Can A Bulging Stomach With A Malodorous Pus-filled Mass Be Cancer?

my mother had a fall in march 2011, since then she started having problem,incontinence,not eating properly,not sleeping well,and white blood cells more than red blood cells that blood transfusion has to be done in the hospital,doctor said she had myoma,suspected been there for 15 years, have also minor liver cyst(2008- doctor said she had shingle) shingle cause her to not eating the right food because of fear that shingle cause more pain when trigger by wrong food, thats why she was malnourishred, when she was hospitalized had lot of medication to treat potassium low level, urine antibacterial medications, has iron supplement to Keep the blood,had immucell to support immune system, after a week in the hospital my mom came home but continued to have problems such as gastric problem, swelling feet, stomach pain because there is a mass inside so big the size of a fist, oosing pus and smelly, the skin hole the size of a looney. where is this mass came from? THERE IS MYOMA IN THE UTERUS AND OUTSIDE THE UTERUS IS ALSO A FORM OF GROWTH, BUT THIS MASS IS DIFFERENT AND CAUSE PUS TO COME OUT OF THE SKIN TUMMY, my question is the bulging in the tummy develop a pus and ruptured that made a bigger hole the size of a looney, smelly, is it cancer or what is the cause?