It will only be overturned if at least half the ball is hitting the stumps, or about a 6-7 cm margin.

Often this is done by a wide local excision (WLE) with 1 to 2 cm margins.

The Intergroup Melanoma Surgical Trial Task 2b compared 2 cm margins versus 4 cm margins for patients with 1-mm thick melanomas to 4-mm thick melanomas.

A study conducted in the United Kingdom randomly assigned patients with melanomas more than 2 mm thick to excision with either 1 cm margins or 3 cm margins.

This suggests that 1 cm margins may not be adequate for patients with melanomas that are more than 2 mm thick.

Wide local excision of the primary tumor with 1 cm to 3 cm margins, depending on tumor thickness and location.

Treatment is usually surgical, with a wide excision of the lesion; typically a 1 cm margin all around is required.

A resected specimen should ideally contain a 1 cm margin of normal liver.

Smooth the lining out flat again, then turn in the sides of the lining and pin it to the curtains, leaving a 2.5cm (1in) margin of curtain fabric showing at each side.

Pin sides of lining to sides of valance, leaving a 2.5cm (1in) margin of valance fabric showing.