Thanks for using the forum. I am happy to address your questions, and my answer will be based on the information you provided here. Please make sure you recognize that this forum is for educational purposes only, and it does not substitute for a formal office visit with your doctor.
Without the ability to examine you and obtain a history I can not comment on the reason for your back pain directly. But given your history of
RenalAcute kidney failure
Addison’s disease
Adrenal gland biopsy
Adrenalectomy
Cancer - renal pelvis or ureter
Catecholamines - blood
Chronic renal failure
Dialysis
End-stage kidney disease
Kidney diet - dialysis patients
Kidney stones cell carcinoma, it would be important to follow up with an oncologist to make sure you don't have metastases (remote cancerous tumors) if this hasn't been done already. It would obviously be important to bring imaging of your current cyst and certainly worthwhile to ask the questions you have above. They may want to do further work up including possibly further imaging with contrast if this hasn't been done already.
Cyst aside, the reason for you pain may be able to be further distinguished based on it's location, whether it radiates somewhere else, the
duration, the course (e.g. if it's getting better or worse), if you had any other trauma, etc. These items may be helpful in localizing the cause of your pain and possible it's treatment. I hope this is helpful.
I had a spinal MRI scan 18 months ago and several 'peri-neural' or Tarlov cysts were identified. One was described as large (several centimetres) and it even goes outside the perimeter of the scan, so has been incompletely imaged. These cysts are in the sacral area and I believe may be the reason I am now getting neurological problems - they are probably affecting nerve roots etc. Many of us are apparently born with these, but unless we have an MRI scan, they often remain there 'silently' and without problem. Most are asymptomatic.
I am not a doctor, but thought this might be helpful for you to know. By coincidence, when I was a teenager, my father had a huge cancerous tumour at the base of his spine. I believe that these are extremely rare. His had grown to such a size that it eventually enveloped all the nerves there. Before I go any further on this story, I want you to know that he is now in his late sixties and is fit and well! (Despite having had to learn to walk again after several operations to remove the tumour).
I would have thought that the scan would show the difference between what are believed to be relatively harmless (though this is debatable) Tarlov cysts like mine (which are filled with CSF I understand) and other types of cyst (eg cancer). I did tell the orthopaedic clinic that gave me my scan results about my family history of spinal cancer, and they absolutely assured me that they could see from the scan that mine are not cancerous cysts. (All I had done was an MRI, so as I say, they must be able to tell from that).
What I would say though, is that for years, my Father had been complaining of back pain (he is unbelievably brave and did not make a huge fuss), but was 'fobbed off' by his GP several times. His symptoms were not taken seriously and no scan or tests were ever done. The tumour grew over several years. It was not until Christmas Day 1980 when he woke up in indescribable pain, and an inability to move his legs at all, that the cancer was finally diagnosed.
Do not feel that you are 'making a fuss' by pursuing this (you have a good excuse to do so after the renal tumour), but because of what they can see on MRI scans, it sounds very hopeful that these have been 'interpreted' as safe and that you will be okay. Perhaps you have Tarlov cysts like me? They are quite common I understand.
Best wishes and good luck!
x
the nightmare continues.
kindest regards
Tammy Carter