Case Report Open Access
Copyright ©The Author(s) 2022. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Clin Cases. Aug 16, 2022; 10(23): 8406-8416
Published online Aug 16, 2022. doi: 10.12998/wjcc.v10.i23.8406
Metal stent combined with ileus drainage tube for the treatment of delayed rectal perforation: A case report
Si-Le Cheng, Lu Xie, Xiao-Feng Zhang, Li-Lan Lou, Hong-Zhang Shen, Department of Gastroenterology, The Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou 310000, Zhejiang Province, China
Si-Le Cheng, Hao-Wei Wu, Li-Lan Lou, Department of Gastroenterology, Zhejiang Chinese Medical University, Hangzhou 310000, Zhejiang Province, China
ORCID number: Lu Xie (0000-0001-7352-9245); Li-Lan Lou (0000-0001-6874-0257); Hong-Zhang Shen (0000-0002-1275-2862).
Author contributions: Cheng SL and Xie L assisted in the endoscopic procedure, drafted and revised the manuscript, and approved the final manuscript. They contributed equally to this work; Shen HZ and Wu HW drafted the manuscript and approved the final manuscript; Zhang XF conceived the study, assessed the severity of the patient's condition, performed most of the endoscopic procedures, revised and reviewed the manuscript, and approved the final manuscript; Lou LL conceived the study, assisted with the endoscopic therapy procedures and postoperative care, drafted and revised the manuscript, and approved the final manuscript; all the authors contributed to the article and approved the submitted version.
Supported by the Hangzhou Major Science and Technology Projects, No. 202004A14; the Hangzhou Medical and Health Science and Technology Plan, No. OO20190610 and No. A20200174; the Zhejiang Medical and Health Science and Technology Plan, No. WKJ-ZJ-2136 and No. 2019RC068; and the Natural Science Foundation of Zhejiang Province, No. LGF21H310004.
Informed consent statement: Written informed consent for the treatment plan was obtained from the patient. Written informed consent for the publication of this case report and accompanying images was obtained from the patient. Copies of the written consent forms are available for review from the editors of this journal.
Conflict-of-interest statement: The authors declare that they have no competing interests.
CARE Checklist (2016) statement: The authors have read the CARE Checklist (2016), and the manuscript was prepared and revised according to the CARE Checklist (2016).
Open-Access: This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See
Corresponding author: Li-Lan Lou, MNurs, Adjunct Associate Professor, Chief Nurse, Department of Gastroenterology, The Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, No. 4 Xueshi Road, Shangcheng District, Hangzhou 310000, Zhejiang Province, China.
Received: April 12, 2022
Peer-review started: April 12, 2022
First decision: May 9, 2022
Revised: May 18, 2022
Accepted: July 6, 2022
Article in press: July 6, 2022
Published online: August 16, 2022


Acute iatrogenic colorectal perforation (AICP) is a serious adverse event, and immediate AICP usually requires early endoscopic closure. Immediate surgical repair is required if the perforation is large, the endoscopic closure fails, or the patient's clinical condition deteriorates. In cases of delayed AICP (> 4 h), surgical repair or enterostomy is usually performed, but delayed rectal perforation is rare.


A 53-year-old male patient underwent endoscopic submucosal dissection (ESD) at a local hospital for the treatment of a laterally spreading tumor of the rectum, and the wound was closed by an endoscopist using a purse-string suture. Unfortunately, the patient then presented with delayed rectal perforation (6 h after ESD). The surgeons at the local hospital attempted to treat the perforation and wound surface using transrectal endoscopic microsurgery (TEM); however, the perforation worsened and became enlarged, multiple injuries to the mucosa around the perforation and partial tearing of the rectal mucosa occurred, and the internal anal sphincter was damaged. As a result, the perforation became more complicated. Due to the increased bleeding, surgical treatment with suturing could not be performed using TEM. Therefore, the patient was sent to our medical center for follow-up treatment. After a multidisciplinary discussion, we believed that the patient should undergo an enterostomy. However, the patient strongly refused this treatment plan. Because the position of the rectal perforation was relatively low and the intestine had been adequately prepared, we attempted to treat the complicated delayed rectal perforation using a self-expanding covered mental stent (SECMS) in combination with a transanal ileus drainage tube (TIDT).


For patients with complicated delayed perforation in the lower rectum and adequate intestinal preparation, a SECMS combined with a TIDT can be used and may result in very good outcomes.

Key Words: Endoscopic submucosal dissection, Complicated delayed rectal perforation, Delayed perforation, Transanal ileus drainage tube, Self-expanding covered metallic stent, Case report

Core Tip: In this case, the diagnosis of perforation was delayed, the nearby rectal mucosa and internal anal sphincter were extensively damaged. Rectoscopic or laparoscopic repair was difficult. The alternative approach is proximal enterostomy and subsequent stoma reversal. but the patient refused. The perforation was in the lower rectum, the bowel was well prepared. The treatment could be successful as long as the leakage of intestinal contents into the abdominal cavity were prevented, the wound was protected from contamination. The self-expanding covered mental stent covers the perforation, promotes repair and prevents the stenosis, and the transanal ileus drainage tube drains the intestinal contents. The combination achieved the goals.


Acute iatrogenic colorectal perforation (AICP) is a serious adverse event, but it is rare. The common causes of perforation include mechanical injury during colonoscopy insertion, deep cauterization during therapeutic colonoscopy, and intestinal wall tearing during endoscopic balloon dilation[1]. There is still no common method for treating AICP at present, and many factors affect the establishment of a treatment plan after perforation. In general, however, immediate AICP tends to require endoscopic closure by using through-the-scope (TTS) clips and over-the-scope clips (OTSCs)[2]. Immediate surgical repair is required if the perforation is large, if the endoscopic closure fails, or if the patient's clinical condition deteriorates. Delayed AICP (> 4 h) usually requires surgical repair or enterostomy[1]. Is there a novel treatment endoscopists could use help some patients who would otherwise need surgery or enterostomy avoid surgery? Here, we report a case of a complicated delayed rectal perforation after endoscopic submucosal dissection (ESD). We successfully placed a self-expanding covered mental stent (SECMS) in his rectum and a transanal ileus drainage tube (TIDT) in his colon distal to the stent, and he eventually avoided surgery and recovered well (Figure 1). This is the first time that a SECMS combined with a TIDT has been used to treat a complicated delayed rectal perforation after ESD.

Figure 1
Figure 1 Schematic. Self-expanding covered mental stent combined with transanal ileus drainage tube for the treatment of a complicated delayed rectal perforation.
Chief complaints

The patient is a 53-year-old man who was admitted to our hospital because of delayed perforation (> 6 h) after ESD of the rectum with a failed transrectal endoscopic microsurgery (TEM), and the patient had abdominal pain and fever.

History of present illness

The patient's out-of-hospital diagnosis was a laterally spreading tumor of the rectum, which was 25 mm × 20 mm in size and approximately 3-5 cm from the anus (Figure 2A and B). The patient eventually underwent rectal ESD, which was performed by an inexperienced endoscopist (fewer than 50 cases), at a local hospital. According to the operation records of the local hospital, there was considerable bleeding during the ESD procedure, and the wound surface was large. It was impossible to accurately determine whether there was a perforation during the procedure, so the endoscopist decided to close the wound surface with a purse-string suture technique (Figure 2C and D). However, the patient developed severe abdominal pain and fever (39.4 °C) six hours after ESD. A computed tomography (CT) scan performed at the local hospital indicated gas accumulation in the rectum and perineum. Considering the rectal perforation, the anorectal surgeons at the local hospital attempted to treat the perforation and wound surface with TEM. The wound surface was obviously congested and edematous. The anorectal surgeons first attempted to remove the clips and sutures. This operation resulted in worsening of the original perforation, enlargement of the perforation, multiple injuries to the mucosa around the perforation, partial tearing of the rectal mucosa and injury to the internal anal sphincter (Figure 3). Due to the significant bleeding, surgical suturing under direct vision was not possible. Hence, gauze and the anal canal were placed within the rectum, and the patient was transferred to our hospital for further emergency treatment.

Figure 2
Figure 2 Tumor morphology and postoperative wound management. A and B: Rectal laterally spreading tumor granular type (nodular mixed type), size of lesion 25 mm × 20 mm; C and D: Endoscopic submucosal dissection wound surface and purse-string suture.
Figure 3
Figure 3 Complicated delayed rectal perforation. A: Severe rectal injury, with a large amount of blood; B: The rectum is obviously perforated, and the surrounding wounds are reddened, bleeding and edematous; C: Multiple injuries to the mucosa around the perforation, and tearing of the rectal mucosa; D: A damaged internal anal sphincter.
History of past illness

The patient was previously in good health without any other underlying medical conditions.

Personal and family history

There have no difference.

Physical examination

The patient’s physical examination results were as follows: temperature of 37.7 °C (after intravenous injection of dexamethasone), pulse rate of 81/min, and BP of 155/100 mmHg. The patient had no cardiorespiratory symptoms, but he did have abdominal distension, muscle tension, middle and lower abdominal tenderness (+), rebound pain (+), significant swelling of the scrotum, hip, and perineum, and subcutaneous crepitus.

Laboratory examinations

The patient’s laboratory examination results were as follows: WBC of 11.6 × 109/L, neutrophil count of 82.1%, CRP level of 158 mg/L.

Imaging examinations

The CT from the local hospital showed that the patient had gas around the intestines and pneumatosis under the perianal, perineal and scrotal skin.

Opinions of the Anorectal Surgery Department

The anorectal surgery department suggested a proximal enterostomy, regular digital rectal examination during the period to prevent stenosis, and subsequent stoma reversal with a total treatment time of approximately 3 mo.

Opinions from the Gastroenterology Department

The gastroenterology department recommended isolating the wound surface, avoiding fecal contamination, and controlling infection. They also recommended preventing stricture of the rectal scar contracture.

Opinion of the patient

The patient was concerned that this operation would be traumatic and could significantly affect his quality of life, and the patient firmly refused to undergo surgery and enterostomy.

The final result of discussion was that if a cure was needed, two goals must be achieved: (1) Avoiding wound surface contamination by intestinal contents and infection caused by leakage into the abdominal cavity; and (2) Isolating the damaged wound surface so that it has enough time to heal and preventing rectal stenosis.

A SECMS and a TIDT could be used to help us achieve the abovementioned goals without the need for surgery.


Complicated delayed rectal perforation after ESD.

Day 1

The patient fasted and was administered anti-infection treatment. The patient was placed in the left lateral decubitus position under compound intravenous anesthesia. A SECMS was placed in the rectum to cover the rectal perforated area to prevent fecal contamination. Since the internal anal sphincter was also damaged, the end of the stent was exposed to the outside of the anus by approximately 1.5-2 cm, and it was convenient for fixation. Fortunately, the patient did not develop significant side effects associated with low-rectal SECMS, which include anal pain and tenesmus. The SECMS was able to achieve an expanded fit to the rectal wall. We believed that isolation of the perforated area was important to promote successful wound healing and to further reduce fecal contamination; thus, we also placed a TIDT through the colonoscope. The TIDT balloon was located approximately 10 cm distal to the stent, and 30 mL of sterile distilled water was injected into the balloon. The intestinal lumen was closed with a balloon to guide the intestinal contents derived from the proximal colon. The TIDT and the SECMS were finally fixed with medical tape (Figure 4). Continuous negative pressure (approximately 100 mmHg) was applied to the TIDT to remove the intestinal contents. In this case, the SECMS was 22 mm in diameter, 90 mm in usable length and 120 mm in total length (Sewoon Medical Co., Led. Chungcheongnam-do, South Korea). Its outer diameter was 22 Fr, and it was 120 cm in length (Create Medic Co., Dalian, Liaoning Province, China).

Figure 4
Figure 4 The self-expanding covered mental stent and transanal ileus drainage tube were inserted into the rectum. A: Self-expanding covered mental stent and transanal ileus drainage tube (TIDT) into the rectum; B: The end part of the stent is retained outside the body; C: The stent and TIDT were fixed with medical adhesive tape; D: X-rays confirm the correct placement of the stent and TIDT in the body.
Days 2-7

Fasting, anti-infection treatment, fluid replacement and parenteral nutrition support were continued, and the status of the stents and TIDT were observed every day. Negative pressure was continuously applied to the TIDT to reduce the intestinal pressure and to avoid fecal contamination of the wound surface. The TIDT was rinsed every day to avoid obstruction, and the stents and the TIDT were prevented from shifting. The dressing was changed regularly to keep the anal circumference clean (Figure 5).

Figure 5
Figure 5 Routine management of self-expanding covered mental stent and transanal ileus drainage tube. A: The status of the stents and transanal ileus drainage tube (TIDT) was observed daily; B: Continuous negative pressure drainage through TIDT; C: Keeping the perianal clean; D: The regular changing of the dressings to keep the stents and TIDT in a fixed state.
Day 11

The SECMS was removed, and the patient’s intestines were cleaned. The perforation and injury were almost unobservable (Figure 6A). The TIDT was not removed, and the patient began to consume a liquid diet. The patient's postoperative pathology was tubular-villous adenoma with some high-grade intraepithelial neoplasia (intramucosal carcinoma) (Figure 6B).

Figure 6
Figure 6 Removal of the metal stent and pathological findings. A: After the metal stent was removed, it was observed that the wound began to heal, and the perforation and significant injury were no longer present; B: Tubular-villous adenoma with part of high-grade intraepithelial neoplasia (intramucosal carcinoma), infiltrating the muscularis mucosae, and with clean margin.
Day 15

The TIDT was removed.

Day 17

A follow-up abdominal CT was performed, and the patient was discharged. During the treatment, beginning on Day 2, the patient’s body temperature returned to normal, and the patient’s abdominal pain and distension improved. The subcutaneous emphysema that was present in the patient’s buttocks and perineum gradually resolved. The hemogram gradually decreased to normal, and a total of four abdominal CT scans were obtained during hospitalization. A gradual decrease in the free gas in the pelvis could be observed (Figure 7).

Figure 7
Figure 7 The pelvic free gas gradually decreased in the patient. A: Day 2 computed tomography (CT), Metal tubular shadows were observed in the rectal lumen, and a lot of gas was observed around the intestinal canal; B: Day 5 CT: a lot of free air was trapped behind the peritoneum and in the pelvis, but this was slightly resolved on day 5, as compared the amount of air on Day 2 CT slice; C: Day 10 CT: The free air in the peritoneal cavity and behind the peritoneum was significantly reduced as compared with that on Day 5 CT slice; D: Day 17 CT: No clear manifestation of the original rectal stent was observed. A little amount of free air trapped in the pelvis was absorbed as compared with that on the Day 10 CT slice.

The patient occasionally had a small amount of bloody stool after discharge, but the patient had no other symptoms. On the 42nd day, the patient underwent a colonoscopy and recovered well (Figure 8).

Figure 8
Figure 8 Follow-up after discharge (Day 42). A: Observed from a distance, the wound surface was almost completely repaired; B: With close observation, some of the ulcers were still present; C: The rectum is slightly narrowed, but the endoscope can pass through; D: There was no obvious abnormalities in the distal intestinal mucosa.

Colonoscopy is generally considered a safe procedure, but even so, important adverse events such as AICP, which are usually serious, deserve our attention[1]. The probability of diagnostic colonoscopy perforation is 0.03%-0.8%, but the risk of therapeutic colonoscopy perforation is higher, especially with regard to colorectal ESD; the risk of therapeutic colonoscopy perforation is related to the lesion size, lesion location, patient history and operator experience[3]. Previous studies have reported a high rate of perforation ranging from 4% to 10%[1]. Usually, perforations can be identified early because most cases of perforation are obvious to the endoscopist, and delayed perforation is rare[4]. Because of the delayed diagnosis in these cases, the consequences are more serious. The treatment patterns for AICP have been changing[4]. Between 1996 and 2012, the rate of surgery to treat perforation was 93.3%, and the mortality rate was 8.3%. After 2012, the rate of surgery to treat perforation was 27.2%, and the mortality rate was 0%. The length of hospital stay was reduced from 6.9 to 4 d. Overall, advances in endoscopic closure have resulted in fewer surgical procedures.

The recommendations from the European Society of Gastrointestinal Endoscopy[1] suggest that endoscopic treatment should be considered immediately for AICP (< 4 h) due to the need for adequate bowel preparation. Small holes (< 10 mm) and TTS clips can be used, while OTSCs are recommended for large perforations. Furthermore, attempts to immediately close AICPs endoscopically depend on a variety of factors, including the size and cause of AICP, the endoscopist's experience, and the equipment available at the time. It has been reported that the success rate of TTS clips is 60% and that of OTSCs is 100%[4]. In the largest retrospective observation case series in Europe that evaluated perforation results, 83.3% of endoscopists observed cases of perforation that were successfully closed with TTS clips. In addition to the widely used TTS clips and OTSCs mentioned above, there are also reports that band ligation, purse-string sutures, and suture instruments can be used to endoscopically close AICPs[1,5-7]; however, the relevant research is limited. In this patient, whether perforation occurred during ESD could not be accurately determined, so the endoscopists chose to use purse-string sutures to completely close the wound. However, this treatment failed, resulting in a subsequent delayed perforation; therefore, the patient developed severe abdominal pain and fever.

The best management for delayed perforations (> 4 h), perforations with a large diameter, perforations with the presence of fecal contents, perorations associated with complicated or failed endoscopic closure, and perforations in patients with deteriorating clinical conditions is surgery[2,8,9]. Minimally invasive laparoscopic treatment of perforations has become the preferred surgical option and is now widely accepted and practiced. A prompt diagnosis of perforation is very important. If the diagnosis is made within 12 h, the fecal contamination is only approximately 30%. If the diagnosis is made 24 h after perforation, almost all patients will suffer from peritoneal fecal contamination, thus requiring a stoma. The average hospitalization time of patients undergoing surgery is 17.8 days[10]. TEM repair is also theoretically an approach for treating lower rectal perforation, but transrectal endoscopy may damage the anal sphincter[11-14]. This patient had an endoscopically observable injury to the internal anal sphincter. In our case, delayed perforation was diagnosed, the patient’s bowel had been adequately prepared before ESD, and the lesion site was relatively low and below the peritoneal reflection. The first choice was to repair the perforation through transrectal endoscopy. However, the TEM repair also failed and had serious consequences. Because of the conditions described above, both laparoscopic and laparotomy repair are almost impossible, and partial rectal resection and fecal diversion surgery would have been the only options for this patient. However, this surgery may be accompanied by a higher incidence risk, and there is also risk associated with the required general anesthesia. Additionally, the stoma may significantly reduce the quality of life of patients.

A covered stent has the potential to cover the wound surface. It is possible to reduce the leakage of fluid and bacteria into the tissue surrounding the rectum, thereby isolating the perforation area. Then, a covered stent can be easily removed. The placement of the stent can allow the perforation to heal in an appropriate manner, which can effectively reduce the possibility of scarring and stenosis. Another advantage of the stent is that it can effectively prevent the development of a proximal intestinal diversion stoma[15-19]. TIDTs with balloons have a very good therapeutic effect in the prevention and treatment of anastomotic leakage. The use of balloon to seal the intestinal lumen can guide the intestinal contents from the proximal colon and can isolate the anastomosis, which significantly reduces the contamination of the anastomosis site by feces and reduces rectal pressure during defecation to promote the healing of the anastomosis[20]. We designed an effective protocol using a SECMS combined with a TIDT for the treatment of this complicated delayed rectal perforation. This is the first report regarding the treatment of this condition.

It has been previously reported that the placement of an enteral stent during radical resection of rectal cancer can effectively prevent postoperative anastomotic leakage after the treatment of lower rectal cancer[13,14]. SECMSs have been reported to treat anastomotic leakage after colorectal cancer surgery[15], and the success rate of the treatment is 80%[16]. There are reports of the use of SECMSs to treat late rectal perforations after severe explosive injury[17]. The patient's injury was located in the middle of the rectum, the stent was easily inserted into the rectum, and the perforated area was completely covered by the SECMS at the end of the procedure. The patient eventually recovered. In this case, after the stent was placed, the perforation and wound surface of the patient were completely covered, and the liquid in the intestinal tract did not easily leak to the periphery of the rectum, thus protecting the wound surface and effectively preventing the occurrence of stenosis in the later stage.

In addition to stent therapy, studies have shown that TIDTs, which are placed 3-5 cm above the anastomosis, can be used to prevent anastomotic leakage after rectal cancer resection[14,18], and some studies have shown that anastomotic leakage cannot be prevented[19]. After the intestinal cavity is sealed by the balloon, artificial intestinal obstruction may occur, which easily promotes intestinal peristalsis, and the TIDTs are easily discharged. Therefore, perianal fixation of the drainage tubes is very important[20]. It is easy to wash and remove the contents of TIDTs, which can effectively maintain the cleanliness of the intestinal fluid at the anastomosis. In this case, a TIDT was placed in the patient for aspiration and irrigation during treatment, which effectively reduced rectal pressure, prevented contamination of the wound surface by fecal fluid, and promoted perforation repair.


In our case, we used both an SECMS and a TIDT to treat a complicated delayed rectal perforation after ESD, and this approach achieved successful coverage of the perforated area. This treatment helped to prevent fecal contamination of the wound and rectal stenosis. This protocol is suitable for patients with complicated delayed perforation in the lower rectum and with adequate intestinal preparation. A SECMS combined with a TIDT can be used and may achieve very good outcomes. Therefore, this case is a good reference for the future treatment of similar situations.


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