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For a cancer in the middle of the rectum the bowel can usually be rejoined. Whether that join heals depends on its blood supply, on freeing enough colon to reach without tension, and on testing it before the abdomen is closed. Apollo Hospital, Bhat, Gandhinagar · Gota OPD, Ahmedabad.
Last updated: 5 October 2026
Shah’s Gastro, Cancer & Robotic Surgery Centre. Super-specialty training in surgical gastroenterology, two higher degrees in it, and 18 years of experience in GI and cancer surgery. Every rectal cancer is discussed at the tumour board before the operation and the approach are chosen.
A middle rectal cancer is removed by an anterior resection: the affected rectum is taken out with its fatty envelope and lymph nodes, and the colon is brought down and joined to the rectum that remains, so the patient keeps the normal passage.
The operation works in two places — high on the left side of the abdomen, where the main artery is divided and the colon is freed, and deep in the pelvis, where the rectum is removed. The robot reaches both from one set-up and adds a built-in fluorescence view of the blood flow to the join.
For a mid-rectal tumour in a roomy pelvis, keyhole surgery does the same operation well and costs less. The robot earns its place in a narrow pelvis, a heavier patient, a bulky tumour or a pelvis treated with radiotherapy.
The aim is a specimen that contains the tumour, the whole fatty envelope of the rectum down below it, and the lymph nodes along the main artery — removed in one piece, with a clear margin all around — followed by a join that heals.
For most tumours in the middle of the rectum, the entire mesorectum is removed down to the pelvic floor, because the lymph channels run downward inside it. The colon, freed and with a good blood supply, is then joined to the short cuff of rectum that is left. The pathologist grades the specimen, and the grade is part of how Dr Harsh Shah audits his own operations.
Whether chemotherapy or radiotherapy is given first is decided by the MRI at the tumour board, and the workup is covered on the robotic rectal cancer surgery page. This page is about the operation itself and the join.
In keyhole surgery the instruments are straight and the camera is held by an assistant. The robot gives the surgeon instruments that bend at the tip, a steady three-dimensional camera under his own control, and a third working arm — in the upper abdomen as well as in the pelvis.
Around the main artery the wristed instruments let the vessel be cleaned closely while the nerve network lying on the aorta is left untouched. In the pelvis the third arm holds the rectum up and forward so the plane behind it opens evenly, and the camera does not drift at depth. When the bowel is ready to be joined, the same robotic camera switches to a fluorescence view that shows, after an injection of dye, whether the end of the colon has a healthy blood supply.
None of this changes the cancer operation. The same rectum, the same envelope and the same nodes are removed as in open or keyhole surgery. What changes is the precision in the narrow places, and that matters most when the pelvis is narrow, the patient is heavier, or radiotherapy has stiffened the tissue.
Four thin robotic ports run in a line across the abdomen at about the level of the navel, with an assistant port for the stapler and suction. The robotic arms come from a single boom over the patient, aimed so they can work both up towards the spleen and down into the pelvis.
The operating table is linked to the robot, so the patient can be tilted head-down for the pelvis or turned for the upper abdomen without removing the instruments. In a tall patient, if more reach is needed towards the spleen, the arms are re-aimed rather than forcing the angle. The stoma nurse marks a possible ileostomy site before surgery, and a port is often placed exactly there.
Padding, warming and positioning are completed before docking. If the plane becomes unsafe or bleeding is better controlled by hand, the arms are undocked and the operation continues open — a step consented for beforehand, and judgement rather than failure.
The main artery to the rectum and lower colon is divided close to its origin so that the lymph nodes along it come away with the specimen. Whether it is divided at its very root or just below the first branch to the left colon is chosen on the nodes and on the blood supply the join will need.
Keeping that first branch can help the blood flow to the end of the colon that will be joined; dividing at the root clears every node along the artery. The choice is made for each patient, and both are standard. Either way, the artery is cleaned with fine wristed instruments while the thin web of nerves lying on the front of the aorta — nerves that matter for ejaculation and bladder function — is left in place.
Further down, at the brim of the pelvis, two nerve trunks run into the pelvis behind the rectum. The dissection behind the mesorectum keeps them intact, in the loose natural plane that the gas pressure and the robot’s camera show clearly.
A join that is pulled tight heals poorly. For a middle rectal cancer, the colon usually has to be freed all the way up to its bend near the spleen so that it reaches deep into the pelvis loosely, with its blood supply intact.
With the robot this is done from the inside out: the vein from the left colon is divided near the pancreas, the space behind the colon is opened along the lower border of the pancreas, and the attachments near the spleen are released last. Doing it in the same docking as the pelvic work, with the table re-tilted, avoids a second set-up and keeps the operation in one flow.
The rectum is divided below the tumour with a stapler, aiming for as few firings as possible because each extra staple line adds risk. The robot’s articulated stapler and the third arm’s steady hold let that line be placed squarely across the rectum in the pelvis.
The colon end is checked with the fluorescence view before it is cut: a dye injected into a vein lights up healthy bowel within moments, and an area that stays dark is trimmed back until the edge glows. The join is then made with a circular stapler passed through the anus, and the two rings of tissue it cuts are checked to be complete.
Finally the join is tested. The pelvis is filled with saline and air is gently passed through the anus while a scope looks from inside; any bubble means a stitch is added there and then. A pelvic drain is placed. Whether a temporary ileostomy is needed to protect the join is decided by how low it lies, whether radiotherapy was given and how the testing went — and it is discussed with you before surgery.
All three approaches remove the same rectum, envelope and nodes and aim for the same join. The differences lie in how each handles the artery, the bend near the spleen and the mid-pelvis, in recovery, and in cost.
| Open | Keyhole (laparoscopic) | Robotic | |
|---|---|---|---|
| Incision | Long midline cut | Small ports and one short cut low down | Small ports and one short cut low down |
| Controlling the main artery | Direct, by hand | Straight instruments; careful work near the nerves on the aorta | Wristed instruments clean the artery closely, away from the nerves |
| Freeing the bend near the spleen | Needs an upward extension of the wound | Demanding in a tall patient | Done in the same docking; the table can be re-tilted with the arms in place |
| Mid-pelvic dissection | Good view only with a long wound | Good in a roomy pelvis | Steady three-dimensional view and a third arm holding the rectum |
| Checking blood flow to the join | Separate fluorescence equipment | Separate fluorescence camera | Fluorescence view built into the robotic camera |
| Blood loss | Highest | Low | Low |
| Lymph nodes removed | The same field: the mesorectum and the nodes along the main artery | The same | The same |
| Hospital stay and return to work | Longest; the wound limits lifting and work | Shorter | Similar to keyhole |
| Time in theatre | Shortest | Longer | Longest |
| Cost | Lowest | Moderate | Highest |
| Suited to | A tumour grown into a neighbouring organ, or a patient who cannot tolerate a long gas-filled operation | A mid-rectal tumour in a roomy pelvis with favourable anatomy | A narrow pelvis, a heavier patient, a bulky tumour or a pelvis after radiotherapy |
In the published trials, robotic and keyhole rectal surgery give the same cancer results. The robot’s gains are largest where the pelvis or the patient makes keyhole surgery difficult; for a favourable mid-rectal tumour the honest advice can be keyhole surgery.
For a mid-rectal tumour in a roomy pelvis, in a slim patient, without radiotherapy, keyhole surgery in experienced hands performs the same operation with the same quality and at lower cost. Dr Harsh Shah will tell you if that is your situation, rather than recommend the robot by default.
The robot is recommended where it changes the difficulty: a narrow male pelvis, a heavier patient, a bulky tumour, or tissue stiffened by radiotherapy. Open surgery is chosen when the tumour has grown into a neighbouring organ that must come out in one block with it, or when heart or lung disease makes a long operation with gas and a head-down tilt unwise. Those choices are made at the tumour board and with the anaesthetist before the day.
Recovery follows an enhanced-recovery pathway: sitting out the same evening, drinking that day, eating and walking from the first day, the urinary catheter out early, and the drain removed once it runs clear.
The days to watch most closely are from about the third to the seventh: fever, a fast pulse, pain in the pelvis or rectum, or a patient who was improving and then is not. Any of these means nothing by mouth, a CT scan with contrast and the consultant informed at once — never observed overnight.
Bowel habits change after any rectal join: motions may be more frequent and urgent for some months while the new reservoir adapts. Diet, pelvic floor exercises and simple medicines help, and progress is reviewed at each follow-up visit. If a temporary ileostomy was made, it is usually closed a few months later after a contrast study confirms the join has healed.
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“We consulted Dr. Harsh Shah for rectal cancer treatment and had a very good experience. He is a very experienced and knowledgeable doctor who explained the treatment process clearly and guided us at every step. His supportive nature and professional approach gave us confidence throughout the treatment. We are grateful for his dedication and the care provided by him and his team. Highly recommended for rectal cancer treatment in Ahmedabad.”
★★★★★
“Met with Dr. Harsh Shah for the consultation of one of my relative. Dr. Harsh Shah is an exceptional surgical oncologist in Ahmedabad. His expertise in treating complex GI cancers like liver, pancreas, and colon cancers is truly remarkable. He explains everything clearly and gives patients full confidence in their treatment. Highly recommended for anyone looking for a skilled and compassionate cancer specialist.”
★★★★★
“My wife was suffering from colon cancer. Dr harsh shah performed her surgery 1 year back. And now she is cancer free with the grace of almighty and dr harsh shah’s treatment. He treats patients as his own family member. I may blindly tell any patient to approach him. Dr. harsh. Thank you is not enough. My sincere gratitude for all the help and advice you have given to us!”
Unedited Google reviews from patients and families, quoted exactly as written (the first from a patient treated for rectal cancer), and a patient speaking after rectal cancer surgery.
Mamta Somar · Google review
Nagesh Patidar · Google review
Joseph Sibi · Google review
A robotic anterior resection costs more than an open or keyhole one, because of the robotic instruments used in each case and the longer theatre time; the fluorescence dye, a stoma if one is needed and its later closure add to the total. The office prepares a written estimate before admission.
Cashless admission is arranged at Apollo Hospital, Bhat where your policy allows it, and the pre-authorisation paperwork is prepared by the office. Ask whether your policy covers robotic surgery and up to what limit. Bring the policy documents, photo identity, all reports with the MRI on disc, and a list of current medicines, including any blood thinners.
So the colon can reach deep into the pelvis without being stretched. A join under tension heals poorly; freeing the bend near the spleen gives the extra length while keeping the blood supply intact.
A fluorescence check. A dye injected into a vein makes healthy, well-supplied bowel glow on the robotic camera. If the end of the colon does not glow well, it is trimmed back before the join is made.
Not always. A temporary ileostomy is advised when the join is very low, after radiotherapy, or if the testing raises concern. It is discussed before surgery and is usually closed a few months later.
It depends on your pelvis and build more than on the tumour itself. In a roomy pelvis keyhole surgery gives the same result at lower cost. In a narrow pelvis, a heavier patient or after radiotherapy, the robot makes the hardest steps more precise.
The nerves near the main artery and behind the rectum are deliberately preserved, and the robot's view helps. Some change can still occur, more so after radiotherapy; your own risk is discussed at consent and reviewed at follow-up.
The team watches for fever, a fast pulse, pain in the pelvis or rectum, or a stall in recovery, mostly in the first week. At home, any of these means calling the same day; the team will arrange a scan rather than wait.
Shah’s Gastro, Cancer & Robotic Surgery Centre — Gota, Ahmedabad
Consultation, review of MRI, CT and pathology reports, second opinions, follow-up and surveillance.
Google: 4.9 · 52 reviews
Apollo Hospital — Bhat, Gandhinagar
Admission, robotic and open surgery, and inpatient care.
Google: 5.0 · 25 reviews
Patients travel for rectal cancer surgery from across Gujarat, southern Rajasthan and western Madhya Pradesh.
Send the pelvic MRI, CT and biopsy reports ahead of your appointment so the consultation starts with them already read. The operation and the approach are decided at the consultation after examination and at the tumour board. Call +91-63590-11009 WhatsApp the office
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