A distal pancreatectomy is a surgery that removes the left portion of the pancreas, specifically the body and tail. It’s one of two main operations on the pancreas, and it’s performed when a tumor, cyst, or other problem is located in that left side rather than in the head of the organ (which sits near the small intestine). The procedure often includes removal of the spleen as well, since the spleen sits directly against the tail of the pancreas and shares its blood supply.
Why This Surgery Is Performed
The most common reason for a distal pancreatectomy is a tumor in the body or tail of the pancreas, whether cancerous or benign. This includes pancreatic adenocarcinoma (the most common type of pancreatic cancer), neuroendocrine tumors, and cystic lesions that could become malignant over time. Beyond tumors, surgeons perform this operation for chronic pancreatitis that’s limited to the left side of the organ, pseudocysts involving the tail, trauma to the distal pancreas, and blockages or leaks in the pancreatic duct.
Whether the problem is cancerous matters enormously for what happens before and after surgery, but the operation itself follows the same general approach regardless of the underlying cause.
Open, Laparoscopic, and Robotic Approaches
Surgeons can perform a distal pancreatectomy three ways: through a large abdominal incision (open surgery), through several small incisions using a camera and long instruments (laparoscopic), or through small incisions with a robotic surgical system. Both minimally invasive approaches, laparoscopic and robotic, result in less blood loss and shorter hospital stays compared to open surgery. A randomized trial published in the British Journal of Surgery found a median hospital stay of 5 days after laparoscopic surgery versus 6 days after open surgery, with functional recovery reached a full two days earlier in the laparoscopic group.
Not every patient is a candidate for a minimally invasive approach. Large tumors, tumors that involve nearby blood vessels, or complex anatomy may require an open procedure. Your surgical team will determine which method is safest based on imaging and the specifics of your case.
What Happens to the Spleen
Because the spleen is physically attached to the tail of the pancreas and shares blood vessels with it, removing the spleen along with the pancreas is the default approach, especially for cancer. Across large surgical centers, spleen removal occurs in roughly 60 to 80 percent of distal pancreatectomies. Spleen preservation is possible in select cases, particularly for benign or low-grade lesions, and succeeds in about 30 to 58 percent of attempts depending on the center.
Spleen-sparing surgery isn’t an option when the splenic vein is blocked, when there are gastric varices (enlarged veins near the stomach), or when a pseudocyst or area of dead tissue extends into the area where the spleen connects to its blood supply. An enlarged spleen also rules out certain preservation techniques because the short gastric vessels can’t supply enough blood to a larger organ.
If you’re having your spleen removed, you’ll need vaccinations against pneumococcal disease, meningococcal disease, and Haemophilus influenzae type b at least two weeks before surgery, ideally four to six weeks before. The spleen plays a key role in fighting certain bacterial infections, so these vaccines are essential for long-term protection. A tetanus, diphtheria, and pertussis booster is also recommended on the same timeline.
Pancreatic Fistula: The Most Common Complication
The most significant risk after a distal pancreatectomy is a pancreatic fistula, which is a leak of pancreatic fluid from the cut edge of the remaining pancreas. This happens in 20 to 30 percent of patients, a rate that has remained stubbornly high despite decades of improvements in surgical technique. Most pancreatic fistulas are manageable and resolve on their own or with a drain left in place after surgery, but a clinically significant leak can trigger a cascade of problems.
When a fistula causes trouble, the complications include:
- Intra-abdominal abscess (25 to 55 percent of fistula cases)
- Delayed stomach emptying (2 to 24 percent)
- Bleeding (3 to 15 percent)
- Wound infection (3 to 11 percent)
- Hospital readmission (11 to 23 percent)
- Reoperation (3 to 6 percent)
Overall mortality from the surgery is low, between 0.5 and 4 percent, and most patients recover without serious issues. But the high fistula rate means your surgical team will monitor you closely in the days and weeks afterward, often sending you home with a surgical drain still in place.
New-Onset Diabetes After Surgery
The pancreas produces insulin, so removing a portion of it raises the risk of developing diabetes afterward. A systematic review of 1,731 patients found that 14 percent of people who had a distal pancreatectomy for benign or potentially malignant lesions developed new-onset diabetes. For those who had the surgery for chronic pancreatitis, the rate was significantly higher at 39 percent, likely because the disease had already damaged the remaining pancreas.
Among those who did develop diabetes after surgery, 77 percent required insulin rather than oral medications alone. This is an important consideration to discuss before the operation, since it represents a permanent change in how your body regulates blood sugar. Your doctors will monitor your glucose levels regularly after surgery and in the months that follow.
Recovery and What to Expect
After a laparoscopic distal pancreatectomy, most patients spend four to five days in the hospital. Open surgery typically adds a day or two. Functional recovery, meaning you can tolerate a regular diet, manage pain with oral medications, and move around independently, takes about four days after a laparoscopic procedure and six days after an open one.
Full recovery at home generally takes several weeks. You’ll start with a soft, low-fat diet and gradually return to normal eating as your digestive system adjusts. The remaining head of the pancreas continues producing digestive enzymes and insulin, so most people maintain adequate digestive function. Some patients need pancreatic enzyme supplements with meals if they notice fatty, oily stools or difficulty digesting food, a sign that the remaining pancreas isn’t producing enough enzymes on its own.
Survival Rates for Pancreatic Cancer
When the surgery is performed for pancreatic adenocarcinoma, outcomes depend heavily on how advanced the cancer is. For patients with localized disease, small tumors under 2 centimeters, no spread to lymph nodes, and no extension beyond the pancreas, complete surgical removal is associated with a five-year survival rate of 18 to 24 percent. While that number is sobering, it represents the best outcome available for pancreatic cancer, which is among the most aggressive cancers.
Even after a successful surgery, both local recurrence and spread to distant sites remain common. That’s why chemotherapy is recommended after the operation for nearly all pancreatic cancer patients. The surgery removes the visible tumor, and systemic treatment targets microscopic disease that may have already spread beyond the pancreas.