Or you could just learn what 'mastectomy' meansErr well I think it is in some cases especially if you are in med med.
Eg if you know that the root for breasts were mam and sectomy or resection means to remove. Then you could say that mastectomies are basically breast removal/reduction.
Trust me, you'll have plenty of stuff to be studying in HSFY (and I'd imagine med as well), so Latin/Greek (at a level on that website) falls under the 'extras for the extremely interested' category. I say this for the benefit of future HSFY's, who have a tendency to see something suggested on here and go 'zomg, I must learn ALL TEH STUFF'.