Surgicel is designed to be absorbed by the body after surgery, but the manufacturer explicitly recommends removing excess material once bleeding has stopped. For the powder form, this is done with irrigation and gentle aspiration. For the fabric forms, any material beyond what’s needed for clot formation should be carefully lifted away before the surgical site is closed. The key principle: use only as much as necessary, and remove everything that isn’t actively controlling bleeding.
Why Surgicel Should Be Removed
Surgicel is made from oxidized regenerated cellulose, a plant-based material that the body gradually breaks down. Small amounts are typically absorbed within 10 to 14 days, though larger quantities can take four to eight weeks or longer. Some imaging studies have detected Surgicel more than a month after surgery. Because it swells as it absorbs blood and fluid, material left behind in tight spaces can press on surrounding structures and cause problems.
The manufacturer’s instructions are direct: Surgicel must always be removed after bleeding stops when it’s been used in or near bony openings, confined spaces around bone, the spinal cord, or the optic nerve. In these locations, swelling can exert dangerous pressure. In spinal surgery specifically, compression of the nerve bundle at the base of the spine (cauda equina) and the protective sac around the spinal cord are the most commonly reported neurological complications from retained material.
How Excess Surgicel Is Removed
The removal technique depends on which form of Surgicel was used. For the powder version, the standard approach is irrigating the area with sterile saline or water and then gently suctioning away the white powder visible on tissue surrounding the bleeding site. The goal is to clear excess material without disturbing the clot that has already formed underneath.
For fabric-style Surgicel (the knitted or fibrillar sheets), the surgeon lifts or peels away any pieces that aren’t directly incorporated into the clot. This needs to be done carefully, since pulling too aggressively can restart bleeding. If the material was used to temporarily line an open wound cavity, it should be irrigated out with sterile water or saline once hemostasis is confirmed.
Any Surgicel near surgical drains should also be removed before closure, because retained material can swell and block the drain.
What Happens When Surgicel Is Left Behind
In many cases, small amounts of retained Surgicel absorb without incident. But when too much material remains, or when it’s left in a sensitive location, complications can develop. The most common is a foreign body reaction, where the immune system walls off the material and forms a mass called a granuloma. About 40% of these foreign body reactions are diagnosed within the first year after surgery, but half aren’t discovered until five or more years later, sometimes causing symptoms that seem unrelated to the original procedure.
Symptoms depend on where the granuloma forms. Reported cases include pelvic pain, urinary irritation, and neurological deficits from spinal cord compression. In one published case, a Surgicel granuloma near the ovary was initially mistaken for ovarian cancer.
How Retained Surgicel Appears on Imaging
One of the trickiest aspects of retained Surgicel is that it can look like something far more serious on CT or MRI scans. On MRI, Surgicel by itself appears as a mass with signal characteristics that shift depending on how much blood it has absorbed. When mixed with fresh blood, it produces a confusing patchwork of bright and dark areas that can closely resemble a residual tumor or an abscess.
The inflammatory reaction around retained material can also pick up contrast dye during imaging, further mimicking a tumor. Multiple published case reports describe surgeons and radiologists initially interpreting retained Surgicel as recurrent cancer, particularly in brain tumor cases in children. Restricted diffusion on MRI, a finding often associated with abscesses or highly cellular tumors, has also been observed around retained Surgicel.
If you’ve had surgery where Surgicel was used and a follow-up scan shows a new mass near the surgical site, this possibility is worth raising with your medical team. Awareness of Surgicel’s imaging characteristics can prevent unnecessary re-operation or biopsy.
Reducing the Risk of Complications
The simplest way to avoid problems is to follow the manufacturer’s core guidance: use the minimum amount needed, and remove excess once bleeding stops. Surgeons working in confined anatomical spaces, particularly around the spine, skull base, and orbits, need to be especially thorough about clearing unused material before closing.
For patients, the practical takeaway is knowing that Surgicel was used during your procedure. This information matters if you develop unexplained symptoms weeks or months later, or if follow-up imaging shows something unexpected near your surgical site. Retained hemostatic material is a well-documented cause of imaging findings that mimic tumors, abscesses, and other serious conditions, and recognizing this possibility can save you from unnecessary worry or additional procedures.