Firstly there are many institutes in KHI like aga khan, jmpc, Kiran foundation etc to deal with oncology cases. Secondly I can imagine how weak and old your mother must be, still an oncologist will only proceed with chemo or radiation if the patient meets certain health criteria and if the benefits outweigh the risk of treatment. Thirdly cannabis is used to help manage pain related to cancer but more information can only be gained by someone currently working with it. I would advise you to take a second opinion with an oncologist if need be.
For further consultation, you can choose from our list of best Oncologists in Karachi and seek in-person advice.