Clinical Outcomes of Ileostomy Closure According to Timing During Adjuvant Chemotherapy After Rectal Cancer Surgery

Yoo Jin Choi; Jung-Myun Kwak; Neul Ha; Tae Hoon Lee; Se Jin Baek; Jin Kim; Seon Hahn Kim

doi:10.3393/ac.2018.10.18.1

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Original Article Clinical Outcomes of Ileostomy Closure According to Timing During Adjuvant Chemotherapy After Rectal Cancer Surgery: Yoo Jin Choi, Jung-Myun Kwak, Neul Ha, Tae Hoon Lee, Se Jin Baek, Jin Kim, Seon Hahn Kim; Annals of Coloproctology 2019;35(4):187-193.
DOI: https://doi.org/10.3393/ac.2018.10.18.1
Published online: August 31, 2019

Division of Colorectal Surgery, Department of Surgery, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea

Correspondence to: Jung-Myun Kwak, M.D. Division of Colorectal Surgery, Department of Surgery, Korea University Anam Hospital, Korea University College of Medicine, 73 Inchon-ro, Seongbuk-gu, Seoul 02841, Korea Tel: +82-2-920-5323, Fax: +82-2-928-1631, E-mail: 'jmkwak@korea.ac.kr'

• Received: September 6, 2018 • Accepted: October 18, 2018

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Abstract
INTRODUCTION
METHODS
RESULTS
DISCUSSION
ARTICLE INFORMATION
REFERENCES

Abstract

Purpose
No guidelines exist detailing when to implement a temporary ileostomy closure in the setting of adjuvant chemotherapy following sphincter-saving surgery for rectal cancer. The aim of this study was to evaluate the clinical and oncological outcomes of ileostomy closure during adjuvant chemotherapy in patients with curative resection of rectal cancer.
Methods
This retrospective study investigated 220 patients with rectal cancer undergoing sphincter-saving surgery with protective loop ileostomy from January 2007 to August 2016. Patients were divided into 2 groups: group 1 (n = 161) who underwent stoma closure during adjuvant chemotherapy and group 2 (n = 59) who underwent stoma closure after adjuvant chemotherapy.
Results
No significant differences were observed in operative time, blood loss, postoperative hospital stay, or postoperative complications in ileostomy closure between the 2 groups. No difference in overall survival (P = 0.959) or disease-free survival (P = 0.114) was observed between the 2 groups.
Conclusion
Ileostomy closure during adjuvant chemotherapy was clinically safe, and interruption of chemotherapy due to ileostomy closure did not change oncologic outcomes.
Keywords: Rectal neoplasms; Ileostomy; Adjuvant chemotherapy

INTRODUCTION

A protective loop ileostomy is a temporary stoma made during a sphincter-preserving surgery for rectal cancer. It is often created to divert the fecal stream in order to protect the anastomosis and minimize the rate of anastomotic leakage, which has been shown in several randomized controlled trials [1, 2]. Recently, 2 meta-analyses demonstrated that the creation of a protective loop ileostomy reduced the leakage rates and number of reoperations, thus ameliorating the severity of anastomotic leakage [2, 3].

However, stoma-related complications are considerable and include dehydration caused by high output, electrolyte imbalance, peristomal dermatitis, parastomal hernia, and bowel obstruction [4, 5]. A patient’s overall quality of life (QoL) is compromised by stoma-related problems, such as frequent bag leakage and loss of privacy when emptying bags [4, 5]. Psychological problems also affect QoL, and patients report low sexuality and body image concerns stemming from difficulty wearing clothing and feeling unattractive [6, 7].

Therefore, an ileostomy should be reversed as early as possible to reduce stoma-related complications and improve patients’ QoL. However, there is no optimal time to reverse a temporary ileostomy. Several studies have reported the safety and feasibility of early stoma closure (within 2 weeks after initial surgery) with promising results [8-10]. On the other hand, other studies showed that complications were significantly associated with a shorter interval between primary operation and ileostomy closure [11, 12]. Generally, the available literature is scarce about the optimal timing for reversal of protective loop ileostomy, and it is typically reversed 8‒12 weeks after rectal cancer surgery [8].

During this interval period, some patients are receiving adjuvant chemotherapy, which usually lasts 4 to 6 months after surgery. Some studies suggest avoiding closure surgery during adjuvant chemotherapy [13, 14] because ileostomy closure during adjuvant chemotherapy can be dangerous for the following potentially valid reasons. First, there is concern whether chemotherapy disturbs proper wound healing of the ileostomy closure. Second, interruption or delay of chemotherapy due to ileostomy closure may alter chemotherapy’s effects and lead to inferior survival [15-17]. Additionally, if serious complications occur, the delay of adjuvant chemotherapy could be prolonged and the negative effects on survival and patient QoL intensified [18, 19].

Our colorectal department schedules ileostomy closure within three months after the initial surgery, regardless of adjuvant chemotherapy, if there is no more risk of anastomotic complication. Very few studies have been published about the feasibility of ileostomy closure during adjuvant chemotherapy [20, 21]. The aim of this study was to evaluate the clinical and oncological outcomes of ileostomy closure during adjuvant chemotherapy after curative resection of rectal cancer.

METHODS

Data was retrospectively extracted from a prospectively collected colorectal cancer database. This study was approved by the Institutional Review Board of Korea University Anam Hospital (approval number: 2018AN03000) and was eligible for exemption from informed consent.

Patients

Patients who were diagnosed with rectal adenocarcinoma and underwent sphincter-preserving surgery with total/partial mesorectal excision and temporary loop ileostomy for curative intent and received adjuvant chemotherapy at Korea University Anam Hospital (Seoul, Korea) between January 2007 and August 2016 were included.

Exclusion criteria were stage IV rectal cancers, ileostomy creation for management of leakage or any other complication of anastomosis after the initial surgery, and reoperation after the initial surgery. Patients who received radiotherapy postoperatively were also excluded.

Patients were divided into 2 groups according to timing of stoma closure: group 1 who underwent ileostomy closure during chemotherapy and group 2 who underwent ileostomy closure after completion of chemotherapy. Data from the 2 groups were compared for patient demographics, tumor characteristics, pathologic results, and operative and postoperative outcomes including survival.

Stoma closure scheduling

The timing of stoma closure was predominantly decided by the surgeon’s preference and the patient’s needs. Before closure, the anastomosis was evaluated with sigmoidoscopy and lower gastrointestinal (GI) series to confirm the absence of leakage, sinus, fistula, or any other problems. Lower GI series X-rays displayed the anastomotic sites after Gastrografin insertion into the rectum by a rectal tube.

If stoma closure was scheduled during adjuvant chemotherapy, surgery was considered after 3–4 cycles of chemotherapy and prepared in a routine manner. Patients for whom there was no suspicion of anastomotic problems underwent ileostomy closure 2 weeks after the last administration of chemotherapy. If they had no stoma closure complications, the next chemotherapy was given approximately 2 weeks after discharge.

Outcome measures

Rectal cancer was defined as pathologically-demonstrated adenocarcinoma located in the rectum, 15 cm or less from the anal verge on the rigid sigmoidoscope. The low rectum was defined as 2 to 7 cm from the anal verge, the mid rectum as 8 to 12 cm from the anal verge, and the upper rectum as 13 to 15 cm from the anal verge.

Postoperative complications after stoma closure and overall survival (OS)/disease-free survival (DFS) were analyzed to evaluate the feasibility of stoma closure during adjuvant chemotherapy. Other parameters, such as operative time, postoperative hospital stay, readmission, reoperation, and mortality related to ileostomy closure were also analyzed.

Postoperative complications after ileostomy closure were defined as any surgical or medical complications that developed within 30 days after stoma closure. OS was defined as the interval between the initial rectal cancer surgery and the last day of hospital follow-up in any department or death, if known. DFS was defined as the date of the first recurrence or the last day of follow-up examination related to rectal cancer.

Statistical analysis

Categorical variables are reported as numbers with percentages and were analyzed using the chi-square test or Fisher exact test. Continuous variables are described as mean and standard deviation and analyzed using the Mann-Whitney U-test. Survival analyses were performed by the Kaplan-Meier method. Differences between survival curves were analyzed by the log-rank test. Statistical analysis was performed using IBM SPSS Statistics ver. 22.0 (IBM Co., Armonk, NY, USA), and P-values less than 0.05 were considered statistically significant.

RESULTS

A total of 220 patients were selected for this study and divided into 2 groups: group 1 was composed of patients who received stoma closure during chemotherapy and group 2 was composed of patients who received stoma closure after chemotherapy. Group 1 comprised 161 patients and group 2 comprised 59 patients (Fig. 1). No differences were observed between the two groups in gender ratio, body mass index (BMI), preoperative chemoradiation, type of surgery, and surgical procedure (Table 1). Tumors located in the low rectum were more common in group 2. Although clinical TNM stage based on preoperative computed tomography and magnetic resonance imaging was not different, more advanced pathologic stage was observed in group 2, and the adjuvant chemotherapy regimen was different between the 2 groups.

No significant differences were observed in operative time, estimated blood loss, interval for resuming diet, or postoperative hospital stay (Table 2). Overall, 30-day postoperative complications were 8.7% in group 1 and 15.3% in group 2, which was not statistically different. Two patients from group 1 underwent reoperation; one patient had a re-ileostomy for rectovaginal fistula, and another had a bleeding control reoperation for hematochezia. Three patients from group 2 underwent reoperation; one patient had perianal abscess drainage and re-ileostomy for severe diarrhea, another had rectal strictureplasty for anastomosis stricture, and the third patient had re-ileostomy for rectourethral fistula. Two patients in group 1 and 5 patients in group 2 required readmission. Most readmissions were for postoperative ileus. No mortality after ileostomy closure was observed in the 2 groups.

The mean follow-up period was 53.7 ± 28.1 months in group 1 and 62.2 ± 31.2 months in group 2. No differences were observed in OS and DFS between groups 1 and 2 (P = 0.959 for OS, P = 0.114 for DFS). In a subgroup analysis according to the pathologic stage, there were no differences in OS and DFS in patients with ypStage II and ypStage III rectal cancers (Fig. 2).

DISCUSSION

This study compared the clinical and oncological outcomes between patients who underwent closure of a temporary ileostomy either during adjuvant chemotherapy or after chemotherapy. This study showed that there were no significant differences between the two groups in postoperative hospital stay, complications, and mortality. These results illustrated that ileostomy closure during chemotherapy was safe, and chemotherapy did not affect the surgical outcome of ileostomy closure. These findings suggest that stoma closure during chemotherapy can achieve a clinical safety level equal to stoma closure after chemotherapy. Therefore, closing a stoma during adjuvant chemotherapy seems to be safe and feasible. This result agrees with findings from previous studies [20, 21].

Temporary loop ileostomy is an indispensable choice for fecal diversion in order to protect an anastomosis and minimize the clinical significance of anastomotic leakage. However, an ileostomy frequently causes serious morbidity, decreases patient QoL, and may cause irreversible damage [7]. When considering patient QoL and morbidity, closing an ileostomy as early as possible is crucial, and early closure has been studied rigorously over the last decade [11, 12, 22].

However, adjuvant chemotherapy, which usually lasts 4 to 6 months after surgery in patients with advanced stage disease, must be considered. Although no confirmed guidelines have been suggested, the consensus is that ileostomy closure should be postponed until completion of adjuvant chemotherapy because some surgeons believe that chemotherapy may interrupt wound healing following ileostomy closure [13, 14]. Also, if ileostomy closure is performed during chemotherapy, the chemotherapy schedule should be interrupted. Possible serious postoperative complications may extensively delay chemotherapy resumption and thus reduce disease-free survival. For example, in our center, patients who underwent an uneventful ileostomy closure usually started their next chemotherapy about 4 weeks after the previous chemotherapy. As a result, chemotherapy was one cycle off for those patients, depending on their schedule. In Western countries, ileostomy closure is often further complicated in obese patients who may have more severe postoperative complications that extensively delay chemotherapy. Therefore, the feasibility of ileostomy closure during chemotherapy can be rationalized after clinical safety and oncological outcomes have been discussed among clinicians supported by evidence.

In one of the first studies on the timing of ileostomy closure, Tulchinsky et al. [20] reported that closure during chemotherapy did not worsen short-term outcomes, such as length of hospital stay, rate of ileostomy closure complications, and mortality. This result correlates with our study result of no significant differences in those 3 parameters between the 2 groups. They also provided evidence countering the assumption that ileostomy closure during chemotherapy might interrupt adjuvant treatment and influence disease recurrence. Their P-values for OS and for recurrence free survival were 0.35 and 0.95, respectively, agreeing with the rates reported in our study (P = 0.959, P = 0.114, respectively) which showed that delayed chemotherapy did not affect oncological outcomes.

However, the optimal timing of stoma closure in the setting of adjuvant chemotherapy remains controversial [8-12]. No randomized studies investigating the influence of chemotherapy interruption on oncologic outcomes have been published. Since adjuvant chemotherapy (including oxaliplatin) is considered to improve long-term survival in advanced rectal cancer [23, 24], serious complications after stoma closure can impair the completion of chemotherapy and lead to inferior survival. Further investigation is warranted.

The current study was limited by its retrospective nature with selection bias. Certain factors affected the patient’s and surgeon’s decision regarding the timing of ileostomy closure, and some patients chose to have their ileostomy closed during chemotherapy and others chose closure after chemotherapy. Two factors might explain this decision: surgeon preference and patient status. Most surgeons in this study routinely close an ileostomy during chemotherapy, although some surgeons prefer to perform ileostomy closure only after completion of chemotherapy. Regarding patient status, closure schedules were usually postponed until after chemotherapy for patients with anastomosis problems, such as pelvic abscess, anastomotic sinus, or fistula. In addition, a patient’s desire to close a stoma might affect the surgeon’s decision. Different types of chemotherapy recommended by different guidelines and insurance policies throughout the 10 years of this study are other limitations. Nevertheless, our study has strong advantages because there is only a very small amount of previous literature available on this subject. The total number of patients in this study (n = 220) was enough to have statistical power.

In conclusion, this report suggests that ileostomy closure during chemotherapy seems clinically safe and without negative effect on oncologic outcomes, possibly providing new insights into the feasibility of protective ileostomy closure during adjuvant chemotherapy. A well-planned prospective study to investigate how early stoma closure during chemotherapy positively affects patient QoL would be worthwhile.

ARTICLE INFORMATION

CONFLICT OF INTEREST

No potential conflict of interest relevant to this article was reported.

Fig. 1.

Case selection diagram showing inclusion and exclusion criteria. ^aTotal number of excluded patients is not equal to the sum of patients for each exclusion criterion.

Fig. 2.

Survival analysis between the 2 groups: (A) overall survival in all patients, (B) disease-free survival in all patients, (C) overall survival in patients with ypStage II, (D) disease-free survival in patients with ypStage II, (E) overall survival in patients with ypStage III, and (F) disease-free survival in patients with ypStage III.

Table 1.

Patient characteristics and demographics

Parameter	Group 1 (n = 161)	Group 2 (n = 59)	P-value
Age (yr)	59.4 ± 12.3	58.1 ± 10.7	0.474
Sex			0.666
Male	121 (75.2)	46 (78.0)
Female	40 (24.8)	13 (22.0)
ASA PS classification			0.285
I	55 (34.2)	27 (45.8)
II	102 (63.4)	31 (52.5)
III	4 (2.5)	1 (1.7)
Body mass index (kg/m²)	23.3 ± 3.2	23.3 ± 2.9	0.948
Tumor location			0.035
Upper rectum	10 (6.2)	0 (0)
Mid rectum	54 (33.5)	14 (23.7)
Lower rectum	97 (60.2)	45 (76.3)
Tumor height from anal verge (cm)	6.2 ± 2.9	5.2 ± 2.3	0.019
Preoperative chemoradiation			0.367
Yes	79 (49.1)	33 (55.9)
No	82 (50.9)	26 (44.1)
Type of surgery			0.425
Laparoscopic	71 (44.1)	21 (35.6)
Robotic	89 (55.3)	37 (62.7)
Conversion to open	1 (0.6)	1 (1.7)
Surgical procedure			0.520
High anterior resection	2 (1.2)	0 (0)
Low anterior resection	123 (76.4)	41 (69.5)
Intersphincteric resection	36 (22.4)	18 (30.5)
cTNM stage			0.948
I	8 (5.0)	3 (5.1)
II	16 (9.9)	5 (8.5)
III	137 (85.1)	51 (86.4)
ypTNM stage			0.049
0	2 (1.2)	0 (0)
I	7 (4.3)	2 (3.4)
II	79 (49.1)	18 (30.5)
III	73 (45.3)	39 (66.1)
Adjuvant chemotherapy			0.001
FOLFOX	75 (46.6)	43 (72.9)
FOLFIRI	2 (1.2)	0 (0)
FL	29 (18.0)	8 (13.6)
Oral 5-FU	55 (34.2)	8 (13.6)

Values are presented as mean ± standard deviation or number of patients (%).

Group 1, ileostomy closure during chemotherapy; group 2, ileostomy closure after chemotherapy; ASA PS, American Society of Anesthesiologist physical status; FOLFOX, folinic acid, FU, and oxaliplatin; FOLFIRI, folinic acid, FU, and irinotecan; FL, FU and leucovorin; FU, fluorouracil.

Table 2.

Perioperative outcomes of ileostomy closure

Parameter	Group 1 (n = 161)	Group 2 (n = 59)	P-value
Interval to ileostomy closure (day)			<0.001
Mean±SD	88.0 ± 27.6	201.8 ± 112.3
Median (range)	86.3 (14–173)	172.3 (91–813)
Operative time (min)	77.8 ± 106.3	96.3 ± 30.4	0.188
Estimated blood loss (mL)	11.2 ± 83.7	5.1 ± 39.1	0.591
Interval for resuming diet (day)	2.5 ± 1.2	3.2 ± 3.5	0.032
Postoperative hospital stay (day)	5.8 ± 3.3	8.0 ± 12.9	0.048
30-Day postoperative complication^a	14 (8.7)	9 (15.3)	0.159
Superficial SSI	1	2
Deep SSI	0	2
Leakage	0	0
Bleeding	1	0
Ileus	10	8
Deep vein thrombosis	0	1
Cerebrovascular infarction	1	0
Postoperative urinary retention	1	1
Wound hematoma	1	0
Long-term anastomotic complication	1 (0.6)	2 (3.4)	0.176^b
Anastomotic stricture	0	1
Rectourethral fistula	0	1
Rectovaginal fistula	1	0
Reoperation	2 (1.2)	3 (5.1)	0.121^b
Readmission	2 (1.2)	5 (8.5)	0.016^b
Mortality	0	0	NA

Values are mean ± standard deviation (SD) or number (%) unless otherwise indicated.

Group 1, ileostomy closure during chemotherapy; group 2, ileostomy closure after chemotherapy; SSI, surgical site infection; NA, not available.

^a The total number of patients who had postoperative complications is not equal to the sum of patients for each complication.

^b Fisher exact test.

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Clinical Outcomes of Ileostomy Closure According to Timing During Adjuvant Chemotherapy After Rectal Cancer Surgery

Ann Coloproctol. 2019;35(4):187-193. Published online August 31, 2019

DOI: https://doi.org/10.3393/ac.2018.10.18.1

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Figure

Clinical Outcomes of Ileostomy Closure According to Timing During Adjuvant Chemotherapy After Rectal Cancer Surgery

Fig. 1. Case selection diagram showing inclusion and exclusion criteria. aTotal number of excluded patients is not equal to the sum of patients for each exclusion criterion.

Fig. 2. Survival analysis between the 2 groups: (A) overall survival in all patients, (B) disease-free survival in all patients, (C) overall survival in patients with ypStage II, (D) disease-free survival in patients with ypStage II, (E) overall survival in patients with ypStage III, and (F) disease-free survival in patients with ypStage III.

Fig. 1.

Fig. 2.

Clinical Outcomes of Ileostomy Closure According to Timing During Adjuvant Chemotherapy After Rectal Cancer Surgery

Parameter	Group 1 (n = 161)	Group 2 (n = 59)	P-value
Age (yr)	59.4 ± 12.3	58.1 ± 10.7	0.474
Sex			0.666
Male	121 (75.2)	46 (78.0)
Female	40 (24.8)	13 (22.0)
ASA PS classification			0.285
I	55 (34.2)	27 (45.8)
II	102 (63.4)	31 (52.5)
III	4 (2.5)	1 (1.7)
Body mass index (kg/m²)	23.3 ± 3.2	23.3 ± 2.9	0.948
Tumor location			0.035
Upper rectum	10 (6.2)	0 (0)
Mid rectum	54 (33.5)	14 (23.7)
Lower rectum	97 (60.2)	45 (76.3)
Tumor height from anal verge (cm)	6.2 ± 2.9	5.2 ± 2.3	0.019
Preoperative chemoradiation			0.367
Yes	79 (49.1)	33 (55.9)
No	82 (50.9)	26 (44.1)
Type of surgery			0.425
Laparoscopic	71 (44.1)	21 (35.6)
Robotic	89 (55.3)	37 (62.7)
Conversion to open	1 (0.6)	1 (1.7)
Surgical procedure			0.520
High anterior resection	2 (1.2)	0 (0)
Low anterior resection	123 (76.4)	41 (69.5)
Intersphincteric resection	36 (22.4)	18 (30.5)
cTNM stage			0.948
I	8 (5.0)	3 (5.1)
II	16 (9.9)	5 (8.5)
III	137 (85.1)	51 (86.4)
ypTNM stage			0.049
0	2 (1.2)	0 (0)
I	7 (4.3)	2 (3.4)
II	79 (49.1)	18 (30.5)
III	73 (45.3)	39 (66.1)
Adjuvant chemotherapy			0.001
FOLFOX	75 (46.6)	43 (72.9)
FOLFIRI	2 (1.2)	0 (0)
FL	29 (18.0)	8 (13.6)
Oral 5-FU	55 (34.2)	8 (13.6)

Parameter	Group 1 (n = 161)	Group 2 (n = 59)	P-value
Interval to ileostomy closure (day)			<0.001
Mean±SD	88.0 ± 27.6	201.8 ± 112.3
Median (range)	86.3 (14–173)	172.3 (91–813)
Operative time (min)	77.8 ± 106.3	96.3 ± 30.4	0.188
Estimated blood loss (mL)	11.2 ± 83.7	5.1 ± 39.1	0.591
Interval for resuming diet (day)	2.5 ± 1.2	3.2 ± 3.5	0.032
Postoperative hospital stay (day)	5.8 ± 3.3	8.0 ± 12.9	0.048
30-Day postoperative complication^a	14 (8.7)	9 (15.3)	0.159
Superficial SSI	1	2
Deep SSI	0	2
Leakage	0	0
Bleeding	1	0
Ileus	10	8
Deep vein thrombosis	0	1
Cerebrovascular infarction	1	0
Postoperative urinary retention	1	1
Wound hematoma	1	0
Long-term anastomotic complication	1 (0.6)	2 (3.4)	0.176^b
Anastomotic stricture	0	1
Rectourethral fistula	0	1
Rectovaginal fistula	1	0
Reoperation	2 (1.2)	3 (5.1)	0.121^b
Readmission	2 (1.2)	5 (8.5)	0.016^b
Mortality	0	0	NA

Table 1. Patient characteristics and demographics

Values are presented as mean ± standard deviation or number of patients (%).

Table 2. Perioperative outcomes of ileostomy closure

Values are mean ± standard deviation (SD) or number (%) unless otherwise indicated.

Group 1, ileostomy closure during chemotherapy; group 2, ileostomy closure after chemotherapy; SSI, surgical site infection; NA, not available.

The total number of patients who had postoperative complications is not equal to the sum of patients for each complication.

Fisher exact test.