How would you manage this new lesion on the palm?

In this week's case discussion, submitted by Dr David Stewart, we look at a 45-year-old patient with no history of skin cancer who presents for a routine skin check. This new, small, pigmented lesion is noted on the palm of the right hand.  

Dr Stewart opts to observe the lesion, and the patient returns for a follow-up check six months later. What do you think of it, and what would you do next?

1: Initial presentation and 2: Six months later

Update

The lesion was removed with a punch biopsy. Here is the pathology result:

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