What kind of surgery would be done on a hand with multiple squamous cell carcinoma one noted as 'invasive'?

Wide excision: The goal of skin cancer surgery is to prevent local recurrence (at the same site). 2 ways to assure this: wide excision to get cancer + healthy surrounding tissue or mohs procedure where pathology specimens are checked during the procedure in order to determine 'they got it all'.

Surgical removal: Surgical removal is usually recommended, but in cases where there are many tumors within a small space, the non-invasive ones can sometimes be treated with nonsurgical methods. These include "freezing" them, or treating them with chemotherapy lotions. See your surgical oncologist or dermatologist for your options.

Mohs surgery: The gold standard for treatment of skin cancers is mohs surgery. It has the highest cure rate. It is important that you verify that your mohs surgeon is recognized as a fellowship-trained surgeon. Only members of the american college of mohs surgery (acms) are fellowship trained to perform mohs surgery and are listed on their website directory. The link to the acms is: http://www.Mohscollege.Org/.