Hi,Dear thanks for the query to HCM virtual clinic.
I studied your query in full details updated from you.I understood your health concerns.
Based on your query data, In my opinion ,Dear You seem to suffer from Dercums Lipomatosis/disease,which is a benign heriditary disease.
A history of cancer would certainly keep you on Guard and ALERT.
Get
Biopsy of the painful lump on the right lower abdomen to confirm if its Lipoma or some thing else.
Chances of Cancer /
Liposarcoma in Lipoma is very rare,though should be kept in mind.
Other wise-keep a watch if any of this lipoma grows and or causes cosmtic or pressure complaints, for which it would need Surgical Excision biopsy that time.
Don't worry for this illness as it is harmless otherwise being a benign familial disease.
Hope this would resolve your query and worry and
Anxiety accompanied with it.
Welcome for any further query in this regard to ME.I would love to help you out.
Awaiting for any further query.
Wish you fast recovery from this intriguing health problem.
Have a Good Day.
Dr.Savaskar M.N.
M.S.Genl-CVTS -Senior Surgical Consultant