welcome to health care magic
In the query you didn't mention about the mass which was removed..was it a lymph
regarding that groin area,,most common mass that arises is hernia
....usually hernia contains either intestines or bladder or both..it needs surgical correction of underlying abdominal wall rather than removal..
Regarding the sutures and numbness
,,sutured area means that small place of cutaneous nerves are cut..
and you get back to normal with in days..no need to worry about this numbness...
hope you get answer from me..
consult your dr for more suggestions..