Skin lesion.

Skin layers:

a) epidermis: stratum corneum (keratin), granular cell layer, princkle cell layer, basal cell layer and melanocyte.

b) dermis

c) subcutanous

D) vascular

(MR. imran ques: function of skin )

Protocol from Prof Lee: 4S, CET, PMS.

1. Epidermis: 

Benign

• skin tag (papilloma)
• warts
• seborrhoeic keratoses
• Keraton acanthoma 

premalig

• solar keratoses
• bowens disease
• erythoplasia of Querat

malignant

• SCC
• BCC

Melanotic lesion

• benign pigmented naevi
• malignant melanoma

2. Dermis

• pyogenic granuloma
• histocytoma
• keloid
• secondary ca
• Kaporsi sarcoma

3. Lesion from skin appendages

• sebacous cysts (at hairy area, 50% punctum, origin: outer sheath of hair follicle, content epthelial emennts )
• dermoid (hard, origin : epithelial remnant, midline)
• pilonidal sinus

infection: Faruncle, carcucle (s.c) tx: I n D, abx

4. Subcutaneous and deeper

• lipoma/liposarcoma (slip sign  positive, lobulated, compressible, move all direction, )
• neurofibroma and sarcoma
• neurofibromatosis
• schwannoma
• deeper lesion : ganglion ( near join and tendon, if superficial to tendon move at right angle, if deep will not move)
  

5. Vascular origin

• campbell de Morgan spot
• spider neavi
• angiomas
• glomus tumour of digit.

6. Muscle

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