Toxic megacolon: ultimate fate of patients after successful medical management

Surgical Emergencies in Inflammatory Bowel Disease

Inflammatory bowel disease (IBD) patients are at risk for undergoing emergency surgery for fulminant disease, toxic megacolon, bowel perforation, intestinal obstruction, or uncontrolled gastrointestinal hemorrhage. Unfortunately, medical advancements have failed to significantly decrease rates of emergency surgery for IBD. It is therefore important for all acute care and colorectal surgeons to understand the unique considerations owed to this often-challenging patient population.

State-of-the-art surgery for ulcerative colitis

Ulcerative colitis (UC) is an autoimmune-mediated colitis which can present in varying degrees of severity and increases the individual’s risk of developing colon cancer. While first-line treatment for UC is medical management, surgical treatment may be necessary in up to 25–30% of patients. With an increasing armamentarium of biologic therapies, patients are presenting for surgery much later in their course, and careful understanding of the complex interplay of the disease, its management, and the patient’s overall health is necessary when considering he appropriate way in which to address their disease surgically. Surgery is generally a total proctocolectomy either with pelvic pouch reconstruction or permanent ileostomy; however, this may need to be spread across multiple procedures given the complexity of the surgery weighed against the overall state of the patient’s health. Minimally invasive surgery, employing either laparoscopic, robotic, or transanal laparoscopic approaches, is currently the preferred approach in the elective setting. There is also some emerging evidence that appendectomy may delay the progression of UC in some individuals. Those who treat these patients surgically must also be familiar with the numerous potential pitfalls of surgical intervention and have plans in place for managing problems such as pouchitis, cuffitis, and anastomotic complications.

WSES-AAST guidelines: management of inflammatory bowel disease in the emergency setting

BACKGROUND

Despite the current therapeutic options for the treatment of inflammatory bowel disease, surgery is still frequently required in the emergency setting, although the number of cases performed seems to have decreased in recent years. The World Society of Emergency Surgery decided to debate in a consensus conference of experts, the main pertinent issues around the management of inflammatory bowel disease in the emergent situation, with the need to provide focused guidelines for acute care and emergency surgeons.

METHOD

A group of experienced surgeons and gastroenterologists were nominated to develop the topics assigned and answer the questions addressed by the Steering Committee of the project. Each expert followed a precise analysis and grading of the studies selected for review. Statements and recommendations were discussed and voted at the Consensus Conference of the 6th World Society of Emergency Surgery held in Nijmegen (The Netherlands) in June 2019.

CONCLUSIONS

Complicated inflammatory bowel disease requires a multidisciplinary approach because of the complexity of this patient group and disease spectrum in the emergency setting, with the aim of obtaining safe surgery with good functional outcomes and a decreasing stoma rate where appropriate.

Toxic Megacolon: Background, Pathophysiology, Management Challenges and Solutions

Toxic megacolon (TM) is one of the fatal complications of inflammatory bowel disease (IBD) or any infectious etiology of the colon that is characterized by total or partial nonobstructive colonic dilatation and systemic toxicity. It is associated with high morbidity and mortality, and surgical management is necessary for the majority of the cases. An accurate history and physical examination, plain radiographs of the abdomen, sigmoidoscopy, and, most important of all, awareness of the condition facilitate diagnosis in most cases. Operative intervention is warranted when massive hemorrhage, perforation, or peritonitis complicate the clinical scenario or medical therapy fails to control the disease. We sought to review the management challenges of TM and its possible management strategies in this article.

Fulminant Colitis and Toxic Megacolon

Toxic megacolon may be a complication of various forms of fulminant colitis. The high mortality associated with unattended toxic megacolon signifies the impor tance of early detection. The removal of potential pre cipitating factors, along with aggressive medical sup port, may prevent the need for surgical intervention. Treatment of patients with toxic megacolon should in clude immediate resuscitative measures, use of nasogas tric suction, and administration of antibiotic and intrave nous steroids. Vigorous replacement of fluid and blood to stabilize and maintain blood pressure and an ade quate central venous pressure is critical. A period of observation of 24 to 48 hours should be undertaken, during which time clinical assessment and serial radio graphs should be used to gauge improvement. If there is either deterioration or no improvement, surgery should be performed without delay.

Toxic megacolon

Toxic megacolon represents a dreaded complication of mainly inflammatory or infectious conditions of the colon. It is most commonly associated with inflammatory bowel disease (IBD), i.e., ulcerative colitis or ileocolonic Crohn's disease. Lately, the epidemiology has shifted toward infectious causes, specifically due to an increase of Clostridium difficile-associated colitis possibly due to the extensive (ab)use of broad-spectrum antibiotics. Other important infectious etiologies include Salmonella, Shigella, Campylobacter, Cytomegalovirus (CMV), rotavirus, Aspergillus, and Entameba. Less frequently, toxic megacolon has been attributed to ischemic colitis, collagenous colitis, or obstructive colorectal cancer. Toxic colonic dilatation may also occur in hemolytic-uremic syndrome (HUS) caused by enterohemorrhagic or enteroaggregative Escherichia coli O157 (EHEC, EAEC, or EAHEC). The pathophysiological mechanisms leading to toxic colonic dilatation are incompletely understood. The main characteristics of toxic megacolon are signs of systemic toxicity and severe colonic distension. Diagnosis is made by clinical evaluation for systemic toxicity and imaging studies depicting colonic dilatation. Plain abdominal imaging is still the most established radiological instrument. However, computed tomography scanning and transabdominal intestinal ultrasound are promising alternatives that add additional information. Management of toxic megacolon is an interdisciplinary task that requires close interaction of gastroenterologists and surgeons from the very beginning. The optimal timing of surgery for toxic megacolon can be challenging. Here we review the latest data on the pathogenesis, clinical presentation, laboratory, and imaging modalities and provide algorithms for an evidence-based diagnostic and therapeutic approach.

Aetiology and surgical management of toxic megacolon

OBJECTIVE

The purpose of this article is to review the surgical management and outcome of toxic megacolon and to update the aetiology of toxic megacolon.

PATIENTS AND METHOD

A retrospective chart review of three academic colorectal surgery units was undertaken. Over a period of 20 years, 70 patients with surgically managed toxic megacolon were identified: 32 men and 38 women, median age 63 years (range, 23-87 years).

RESULTS

In 33 (48%) patients the main cause of toxic megacolon was inflammatory bowel disease. Thirty-seven (52%) patients had toxic megacolon of different aetiology. Sixty-three patients underwent colonic resection: 49 (70%) subtotal colectomies and 14 (20%) total colectomies, including 4 (6%) proctocolectomies. Seven (10%) patients had decompression (n=3) or faecal diversion (n=4) only. Forty-four of the resected patients underwent a Hartmann's procedure and an ileostomy; 13 (19%) patients had primary anastomoses, 11 (16%) ileorectal anastomoses (IRA) and 2 (3%) patients had ileal pouch-anal anastomosis (IPAA). Twenty-six (37%) patients subsequently had continuity restored. Total surgical complication rate was 19% (n=13), 8% (n=4) in patients treated with subtotal colectomy, 21% (n=3) in patients treated with total proctocolectomy and 86% (n=6) in patients treated with either decompression or diversion. The total mortality rate was 16% (n=11).

CONCLUSIONS

Toxic colitis complicated by toxic megacolon can occur after various diseases of the colon and remains a life-threatening disorder associated with a significant risk of postoperative complications. Subtotal colectomy with ileostomy remains the procedure of choice. Surgical colonic decompression with faecal diversion alone is associated with a high rate of complications.

Outcome following emergency surgery for refractory severe ulcerative colitis in a tertiary care centre in India

Background

Steroid-based intensive medical therapy for severe ulcerative colitis is successful in 60–70% of such patients. Patients with complications or those refractory to medical therapy require emergency colectomy for salvage. Little is known about the impact of timing of surgical intervention and surgical outcomes of such patients undergoing emergency surgery in India where the diagnosis is often delayed or missed in patients who are poor, malnourished and non-compliant to medical treatment.

Methods

The clinical records of all patients undergoing emergency surgery for severe ulcerative colitis or its complication in the Department of GI surgery AIIMS, New Delhi, India, between January 1985 and December 2003 were retrieved and data pertaining to demographic features, duration of intensive medical therapy, presence of complications, time from admission to emergency surgery, surgical procedure, in-hospital morbidity and mortality and follow up status extracted.

Results

A total of 72 patients underwent emergency surgery (Subtotal colectomy: 60; ileostomy alone under local anaesthesia: 12). Poor nutritional status was seen in 61% of the patients.

Twenty-one patients (29%) underwent emergency surgery for complications of severe ulcerative colitis such as colonic perforation (spontaneous 6, iatrogenic 4), massive lower gastrointestinal haemorrhage (5), toxic megacolon (4) and large bowel obstruction (2). The remaining patients (n = 51) underwent emergency surgery following failed intensive therapy; 17 underwent surgery ≤5 days (Group I) and 34 were operated >5 days (Group II) after initiation of intensive therapy. In this group all the post-operative deaths (n = 8) occurred in those who were operated after 5 days. The difference in mortality in these two groups (i.e. surgical intervention ≤ or >5 days) was statistically significant {0/17 (Group I) vs 8/34 (Group II); p = 0.03}.

Overall, 12 patients died (in-hospital mortality: 16.7%). The mortality was higher (10/43; 23.3%) in our early experience (i.e. 1985–1995) when compared to our subsequent experience (2/29; 6.9%) (1996–2003).

A total of 48 patients (including 3 awaiting a restorative procedure) are alive on follow up (66.7%; 3 patients lost to follow up). A restorative procedure could be successfully completed in 81% of the survivors of the emergency procedure.

Conclusion

To optimize the outcome, a combined team of physicians and surgeons should be involved in the management of patients with severe ulcerative colitis with focus on nutritional support, correction of metabolic derangements, close clinical monitoring and timely assessment for the need for emergency surgery. This retrospective analysis shows that improved results can be achieved with experience and by following a policy of early surgical intervention within 5 days, especially in patients who have failed intensive medical therapy.

A new look at toxic megacolon: an update and review of incidence, etiology, pathogenesis, and management

Toxic megacolon (TM) is an infrequent but devastating complication of colitis. Numerous forms of colonic inflammation can give rise to TM but the majority occur in individuals with inflammatory bowel disease (IBD). Recently there has been a marked increase in the number of reports of TM associated with pseudomembranous colitis. Because of the associated high morbidity and mortality, early recognition and management of TM is of paramount importance. The mechanisms involved in development of TM are not clearly delineated, but chemical mediators such as nitric oxide and interleukins may play a pivotal role in the pathogenesis. New evidence suggests that TM and its associated morbidity may be predicted by the extent of small bowel and gastric distension in patients with colitis. CT scanning may also play an important role the management of TM, in that it may be the only noninvasive mode to detect subclinical perforations and abscesses. Management involves close medical attention, supportive care, and treatment of the underlying colitis. Possible exacerbating factors such as narcotic and anticholinergic medications must be withdrawn, and colonic decompression via tube drainage or positional techniques must be considered. Signs of progression or complications of the disease must be treated aggressively with surgical intervention, as delay is associated with even greater risk of mortality.

Severe inflammatory bowel disease: medical management

The majority of patients with inflammatory bowel disease (IBD) have mild or moderate disease. However, a minority have a severe attack requiring hospital admission. Acute severe colitis (ulcerative colitis and Crohn's colitis) continues to be a medical emergency requiring careful joint management by physicians and surgeons. Extensive Crohn's jejuno-ileitis can also present major management problems, particularly in children. The evidence base for the management of this potentially severe form of Crohn's disease is limited and thus treatment has to be largely tailor-made for individual cases. Acute intestinal failure occurs in Crohn's disease in a variety of clinical settings, but the most challenging problem in the acute phase is the management of the major losses of fluid and electrolytes.

Surgery for inflammatory bowel diseases

Surgery is required in many patients with inflammatory bowel disease at some point in their disease. In patients with ulcerative colitis, surgery is potentially curative whereas recurrence of Crohn's disease following surgery is a common occurrence. As a result, the indications and surgical management of the two diseases may be quite different. Surgery is usually reserved for the management of complications or failure of medical treatment in Crohn's disease. Resection of the diseased segment is the usual procedure performed. While surgery usually results in an improvement in quality of life, recurrence of disease occurs frequently with reported rates of 5-90% at 1 year, depending on the criteria used. To date, there have been no surgical maneuvers which have been shown to decrease the risk of recurrence. Over the past few decades, several advances have been made in the surgical management of Crohn's disease: use of strictureplasty for extensive disease; use of laparoscopic techniques to perform surgery and the performance of the ileal pouch procedure in very selected patients. Significant advances in the surgical management of ulcerative colitis have been made in the past 50 years. Although there are several options available to patients, the preferred option now is the ileal pouch procedure. With technical modifications and with experience, this procedure can now be performed with a low complication rate, with good functional results and quality of life and excellent long-term outcome.

Fulminant Ulcerative Colitis

Fulminant ulcerative colitis necessitates immediate hospitalization. Supportive therapy such as aggressive rehydration, restriction of oral intake, and consideration of parenteral nutrition should be initiated. High-dose intravenous steroids should be started in almost all cases. Antibiotics and cyclosporine should be considered, especially in disease refractory to steroid therapy. Indications for surgery should always be kept in mind, and early involvement of the surgical team is always encouraged. Avoidance of life-threatening complications such as toxic megacolon, hemorrhage, and perforation is the goal of any treatment for fulminant ulcerative colitis.

Inflammatory bowel disease

The vast majority of patients with inflammatory bowel disease experience chronic symptoms punctuated by periodic exacerbations requiring adjustments in medical therapy or surgery. True emergencies are fortunately uncommon but have been associated with high rates of morbidity and mortality. Patients presenting with fulminant colitis, toxic megacolon, or perforation require prompt identification as well as intensive medical therapy and monitoring by physicians and surgeons experienced in the care of such patients. Recent advances in the evaluation and treatment of these complicated patients are reviewed.

Crohn's disease associated with renal amyloidosis successfully treated with an elemental diet

We report a case of Crohn's disease associated with nephrotic syndrome due to renal amyloidosis in a 21-year-old man in whom remission of both Crohn's disease and the nephrotic syndrome has been maintained with an elemental diet. The patient developed toxic megacolon and nephrotic syndrome due to renal amyloidosis. Intensive intravenous prednisolone therapy with total parenteral nutrition was dramatically effective in treating the toxic megacolon and inducing remission in Crohn's disease and afterward, remission of the nephrotic syndrome. Remission of both conditions has been maintained for more than 2 years with the elemental diet. To our knowledge, this is the first confirmed case of Crohn's disease complicated with renal amyloidosis in which only slight proteinuria (below 0.3 g/day) was shown with an elemental diet used for a long period.

The role of endoscopy in inflammatory bowel disease

Endoscopy has assumed a preeminent role in the diagnostic approach to IBD. It is more sensitive than radiography in detecting early, subtle changes of IBD, both through endoscopic appearance and histologic sampling of mucosa. Endoscopy also appears to be a safe technique in patients presenting with severe forms of colitis and can play an important role in defining the etiologic basis of disease in this subgroup of patients. In addition to its diagnostic role, endoscopy has proven useful in surveying disease activity, through the development of endoscopic disease activity indices. Endoscopy has also found a prominent role in the diagnostic and therapeutic approach to IBD complications. Endoscopic surveillance of chronic UC patients at risk for colon carcinoma has helped to define a therapeutic approach to this serious complication of UC. Endoscopic therapy has been applied to treat stricture formation associated with long-standing CD. Biliary endoscopy also represents the strategy of choice for diagnosing primary sclerosing cholangitis, an extraintestinal complication occurring in 5% of UC patients. Finally, endoscopy may help facilitate the discovery of disease pathogenesis in IBD, through the use of endoscopically recovered biopsy specimens in the research laboratory. Endoscopy allows for ready access to human tissue that has been the cornerstone of disease-related research over the past two decades.

The radiology of inflammatory bowel disease

This article presents various imaging modalities, including plain films, ultrasonography, magnetic resonance imaging, and radionuclide imaging, used for the diagnosis of inflammatory bowel disease (IBD), ulcerative colitis (UC), and Crohn's disease (CD). Also discussed are how to distinguish UC from CD and some of the intestinal complications of IBD.

Management of fulminant ulcerative colitis by primary restorative proctocolectomy

Severe acute ulcerative colitis unresponsive to medical management is characterized by multiple associated risk factors including anemia, hypoproteinemia, and high steroid requirements when urgent surgery is required. Current surgical options include use of primary ileal pouch-anal anastomosis (IPAA) vs. historic trends favoring colectomy with ileostomy.

PURPOSE

To evaluate the efficacy of primary IPAA in patients with severe colitis, we reviewed our own experience in 20 patients with this condition.

METHODS

Patients undergoing primary restorative proctocolectomy included 13 males and 7 females (mean age, 30.5 +/- 2.4 years). Exclusion criteria for primary reconstruction included septic patients and patients with associated medical conditions such as pulmonary or cardiovascular disease. History of ulcerative colitis averaged 3.1 +/- 1.1 years (range, 1 month to 19 years). Preoperative mean total serum protein concentration was 5.0 +/- 0.2 g/dl, and mean albumin concentration was 2.1 +/- 0.2 g/dl, reflecting disease severity. The average daily steroid requirement at the time of urgent colectomy was 58.0 +/- 4.4 mg of prednisone (or intravenous equivalent). Primary IPAA included 18 "W" reservoirs, 1 "S" reservoir, and 1 "J" reservoir.

RESULTS

Major surgical complications included mild pancreatitis (10 percent), anastomotic leak (5 percent), adrenal insufficiency (15 percent), an upper gastrointestinal bleed (5 percent), and small bowel obstruction (15 percent). There were no deaths, and no patients developed pelvic sepsis or required IPAA removal. At three and twelve months, 24-hr stool frequency averaged 7.3 +/- 0.4 and 4.9 +/- 0.3, respectively. Overall day and night continence was excellent and not different from patients who underwent elective IPAA procedures for ulcerative colitis.

CONCLUSIONS

Improved options such as primary IPAA may be safely used in selected patients requiring urgent surgery for severe or fulminant ulcerative colitis. Medical management should be abbreviated when disease control cannot be promptly achieved.

Current surgical therapy for mucosal ulcerative colitis

PURPOSE

There are numerous surgical options for the treatment of mucosal ulcerative colitis.

METHODS

This article reviews the currently available options for the treatment of mucosal ulcerative colitis. Separate discussions will explore both the options in the emergency and elective settings.

RESULTS

Patients with mucosal ulcerative colitis may undergo surgery either as an emergency or in the elective setting. Emergency surgery is usually performed for one of the life-threatening complications of ulcerative colitis: fulminant colitis, toxic megacolon, or massive hemorrhage. The most commonly performed procedure under these conditions is a subtotal colectomy with end ileostomy. The rectal stump may be handled in a variety of ways. This procedure avoids proctectomy or anastomosis. Thus, patients will still have all necessary anatomic structures to allow for any of the definitive elective procedures. Elective surgery is performed for intractable disease, complications of medical therapy, dysplasia, or, occasionally, extraintestinal manifestations. In the elective setting, a definitive operation can be done to remove most or all of the disease-bearing colorectum and leave the patient with a means to control fecal elimination. Total abdominal colectomy with ileorectal anastomosis leaves the patient with diseased bowel but obviates the need for pelvic dissection. Although total proctocolectomy removes all potentially diseased mucosa, these patients have a permanent ileostomy. The stoma can either be a standard Brooke's ileostomy or a continent Kock pouch. The most common definitive procedure currently performed is the near-total proctocolectomy with ileal pouch-anal anastomosis. This option can be completed either with a rectal mucosectomy and hand-sewn anastomosis or with a double-stapled anastomosis, preserving the anal transition zone. This procedure is successful in eradicating almost all diseased mucosa while allowing the patient per anal defecation. Bowel movement frequency, degree of anal continence, and return to social and professional commitments have met with a great deal of satisfaction in most patients. A newer alternative to this procedure employs laparoscopy to facilitate a smaller incision. A one-stage procedure which omits the protective ileostomy and thus saves the patient one operation has also been used with some success in selected cases.

CONCLUSION

There are several surgical options for the treatment of mucosal ulcerative colitis. Each one has a role and should be discussed with the patient.

Toxic megacolon: the knee-elbow position relieves bowel distension

Toxic megacolon complicating inflammatory or infective colitis carries a high morbidity and mortality and surgical intervention is necessary in up to 80% of cases. Perforation complicates toxic megacolon in about 35% of cases. After perforation, the death rate nears 50%. Gaseous distension of the bowel causes considerable discomfort to the patient and increases transmural pressure. The latter is thought to cause a reduction in blood flow and may predispose to perforation. The use of instruments for colonic aspiration is discouraged, because of the high risk of perforation. The successful use of the knee-elbow position to relieve bowel distension in two patients with toxic megacolon is described.

Toxic megacolon

Toxic megacolon, its incidence, differential diagnosis, and presenting signs and symptoms are reviewed in this article. The typical histologic and radiographic features are described with a review of the potential triggering factors. An outline of requirements for adequate monitoring of the patient with toxic megacolon is provided. The general management and specific medical management are discussed in detail, and the medical outcome with both medical and surgical intervention is reviewed.

Toxic megacolon. An analysis of 70 cases

The clinical features and outcome of 70 patients treated for toxic megacolon between 1970 and 1984 in five university-affiliated hospitals were determined. There were 35 women and 35 men with a mean age of 39 +/- 0.2 years. Toxic megacolon occurred at the initial episode of colitis in 43 patients (61 percent). Only five patients had a specific colitis: salmonellosis, two; ischemic, two; and pseudomembranous, one. Of the 65 remaining patients with nonspecific colitis, six had to be operated on without delay because of peritonitis. In the remaining 59 patients, toxic megacolon was cured with intensive medical management in nine (15 percent), improved temporarily in 14 (24 percent), and remained unchanged in 36 (61 percent). The postoperative mortality rate was 11 percent for all patients (6/56), 4 percent for patients without perforation (2/50) compared with 27 percent for patients with perforation (4/15). None of the patients who underwent surgery within five days of medical treatment died. When toxic megacolon was complicated by hemorrhage (nine patients) or peritonitis (eight patients), the mortality rate increased to 33 percent and 27 percent, respectively. A one-stage proctocolectomy was performed in 19 patients (32 percent). Of 32 patients in whom the rectum was retained, successful restoration of continuity was possible in only seven (22 percent) within 12 months after surgery. In well-selected patients, a plea is made for rectal preservation to offer an alternative to permanent ileostomy.

Crohn's disease: the role of surgical treatment

The surgical treatment of Crohn's disease is necessitated by complications of the disease or by failure of medical therapy. Despite the fact that the patients with Crohn's disease who undergo operation have the most severe spectrum of problems, about half these patients may never need a further procedure, and the mortality from the disease itself is low. During the past 50 years, the concepts of surgical treatment for Crohn's disease have gradually evolved, and the current feeling among surgeons can be summarized best in the word "moderation." In this article, general guidelines for treatment and the results of various procedures for Crohn's disease are presented, including discussion of the complications of chronic obstruction, fistulization and abscess, bleeding, intractability, and toxic megacolon.