I was having curettage to remove some largish Keratosis from my scalp. The Dermotologist said one looked squamous and he'd send it to the lab. It came back as Bowens Disease which I'd never heard of and can't find mentioned on here in skin cancer.
It is more medically known as 'Squamous Cell Carcinoma in situ' and is usually thought of as a pre-cancer although some say it is cancer. Mine looked like a keratosis but developed a red patch which crusted over. Bowens is restricted into the upper area of skin and hasn't gone into the lower areas and so isn't usually dangerous, but it can change. It can be treated with cream or PDT but my dermo said the best cure is surgery and so I had a skin graft about an inch diameter right on the top of my head. The surgeons biopsy said its all gone but my skin is severely sun damaged.
I'd be interested in hearing if anyone has had Bowens removed by PDT, Efudix or other and how long it has been clear.