Surgical clips can and occasionally do cause problems, though the vast majority stay in place for life without any symptoms. The complications that do arise fall into a surprisingly wide range: clips migrating into organs, triggering tissue reactions that mimic cancer recurrence, interfering with later imaging, or even eroding through the wall of the bowel. These events are individually rare, but the sheer volume of clip-based surgeries performed worldwide means that clinicians encounter them regularly enough to have built a sizable case literature around them. Understanding which problems are possible, and which surgeries carry the highest risk, helps you know what to watch for years or even decades after an operation.
Clip Migration After Gallbladder Surgery
Laparoscopic cholecystectomy (gallbladder removal) is one of the most commonly performed surgeries in the world, and clips are routinely placed on the cystic duct and cystic artery to seal them. In rare cases, those clips can work free and migrate into the common bile duct, the main channel that drains bile from the liver to the intestine. Once there, a clip can act as a seed around which bile stones form, or it can directly obstruct the duct and trigger an infection called cholangitis.
Case reports illustrate just how long the fuse can be. One documented case involved a metallic clip that migrated into the common bile duct of a patient who had undergone gallbladder removal a full 24 years earlier.1PubMed Central. Migration of a Surgical Clip Into the Common Bile Duct and Its Spontaneous Passage Another report described a woman who developed cholangitis from a migrated clip just two years after surgery.2PubMed Central. Surgical clips in the common bile duct suspected on endoscopic ultrasound and confirmed on endoscopic retrograde cholangiopancreatography Polymer Hem-o-lok clips, not just metal ones, have been found displaced in the bile duct as well, where they served as a core for stone formation and caused recurrent episodes of pain and infection.3PubMed Central. Hem-o-lok clip migration to the common bile duct after laparoscopic common bile duct exploration: A case report The clinical advice that emerges from these reports is straightforward: if you have a history of gallbladder surgery and develop upper abdominal pain, jaundice, or fever years later, clip migration should be on the list of possible explanations.
Tissue Reactions and False Cancer Scares
Your body sometimes treats a surgical clip as a foreign invader and walls it off with inflammatory tissue called a granuloma. This reaction can happen with both metal and polymer clips, and it creates a mass that on imaging can look disturbingly similar to a recurrent tumor or an enlarged lymph node. A case report involving a nonabsorbable polymer clip documented a granulomatous reaction that was initially mistaken for lymph node recurrence of cancer, a diagnosis that could have led to unnecessary treatment if the true cause had not been identified.4PubMed Central. Polymer clip granuloma mimicking lymph node recurrence: a case report
Metal clips carry their own version of this problem. A report documented a metal clip that caused a benign bile duct stricture 16 years after open cholecystectomy; pathology showed extensive fibrosis, chronic inflammation, and granuloma formation around the clip.5PubMed. Foreign body reaction to a metal clip causing a benign bile duct stricture 16 years after open cholecystectomy: report of a case Titanium clips used in brain aneurysm surgery have also been linked to delayed foreign body reactions, though these are described as extremely rare; cotton packing material used alongside the clips may contribute to the reaction in many of those cases.6Neurologia medico-chirurgica. Possible Delayed Foreign Body Reactions against Titanium Clips and Coating Materials after Unruptured Cerebral Aneurysm Surgery
The practical concern is misdiagnosis. A clip-related granuloma that mimics cancer can send a patient down an anxiety-laden diagnostic path involving repeat imaging, biopsies, or even reoperation. When a mass appears near a known clip site, the possibility that it is a foreign body reaction rather than a recurrence deserves serious consideration.
Interference with Imaging
Metallic clips left inside the body can distort later MRI scans and CT images. The clip itself is generally safe inside the MRI scanner (most modern surgical clips are made from non-ferromagnetic alloys that will not be pulled by the magnet), but the metal creates signal voids and distortions called susceptibility artifacts. These artifacts can obscure the very tissue a radiologist needs to evaluate. A study of metallic implants at 3-Tesla MRI strength found that artifacts could create clinical issues when the area of diagnostic interest was close to the implant.7PubMed Central. Assessment of MRI issues at 3-Tesla for metallic surgical implants: findings applied to 61 additional skin closure staples and vessel ligation clips Importantly, the clip’s mounting hardware can be a bigger offender than the clip itself: one evaluation of a breast biopsy marking clip showed that the clip produced only minimal artifact, while its metallic deployment sheath caused prominent signal distortion.8PubMed. Safety and MRI artifact evaluation at 1.5 T of metallic mounting sheath of a marking clip inadvertently deployed at stereotactic biopsy
On PET-CT scans used in cancer surveillance, clips can also create confusion. A study of patients who had undergone hernia repair with surgical mesh and clips found that metallic clips visible on CT at the surgical site, combined with surrounding inflammatory soft-tissue changes, suggested benign postoperative changes rather than disease recurrence.9PubMed. Postoperative changes after surgical mesh hernia repair: a pitfall in interpretation of 18F-FDG PET-CT Radiologists familiar with these patterns can usually distinguish clip-related artifacts from actual pathology, but the artifacts still add interpretive complexity and can delay diagnosis when they overlap with a region of concern.
Migration Into the Bowel and Beyond
Clip migration is not limited to the bile duct. Clips placed during a variety of abdominal and pelvic surgeries have been documented eroding into the gastrointestinal tract. A case involving tubal ligation clips found that two clips had eroded into the small bowel, creating an adhesion band that caused a bowel obstruction; the clips had also induced a stricture requiring surgical resection.10PubMed Central. Small Bowel Obstruction Secondary to Migration of Tubal Ligation Clips: A Case Report Inflammation around a surgical site can draw a clip into the bowel wall over time, eventually allowing it to pass through into the intestinal lumen.11Annals of Surgical Treatment and Research. Silent invasion of Hem-O-Lok clip
A particularly dramatic example involved a polymer vascular clip that migrated into the duodenum seven months after a laparoscopic right hemicolectomy for colon cancer. The patient presented with acute abdominal symptoms, and imaging revealed a chronically inflamed cavity with a fistula connecting to the duodenum.12European Surgery. Clip migration into the duodenum after laparoscopic oncological hemicolectomy—a case report Vascular complications are also possible: a metal cystic artery clip was reported to have eroded into the hepatic artery and produced a pseudoaneurysm, a potentially life-threatening ballooning of the vessel wall.13PubMed Central. The ‘nick’ or ‘clip’? A giant hepatic artery pseudoaneurysm complicating laparoscopic cholecystectomy
Clips in the Urinary System
Kidney and urologic surgeries that use polymer clips carry a specific risk: the clip can migrate into the collecting system (the internal plumbing of the kidney) or the ureter and act as a seed for kidney stone formation. A case after robot-assisted partial nephrectomy documented a Hem-o-lok clip that had migrated into the collecting system; two years later, the patient presented with flank pain and was found to have a 10-millimeter kidney stone that had formed around the clip.14PubMed Central. Stone formation from nonabsorbable clip migration into the collecting system after robot-assisted partial nephrectomy The stone had to be broken apart with laser lithotripsy before the embedded clip could be retrieved.
In another case, a Hem-o-lok clip migrated to the ureter after a partial nephrectomy and was initially misdiagnosed as a ureteral stone because its appearance on CT was deceptively similar.15PubMed Central. Migration of a Hem-o-Lok Clip to the Ureter Following Laparoscopic Partial Nephrectomy Presenting With Lower Urinary Tract Symptoms Migration into the renal pelvis following laparoscopic pyelolithotomy has likewise been documented, with the clip serving as a nidus for stone growth under prolonged exposure to urine.16PubMed Central. Hem-o-Lok clip migration into renal pelvis and stone formation as a long-term complication following laparoscopic pyelolithotomy: a case report and literature review The lesson here is that recurrent kidney stones or urinary symptoms in someone with a history of kidney surgery should prompt the clinician to consider a migrated clip as the underlying cause.
Tubal Ligation Clips and Chronic Pain
Filshie clips used in tubal ligation for female sterilization have their own well-documented migration profile. Migration of these clips is estimated to occur in roughly a quarter of all patients, though the vast majority of migrated clips never cause symptoms.17PubMed Central. Migrated Tubal Ligation (Filshie) Clip as an Uncommon Cause of Chronic Abdominal Pain In a small fraction, estimated at 0.1 to 0.6 percent of those who experience migration, the clips cause symptoms or extrude from unexpected locations including the anus, vagina, urethra, or abdominal wall. Symptoms range from chronic groin pain and perianal infection to chronic abdominal pain, and the timeline can stretch from as early as six weeks to over 21 years after the procedure.17PubMed Central. Migrated Tubal Ligation (Filshie) Clip as an Uncommon Cause of Chronic Abdominal Pain
Migrated clips in this context have caused abscess formation, fistulas, and adhesions at sites far removed from the fallopian tubes. One case involved a Filshie clip that presented as a bladder wall abscess 12 years after sterilization.18American Journal of Case Reports. An Unusual Case of a Filshie Clip Presenting as a Bladder Wall Abscess 12 Years After Sterilization Because the interval between surgery and symptoms can be so long, neither the patient nor the doctor may initially connect the complaint to a decades-old sterilization procedure.
Allergic and Hypersensitivity Reactions
Metal allergies affect a meaningful portion of the general population, and surgical clips are not exempt from triggering them. Clips composed of nickel or titanium alloys have been documented to produce hypersensitivity reactions after procedures like laparoscopic cholecystectomy.19PubMed Central. Rare Metallic Allergy Reaction Presentation to Cholecystectomy Surgical Clip Symptoms can include localized pain, swelling, rash, or persistent discomfort at the surgical site that does not resolve as expected after healing. Because metal allergy is rarely tested for before surgery, these reactions are usually diagnosed after the fact, sometimes requiring clip removal to resolve the symptoms.
Hernia repair offers another window into clip-related pain. A study comparing clip fixation to glue fixation for lightweight mesh in laparoscopic hernia repair found that patients who received clips had significantly more pain on postoperative days four and seven compared to those who received glue, and the only patient in the study who reported severe pain had clip fixation.20PubMed. Lightweight mesh and noninvasive fixation: an effective concept for prevention of chronic pain with laparoscopic hernia repair (TAPP) While this increased pain resolved over time in most patients, the finding underscores that clips in nerve-rich areas like the inguinal region carry a real risk of post-surgical discomfort that noninvasive alternatives may avoid.
Breast Biopsy Markers That Drift
Breast biopsies often involve placing a small marker clip at the biopsy site so that the area can be relocated for follow-up imaging or surgery. These clips serve a different purpose than the ligation clips used in abdominal surgery, but they carry their own set of problems. Immediate migration of these markers after placement is not a rare event, and its impact on future cancer management can be significant because a clip that drifts away from the biopsy cavity may lead the surgical team to target the wrong tissue.21PubMed Central. Immediate clip migration after breast biopsy: a meta-analysis for potential risk factors
An analysis of 268 stereotactic biopsy markers found that about 13 percent migrated at least one centimeter from the biopsy cavity, with some traveling as far as six centimeters. Factors associated with migration included fatty breast density and biopsies in the inner region of the breast, while a superior biopsy approach and t-shaped markers were associated with the clip staying put.22PubMed. Stereotactic core needle breast biopsy marker migration: An analysis of factors contributing to immediate marker migration Contemporary challenges with these markers also include allergic reactions to metallic components and difficulty seeing certain markers on ultrasound.23PubMed Central. Selection of Breast Biopsy Markers: Effect on Breast Imaging Procedures, Follow-up, and Costs
Device Failures by the Numbers
The scale of problems associated with surgical staplers and clip appliers is tracked by the FDA’s adverse-event reporting database. An analysis of that database found a total of more than 75,000 reported device malfunctions, over 21,000 injuries, and 676 deaths associated with the use of surgical stapler and clip applier devices.24PubMed. Mortality related to the use of stapler devices and clip appliers: Analysis of the Food and Drug Administration Manufacturer and User Facility Device Experience database Most deaths occurred after surgery rather than on the operating table, and the leading causes were vascular injuries and infection or sepsis. In the researchers’ root cause analysis, a device problem was the most commonly attributed cause of death, and the rate of mortality from device failure increased significantly over the study period even after adjusting for rising surgical volumes.24PubMed. Mortality related to the use of stapler devices and clip appliers: Analysis of the Food and Drug Administration Manufacturer and User Facility Device Experience database
These numbers need context. They represent aggregate reports across many years and millions of procedures, and the FDA database captures reports of suspected associations rather than confirmed causal links. Still, the trend line is concerning enough that researchers have called for closer scrutiny of device design and training protocols.
Absorbable Clips as an Alternative
One of the more practical questions people have is whether clips that dissolve in the body could avoid these problems altogether. Absorbable polymer clips have been available for decades, and some evidence supports their use. In a laparoscopic model, absorbable clips required significantly more force to dislodge than metallic clips along both axial and transverse directions, suggesting a more secure initial hold. Their strength did decline over time as the material degraded, retaining about 11 percent of original strength by day 21, but they were found to be effective for the intended purpose of sealing vessels and ducts.25PubMed. Comparison of titanium and absorbable polymeric surgical clips for use in laparoscopic cholecystectomy
A comparison in laparoscopic appendectomy found that absorbable clips performed comparably to metallic clips in terms of surgical time and postoperative complications, with the added advantage of leaving no permanent foreign body behind once the clip fully degrades. Researchers noted the benefit for later imaging, since metallic clips from previous surgeries can interfere with interpretation of X-rays, CT, and MRI.26Journal of Medical Sciences. A Comparison of Absorbable Polymetric Clips and Metallic Clips in Laparoscopic Appendectomy Despite these advantages, absorbable clips have not universally replaced metallic ones, partly because metallic clips remain cheaper, partly because surgeons are accustomed to them, and partly because certain situations demand the long-term strength that only a permanent clip provides.
Infection and Biofilm on Implanted Materials
Any permanent material left inside the body, including surgical clips, can serve as a surface for bacterial colonization. Bacteria that adhere to an implant can form a biofilm, a protective layer that makes the infection extremely difficult to clear with antibiotics alone. Research into spinal instrumentation, which often includes metal screws, rods, and polymer cages, has highlighted how biofilm formation on these implants is a driving factor behind persistent spinal infections.27PubMed Central. Ultrasound-triggered antibiotic release from PEEK clips to prevent spinal fusion infection: Initial evaluations The same principle applies to any permanent clip: while infection around a clip is uncommon, when it does occur, the clip’s surface can harbor bacteria that resist standard antibiotic treatment and may ultimately require surgical removal of the hardware to resolve the infection.
When Clips Slip During Brain Aneurysm Surgery
In neurosurgery, clips are used to seal off brain aneurysms by clamping across the neck of the ballooning vessel. The stakes of clip failure in this setting are extreme, because a clip that slips or twists can allow the aneurysm to re-open and bleed. Clip slippage is rare, but a documented mechanism involves the “scissoring” of the clip blades, a torsional failure that can occur even with modern cobalt alloy clips. In one reported case, intraoperative angiography caught the slippage in time for the surgeon to replace the clip, averting disaster. Measures to reduce this risk include careful dissection, decompression of the aneurysm when possible, proper clip selection, and routine intraoperative angiography to confirm the clip is holding.
Advances in surgical technology, including motor evoked potential monitoring, endoscope-assisted visualization, and dye-based angiography, now give neurosurgeons real-time feedback on clip placement, making intraoperative detection of problems more reliable than it was in earlier decades.
How Long After Surgery Can Problems Appear
One of the most striking themes across the case literature is the extraordinary time lag between surgery and symptoms. Bile duct obstruction from a migrated clip has been reported 24 years after gallbladder removal.1PubMed Central. Migration of a Surgical Clip Into the Common Bile Duct and Its Spontaneous Passage Tubal ligation clip complications have surfaced more than 20 years after sterilization.18American Journal of Case Reports. An Unusual Case of a Filshie Clip Presenting as a Bladder Wall Abscess 12 Years After Sterilization A tissue reaction causing bile duct narrowing appeared 16 years after open cholecystectomy.5PubMed. Foreign body reaction to a metal clip causing a benign bile duct stricture 16 years after open cholecystectomy: report of a case This timeline means that neither patients nor their current doctors may think to connect a new symptom to a surgery that happened in a different decade, or at a different hospital whose records are no longer easily accessible.
Keeping a personal record of any surgical clips placed during an operation, including the type and location, gives you a meaningful advantage. If unexplained abdominal pain, urinary symptoms, or imaging findings arise years later, that information can steer the diagnostic workup in the right direction much faster than starting from scratch.