A CT scan of the patient clearly shows the growth on his right side

PETALING JAYA: A team of urological surgeons from the Serdang Hospital has removed a large renal tumour from a Malaysian man, believed to be one of the largest in the world.

The kidney tumour weighed 5.85kg, which is equivalent to the weight of two newborn babies.

The heaviest tumour was a case reported in New Delhi, India, last year, where a 7.4kg tumour was removed from a man.Successful operation: A CT scan showing the renal tumour on the patient. Surgeons took five hours to remove the tumour in October.Successful operation: A CT scan showing the renal tumour on the patient. Surgeons took five hours to remove the tumour in October.

The team of two urological surgeons and two trainees led by consultant urologist Dr Arun Arunasalam, assisted by Dr Chris Lee, took about five hours to remove the tumour in October, which grew within the man’s right kidney.

The rest of the kidney was also removed during the operation,

A normal kidney weighs about 120g-150g and 11cm in length and this tumour was about 50 times bigger in terms of volume.

“The CT scan revealed an unusual tumour. There was no debate that an intervention was needed. None of us had ever seen anything this extensive before.

“It is the largest-ever tumour in the world reported in terms of dimensions, ” Dr Arun said, adding that the surgery went smoothly without any complications.Dr Arun Aruna­salamDr Arun Aruna­salam

Known as a multicystic nephroma, the condition is more commonly seen in children, and is more prevalent in females among adults.

The 42-year-old Malaysian man who went to the hospital in August had complained about severe discomfort, loss of appetite and muscle mass, and a protrusion in his right abdomen.

He had complained about similar discomfort two years ago but did not seek treatment.

Dr Arun believes that it took two to four years for the tumour to grow to this size.

The growth caused compression of major vessels, pushed organs such as the bowel and liver to one side and protruded into the thoracic cavity, pushing the lung upward.

Fortunately, the tumour was benign and the patient returned home in less than a week.

The patient, who is from Negri Sembilan, even started work again before his clinic follow-up.

“He is lighter by 6kg and can sprint much faster now, ” Dr Arun quipped, adding that the next follow-up appointment with the patient is in six months’ time.

For Dr Arun, the case highlighted the importance of seeking prompt medical treatment at the onset of any symptoms.