This man has been a heavy smoker for many years.   The white thickening is scarring from the smoking and there is early Leukoplakia within this scarred area that requires close followup as it can easily change to become and squamous cell carcinoma.  Clear message - DO NOT SMOKE as it increases the incidence of ALL cancers.

Man in his fifties with this sore on his forehead that has been present for at least 12 months.  This lesion is 2 cm across and will require a flap procedure to close the defect.
Clear message - any skin that doesn't heal within a month needs to be presumed to be a skin cancer unless proved otherwise

Typical serpentine blood vessels indicating that this lesion is likely to be a Basal Cell Carcinoma

76 yr old man with a spot on his scalp.  Central dark pigment clods surrounded by a reticular network and sharply demarcated scalloped edges.  This is a Solar Lentigo commonly called an Ink Spot Nevus

83 yr old man has spent a lot of time outdoors.  This ulcerating lesion has serpentine blood vessels and the white spots represent sclerotic fibrous tissue.   This is likely to be a Basal Cell Carcinoma of the sclerosing subtype

71 yr old man with a Seborrheic Keratosis.  These are of no concern

This teddy bear is on a mans thigh and has been there a long time.  You will notice that the pigment pattern is regular and because the pigment is brown and black it means it is only in the epidermis.  This is a Congenital Nevus and is of no concern

Beware the persistent ulcer on a tongue. If this was present for longer than one month, it requires a punch biopsy because of the possibility of it being a squamous cell carcinoma

This lesion on the upper lip has been present for a few months and was examined with the dermatoscope and looks like it is just scar tissue.  The picture below is of the same lesion without any pressure from the dermatoscope and you can see the blood vessels that allow the diagnosis to be made. 

Lip Basal Cell Carcinoma

This lesion consists of skin coloured clods with central blood vessels with a uniform pattern.  This has the features of a Seborrheic Keratosis. Old terminology describes this as a cobblestone appearance

This spot has a dark black clod centrally with a grey smudge around 9 o'clock.  This is a piece of rusty steel under the skin

This beautiful flower shows central ulceration with surrounding white thickening related to keratinisation and is likely to be a Squamous cell carcinoma.