This lesion on the back of a lady looks clinically like a Seborrheic Keratosis and the dermoscopy picture also suggests that when looking at the lower edges.  A closer look reveals some lines of pigment dots and also dot blood vessels making this likely to be a Pigmented Intraepidermal Carcinoma which is what the report has confirmed. Below is the closer view of the pigment.

Same lesion as above  - Pigment lines present in the centre of the picture

The pigment in this lesion is arranged in a random pattern of small dark brown clods and this is more likely to be seen in a Pigmented Basal Cell Carcinoma. Once again, that is the diagnosis 

You will note that it is symmetrical compared to skin cancers which generally are erratic in structure.  There is central crusting with surrounding erythema from the increased vascular activity.  This man had numerous lesions like this that indicates a systemic cause.  In his case the Dermatitis had been induced by work stress.

This lesion is on the face of a man who had surgery performed by his GP  only some weeks ago.  It has returned and is growing very rapidly.  He was referred to the hospital and would have had to wait at least two months to have it removed.  
Anyone who is having treatment for Leukemia like this man is, should have very regular skin checks and lesions such as these need to be removed urgently.  There is a very high risk that  growths of this nature will spread to lymph nodes and eventually causing the patients demise.  Two months wait for surgery is two months too long.

Lip BCC  on a sailor 
Histology Macronodular Basal Cell Carcinoma 

This lesion is in the central back of a lady. It has a shiny surface over a cystic lesion.  Both the serpentive blood vessels and the pattern of the pigmentation suggests that it is a Basal Cell Carcinoma BCC