500 likes | 681 Views
Common MMalignant Skin Tumours, M elanoma, Biopsy M ethods, Surgical. Therapy. Claire Temple MD MSc FRCSC Associate Professor, UW O Division of Plastic Surgery Hand and Upper Limb Centre. Skin Examination. Physical Examination. Overall skin type. Lesion description.
E N D
Common MMalignant Skin Tumours, M elanoma, Biopsy M ethods, Surgical Therapy Claire Temple MD MSc FRCSC Associate Professor, UW O Division of Plastic Surgery Hand and Upper Limb Centre
Physical Examination Overall skin type Lesion description
Fitzpatrick classification I W hite II W hite III W hite Always burns, never tans Always burns, little tan Slight burn, slow tan IV Pale brown V Brown Slight burn, fast tan Rarely burns, dark tan Never burns, dark tan VI Dark brown/black
Lesion description Size in mm - two dimensions Color Surface characteristics – scale(excess keratin) crust(dried serum) excoriated/erosion/ulcer
Lesion description NOUN Macule/patch flat lesion<>1cm Papule/plaque raised lesion <>1cm Nodule/tumour deep dermal lump <>1cm Vesicle/bulla elevated fluid filled lesion <>1cm
If pigmented lesion, also describe: A asymmetry B borders C color D diameter E elevation
Biopsy Techniques Incisional Shave Punch Incisional ellipse Excisional
Etiology - MM ultifactorial UVR (Sun, tanning beds) Ionizing radiation Age >40 Fitzpatrick I, II phenotype Immunosuppression Old, unstable scars Genetic conditions Insecticides, hydrocarbons, arsenic
Basal Cell Carcinoma Malignant tumour arising from basal cell layer of epidermis 90% of all skin cancers 40% of North Americans will develop a BCC 85% facial, 30% nose
Basal Cell Carcinoma Nodular Form Telangiectatic papule translucent pearly rolled border Slow growing Rarely metastasizes
Variants Nodular - 60% Superficial Pigmented Morpheaform or sclerosing
Treatment Prevention Electrodessication/Curettage Surgical Excision with 4 mm margins Mohs
SCC Malignant lesion arising in epidermis Age >40 15% lifetime risk in Caucasians Risk of metastases 0.5-6% Thickened, ulcerated, erythematous lesion Examine nodal basins
SCC Main treatment is surgical 6mm or wider margin Radiation May recur along nerves May metastasize