Abstract
Hernia surgery is the most common surgical procedure worldwide. Complications are very rare and usually manifest in recurrence or chronic pain. We report a rare case of mesh migration 14 years after initially complicated transabdominal preperitoneal plastic for left-sided inguinal hernia. The mesh migration resulted in a covered sigmoid perforation, which was completely asymptomatic and only noticed as a chance finding in a staging CT scan prior to irradiation therapy. However, after the onset of immunosuppressive therapy, an exacerbation of chronic, localized inflammation was expected. Therefore, open surgical anterior rectum resection was performed, and after a short hospital stay, the patient could be discharged home free of complaints. This case report aims to raise awareness of possible long-term complications of hernia repair when using non-absorbable meshes.
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Case Report
Inguinal hernia repair is one of the most common surgical procedures with estimated 20 million procedures per annum worldwide [1]. In addition to open hernia repair including reinforcement via mesh (e.g., Lichtenstein technique), transabdominal preperitoneal plastic (TAPP) is a widely accepted method for minimally invasive hernia repair. The International Endohernia Society (IEHS) values the latter as effective surgical treatment for inguinal hernia [2]. Open procedure or minimally invasive approach, however, hernia surgery is both easy and safe with a 30-day-mortality comparable with the population-standardized mortality rate and rare wound infections. The most common long-term complications are hernia recurrence, chronic pain, and infertility [3]. All these events are scarce, but very rarely, other complications can arise.
A 57-year-old patient presented with CT-suspected perforation in the sigmoid colon. However, the patient was in a good condition, and vegetative symptoms were negated. There were no known allergies, and drug ingestion was limited to antihypertensive drugs (i.e., bisoprolol, ramipril, torasemide, pantoprazole, and alendronate).
Fourteen years ago, he underwent laparoscopic hernia repair via TAPP, after rapidly progredient inguinal hernia left sided. Intraoperatively, the sigmoid was displaced in the hernial sac (i.e., sliding hernia) and most likely fused with the peritoneum in a long-stretched post-inflammatory manner, so that a wedge resection (ENDO-GIA 45 mm, Medtronic, Ireland) was necessary for mobilization. Next, the hernia gate was obturated via mesh (Prolene 10 × 15 cm, TiMESH, GfE Medizintechnik, Germany), which was fixed by fibrin glue (Tissucol, Baxter, USA). Finally, peritoneum was closed with absorbable ligating clips (Lapro-Clip, Covidien, Ireland). Anastasis was prolonged by constipation and stomach pain with sick leave for 3 months and weight loss of 10 kg. However, the condition returned, and he regained body weight without further diagnostic or treatment. One year further, he underwent complication-free TAPP (Ultrapro mesh) on the opposite side. According to the OP report (operated externally), the left side was unremarkable at this time. At the age of 55 years, following an acute bradycardic episode, dilated cardiomyopathy was diagnosed and consequently a cardio defibrillator implanted. However, recent endosonographic controls demonstrated normal ejection fraction. One year later, urologic check-up showed elevated PSA levels. Staging revealed prostate cancer (Gleason score, 4 + 5 = 9) with osseous metastases (cT2b cN0 cM1b). Due to the metastases and the cardiac prognosis, urologic decision was made to perform irradiation combined with antiandrogenic therapy. Furthermore, CT showed an unclear process in the sigmoid colon (Fig. 1), most likely a covered perforation and embedded coprolith in the sigmoid colon. Before initiating irradiation, anyhow, the sigmoid finding had to be clarified.
Therefore, we performed a colonoscopy that was extremely difficult due to severe angulations of the sigmoid colon. At 30 cm ab ano, the fibrin-occupied, locally limited insufficiency cavity was found; the supposed coprolith turned out to be the migrated mesh after TAPP 14 years ago (Fig. 2). An endoscopic removal was not successful. Therefore, an open surgical anterior rectum resection with partial parietal peritonectomy was performed. A large paraluminal and prevesical abscess cavity was removed in which the shrunken mesh was found partly migrated into the sigmoid colon and with close contact to the urinary bladder. Histology revealed a moderate florid and chronic fistulizing inflammation in the colon specimen (Fig. 3).
In the microbiological examination, positive results were found for Proteus vulgaris et penneri, Enterococcus species, Escherichia coli, and greening Streptococci. However, due to missing signs of generalized infection, the patient did not receive antibiotic therapy. The postoperative course was inconspicuous, and 5 days after surgery, rectoscopy revealed timely healing of the anastomosis, followed by the discharge of the patient.
Due to the high number of hernia repairs, there is great evidence for the common operation techniques. Concentrated techniques using a mesh are superior to those that can be summarized as “non-mesh” approaches (e.g., Shouldice technique) [4]. Nonetheless, mesh-related complications like infection or chronic pain are possible drawbacks after hernia surgery. Another complication represents the mesh migration; as a result of which, the mesh can erode surrounding tissue. Fortunately, such an event is rarely observed. Most case reports are related to erosion into the urinary bladder, resulting in dysuria, recurrent urinary tract infections, or suspected cancer [5,6,7,8,9]. Some cases have also been described in which the mesh has migrated into the intestine, depending on the location of the hernia to the cecum [10,11,12] or sigmoid colon [13, 14], respectively. In one case, mesh migration even resulted in mechanical bowel obstruction [15]. Because of the rarity, however, these cases include open inguinal hernia repair and ventral hernias. Additionally, all patients became present due to the symptoms associated with the migration.
Here, the mesh migration became conspicuous coincidentally 14 years after hernia repair. This is a relatively long latency, since most complications from mesh migration have already become noticeable in the period between 6 months and 3 years after initial hernia repair [9]. As another special feature of this case compared with those described in the literature, however, this patient did not show any symptoms, just like hernia recurrence, increased urinary infections, abnormal stool, abdominal pain, or inguinal discomfort. To the knowledge of the authors, this is the first report of an asymptomatic mesh migration. Anyhow, we expect the migrated mesh and the resulting abscess formation to become clinically present, at least with start of the irradiation.
Even 30 years after implementation of mesh containing approaches in laparoscopic hernia surgery, the reasons for implant migration are still unclear. What might have contributed to mesh migration here? A crucial role is attached to the mesh fixation. Here, fixation was done by fibrin glue, which is meant to be safe in endoscopic hernia repair [16]. Actual guideline recommends fixation of mesh after TAPP in primary inguinal hernia even only for large hernias (i.e., L III or M III following IEHS classification) [17].
Postoperative convalescence was delayed (obstipation, weight loss), which may have been a symptom of early mesh migration. Furthermore, the patient had a physically demanding job (construction) and has quickly returned to physical strain following the surgery. However, 1 year later during the laparoscopic hernia repair on the opposite side, a normal finding had been made, and a (traumatic) tearing of the mesh would have been more likely in the first weeks after surgery. With regard to the medication of the patient, alendronate is known to cause gastrointestinal side effects up to ulceration. However, it is very unlikely to be causative, since complications are frequently in upper gastrointestinal system [18]. In this case, wedge resection, which was performed at initial hernia repair due to adhesion, may play a decisive role in the genesis: the stapling suture could lead to erosion in the area of the abdominal wall and consecutive mesh detachment. However, literature recherche revealed no comparable report on this specific topic.
Regardless of the cause of mesh migration, one possible answer could be the implantation of (partially) absorbable meshes [19]. However, despite equivalent results, these still represent an exception due to the higher costs [20]. Further studies, especially on long-term outcomes as well as lower product prices, seem to be the prerequisite for change in practice. After all, hernia surgery is globally established, and both the open and the laparoscopic procedures and the meshes used are safe and effective with simultaneously low complication rate. However, mesh migration can be clinically “silent” for a long duration, as demonstrated, suggesting a higher dark figure. Therefore, physicians should be aware of the possibility of mesh migration and consider implantation of degradable mesh in case of difficult TAPP.
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Liedtke, K.R., Liedtke, C., Kleinwort, A. et al. Mesh Migration Results in Asymptomatic Sigmoid Perforation as Long-Term Complication After Difficult TAPP: a Case Report. SN Compr. Clin. Med. 2, 681–684 (2020). https://doi.org/10.1007/s42399-020-00276-2
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DOI: https://doi.org/10.1007/s42399-020-00276-2