Squamous cell carcinoma in-situ (also known as Bowen’s disease) is a superficial, intra-epidermal form of skin cancer. Approximately 3-5% of lesions progress to form a thicker invasive cancer.
Lesions usually preset as flat salmon-pink coloured plaques with an irregular border. A biopsy will usually confirm the diagnosis.
Treatment options include: cryotherapy (freezing in clinic with liquid nitrogen spray), topical agents including 5-flourouracil, surgery, or for areas with poor healing potential such as the lower legs it may be appropriate to merely keep the lesion under observation.