Thanks for the query to H.C.M. Forum.
If I were your treating doctor for this lump and weight loss
, I would come up with these possibilities , these includes.
1 Ovarian cyst
right side , diagnosis can be confirmed by ultrasound
of lower right side abdomen.
2 Appendicular lump as your history is evident about this , diagnosis can be confirmed by ultrasound as well clinical history & physical examination.
3 Since your had lost 20 kg within 2 & 1/2 months and there is a lump so may be cancer of large intestine . Diagnosis can be confirmed by M R I and ultrasound of part involved.
In my opinion weight loss and tumor
are indication of carcinoma so first of all consult a surgeon and get his opinion as physical as well clinical examination is important in this case.
Good luck. Dr. HET