What Does A Mass In The Upper Right Side Of The Abdominal Walls Indicate?

Question: I have a solid mass in the upper right quadrant of my abdomen. what could it possibly be? I looked and the location is about where the preyer's patches is.

Thank your for your quick response. since I have written you the first question I did some searching on the internet and did a bit more self examination. to my dismay I found some more things that concern me. I have a bit of swelling in locations of lymph nodes. It is not hard at all it is really just inflamed a bit (not red or hot). the ones I have noticed are under arm pit and in my left knee and sort of a puffiness in the lower abdominal area. (like where my ovaries are located). One breast is a bit larger then the other but it has always been that way for the last 5 years they have just gotten larger. both have increased in size but my left one is still larger than the right one. I had a clean mammogram 2 years ago. I do have a itchy rash between my breasts and i have had that numerous times before but went to a dermatologist and it was cleared up with an antibiotic and a cream. I had my appendix and spleen removed years ago. I am in the middle of menopause and I have hot flashes and I have always had chills. Everything I read about cancer on the internet is that my symptoms are common but I have no weight loss, fatigue, dark urine, and the lymph nodes are not hard. I am hoping for the best and I will see a physician. I just was wondering if this could be anything else other than cancer so I could put my head at ease a bit until I get into a physician?