Jaipur, July 8 -- Doctors at AIIMS Jodhpur successfully removed a 3.7-kg cancerous kidney tumour from a seven-year-old boy in a rare and highly complex six-hour surgery that also involved reconstructing the inferior vena cava (IVC), the body's largest vein on Tuesday. The child had been suffering from a progressively enlarging swelling on the right side of his abdomen for nearly four years. Although he had undergone chemotherapy earlier, the treatment was interrupted and the tumour continued to grow. After six weeks of preoperative chemotherapy at AIIMS Jodhpur, imaging revealed a massive tumour measuring 24 x 21 x 18 cm that had completely replaced the right kidney. According to the institute, the tumour had displaced vital organs, including the liver, pancreas, intestines and urinary bladder. The operation was led by Dr Rahul Saxena, additional professor in the Department of Pediatric Surgery, with support from Dr Anirudh Mathur and Dr Surender Patel from the Cardiothoracic and Vascular Surgery (CTVS) Department. During the surgery, doctors removed the entire diseased right kidney along with the ureter. The excised tumour measured approximately 21 x 20 cm and weighed 3.7 kg. Dr Rahul Saxena described the operation as one of the most technically demanding pediatric cancer surgeries performed at the institute, citing the tumour's size, involvement of a major blood vessel and distortion of the bodies normal anatomy. The child recovered well after surgery and has already received the first cycle of postoperative chemotherapy. AIIMS Jodhpur said the entire treatment-including chemotherapy, advanced diagnostic imaging, surgery, intensive care, hospitalisation and postoperative care-was provided free of cost under the Rajasthan government's Mukhyamantri Ayushman Arogya (MAA) Yojana....