (often wrongly called sebaceous) – Pilar cyst – Steatocystoma – Dermoid cyst – Hidrocystoma – Ganglion cyst
How are cysts treated
Excision • If inflammed/infected – Antibiotics – Intralesional steroid – Incision & Drainage
What are dermatofibroma
• Benign fibrous nodule, often on limbs
– Proliferation of fibroblasts
What are lipomas
- Benign tumour consisting of fat cells
* Common
Name vascular lesions
Angioma
Pyrogenic granuloma
What is an angioma
– Overgrowth of blood vessels in the skin due to proliferating endothelial cells
• Cherry angiomas
• Spider naevi
• Venous lakes – dilated venules
How is angioma treated
Excision or laser
What is a pyogenic granuloma
– Rapidly enlarging red/raw growth, often at a site of trauma.
– Bleed easily
– Common on head and hands
– Removed by curettage & cautery
Name pre malignant lesions
Bowens disease
• aka Intraepidermal squamous cell carcinoma
What are the risk factors for pre-maligant lesions
UV radiation- DnA damage and immunosuppression
What is the treatment of Pre-malignant lesions
- Cryotherapy
- Curettage
- Photodynamic therapy
- Imiquimod
What is actinic keratosis
- Rough scaly patches on sun damaged skin
* Low risk of transformation to SCC
How is actinic keratosis treated
– Cryotherapy
– Curettage
– Diclofenac Gel
– Imiquimod
Where are lentigo malignant usually found
Facial
In situ
