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            text: 'Sigmoid Volvulus in a 45-Year-Old Male: A Case Report from Rural Zambia Highlighting Dietary Triggers, Early Radiological Diagnosis, and Surgical Management',
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      // ===== ABSTRACT =====
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      // ===== 1. INTRODUCTION =====
      h1('1. Introduction'),
      body('Sigmoid volvulus occurs when the sigmoid colon twists on its mesenteric axis, resulting in a closed-loop obstruction. It accounts for 50-90% of all colonic volvulus cases and is a dominant cause of large bowel obstruction in Africa, the Middle East, India, and parts of South America - the so-called "volvulus belt." In contrast, it is comparatively rare in Western Europe and North America, where colorectal carcinoma is the leading cause of large bowel obstruction.'),
      body('In sub-Saharan Africa and Zambia specifically, sigmoid volvulus disproportionately affects younger patients in their fourth and fifth decades of life, an epidemiological pattern that differs from the predominantly elderly presentation observed in Western populations. This difference is attributed to dietary factors - particularly high-residue, high-fibre diets - which increase colonic load and promote elongation of the sigmoid colon over time, creating the redundant loop that predisposes to axial rotation.'),
      body('The condition carries significant morbidity and mortality, with rates approaching 10% even in well-equipped centres, and rising sharply when diagnosis is delayed or bowel ischaemia or perforation supervenes. Early clinical recognition, prompt plain abdominal radiography, and timely intervention - either endoscopic decompression or surgical laparotomy - are the cornerstones of management.'),
      body('This case report documents the clinical course of a 45-year-old male from Chipata, Zambia, presenting with sigmoid volvulus and highlights a potentially novel dietary trigger, the acute-onset precipitant of exclusive mango consumption, and the surgical management pathway employed at a regional referral centre.'),

      // ===== 2. PATIENT INFORMATION =====
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      // ===== 3. CLINICAL PRESENTATION =====
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      h2('3.1 Chief Complaint'),
      body('The patient presented to the emergency surgical unit at Levy Mwanawasa Teaching Hospital with a one-to-two day history of severe, progressively worsening crampy lower abdominal pain, associated with gross abdominal distension, non-bilious vomiting, and absolute constipation (obstipation - inability to pass stool or flatus).'),

      h2('3.2 History of Presenting Illness'),
      body('The patient reported consuming mangoes exclusively in the days preceding the onset of symptoms, without supplementary food intake. He had no prior episodes of bowel obstruction, no previous abdominal surgery, and no known history of constipation or bowel dysmotility. There was no history of laxative use, psychiatric medication use, or institutionalisation. Symptoms were progressive, with no spontaneous resolution.'),

      h2('3.3 Physical Examination'),

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      body('The absence of peritonism, fever, and haemodynamic instability at presentation suggested viable bowel without ischaemia or perforation, placing the patient in a lower-risk category on initial assessment.'),

      // ===== 4. DIAGNOSTIC WORKUP =====
      h1('4. Diagnostic Workup'),
      h2('4.1 Laboratory Investigations'),
      body('Formal laboratory values were not documented in the available records. In the context of sigmoid volvulus, routine investigations typically include a full blood count, serum electrolytes, urea and creatinine (to assess dehydration and renal function), and lactate levels when bowel ischaemia is suspected. Leukocytosis may suggest gangrenous bowel; however, its absence does not exclude ischaemia.'),

      h2('4.2 Radiological Investigations'),
      body('A plain supine abdominal X-ray was obtained and was diagnostic. Findings included:'),
      bullet('A markedly dilated loop of sigmoid colon, occupying the central and upper abdomen'),
      bullet('The classic "coffee bean" sign (also described as the "bent inner tube" or "omega loop" sign): a large, inverted U-shaped loop with a dense white line (the walls of the apposed limbs) running from the left iliac fossa toward the right upper quadrant'),
      bullet('Absent rectal gas'),
      bullet('Multiple air-fluid levels consistent with large bowel obstruction'),
      body('The coffee bean sign has a reported sensitivity of 60-75% on plain films for sigmoid volvulus. CT imaging, while not performed in this case (likely owing to resource limitations), carries near 100% sensitivity and provides additional information including the "whirl sign" (twisting of the mesentery and mesenteric vessels) and confirmation of bowel viability.'),
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      caption('Figure 1. Plain abdominal X-ray demonstrating the pathognomonic "coffee bean" sign of sigmoid volvulus. Note the massively dilated sigmoid loop with absent rectal gas, consistent with a closed-loop large bowel obstruction. (Courtesy: Levy Mwanawasa Teaching Hospital)'),

      // ===== 5. DIFFERENTIAL DIAGNOSIS =====
      h1('5. Differential Diagnosis'),
      body('The following diagnoses were considered in the differential:'),

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      // ===== 6. THERAPEUTIC INTERVENTION =====
      h1('6. Therapeutic Intervention'),
      h2('6.1 Initial Resuscitation'),
      body('On admission, standard resuscitative measures were initiated: intravenous access was established, fluid resuscitation commenced, nil by mouth enforced, and a nasogastric tube inserted for gastric decompression. An indwelling urethral catheter was placed to monitor urine output.'),

      h2('6.2 Non-operative Attempt: Rectal Decompression'),
      body('An initial attempt at rigid proctoscopic decompression was undertaken. This technique aims to pass a rigid proctoscope or flatus tube through the torsed segment to decompress the obstructed sigmoid colon. Endoscopic detorsion is successful in 55-94% of cases when performed for viable bowel, and is the preferred first-line approach in haemodynamically stable patients without peritonism.'),
      body('In this case, rectal decompression was unsuccessful. Failure of endoscopic detorsion is an indication for operative intervention, particularly when bowel viability cannot be excluded.'),

      h2('6.3 Operative Intervention: Exploratory Laparotomy'),
      body('The patient was taken to theatre for exploratory laparotomy under general anaesthesia. Intraoperative findings confirmed a sigmoid volvulus with an anticlockwise torsion, consistent with the pattern described in African populations. The sigmoid colon was found to be viable with no evidence of ischaemia, gangrene, or perforation.'),
      body('The following surgical steps were performed:'),
      bullet('Detorsion: the sigmoid colon was manually untwisted to restore normal anatomical alignment'),
      bullet('Sigmoidopexy: the sigmoid colon was fixed to the posterior abdominal wall (lateral peritoneum) to reduce the risk of recurrence'),
      body('The abdomen was closed in layers without incident. A decision was made to perform sigmoidopexy rather than sigmoid resection, given: (1) the bowel was viable; (2) the patient was haemodynamically stable; (3) the surgical setting and resources were considered. It is important to note that sigmoidopexy carries a substantially higher recurrence rate (up to 85-90%) compared to sigmoid resection with primary anastomosis, which remains the gold standard definitive treatment.'),
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      caption('Figures 2-4. Intraoperative photographs. (Left) The massively dilated sigmoid colon following laparotomy, demonstrating a viable loop without ischaemia. (Centre and Right) The operative field following detorsion and sigmoidopexy, with the colon restored to normal position. (Courtesy: Levy Mwanawasa Teaching Hospital - used with patient consent for educational purposes)'),

      h2('6.4 Postoperative Course'),
      body('The patient was managed in the surgical ward postoperatively. Analgesia, intravenous fluids, and antibiotics were administered per standard protocol. Nasogastric drainage was continued until bowel function returned. The patient was counselled on dietary modification (balanced diet, avoidance of excessive bulky food intake at one sitting) and the risk of recurrence.'),
      body('The patient was discharged in satisfactory condition. Elective outpatient review was arranged to discuss definitive sigmoid resection as an option to prevent recurrence, given the known high recurrence rate following sigmoidopexy alone.'),

      // ===== 7. FOLLOW-UP =====
      h1('7. Follow-Up and Outcome'),
      body('Formal post-discharge follow-up data are not documented in the available records. The patient was advised to return for elective review and to seek early medical attention if symptoms recurred. Current evidence strongly recommends elective sigmoid resection with primary anastomosis following successful treatment of the index episode, given recurrence rates of up to 90% and mortality approaching one in three with recurrent volvulus.'),
      body('Long-term dietary advice included:'),
      bullet('Consumption of a balanced, varied diet'),
      bullet('Avoidance of large single-food meals, particularly those high in bulk or fermentable content'),
      bullet('Maintaining adequate hydration'),
      bullet('Seeking prompt medical attention for any recurrence of abdominal pain, distension, or obstipation'),

      // ===== 8. DISCUSSION =====
      h1('8. Discussion'),
      h2('8.1 Epidemiology and Aetiology in the African Context'),
      body('Sigmoid volvulus is the most common cause of large bowel obstruction in indigenous Black African populations, accounting for up to 50-90% of all colonic volvulus cases globally. The geographic distribution follows the "volvulus belt," spanning sub-Saharan Africa, the Middle East, Brazil, and parts of South Asia. This distribution is attributed to dietary factors: high-residue, high-fibre diets (staples such as maize, cassava, and seasonal fruits) consumed from childhood promote colonic elongation and the development of a redundant sigmoid loop with a narrow mesenteric base - the anatomical prerequisite for volvulus.'),
      body('In the present case, a putative dietary trigger of exclusive mango consumption is proposed. Mangoes are seasonal, high-fibre fruits widely consumed in Eastern Zambia. The ingestion of large quantities of high-fibre food on an empty stomach could plausibly increase colonic load acutely, raising intraluminal pressure and promoting rotation of a pre-existing redundant loop. While anecdotal, this observation is consistent with published reports of food-related precipitants of sigmoid volvulus in Africa and warrants documentation in the regional surgical literature.'),

      h2('8.2 Clinical Features and Diagnosis'),
      body('The classic triad of sigmoid volvulus - crampy abdominal pain, gross abdominal distension, and obstipation - was present in this case. As noted in Rosen\'s Emergency Medicine, "the extent to which the sigmoid colon can twist on itself varies, so the presentation can vary from subtle to dramatic." The clinical picture in this patient was acute and unmistakeable.'),
      body('Plain abdominal X-ray remains the primary diagnostic tool in resource-limited settings, and was diagnostic here. The "coffee bean" sign (also called the "bent inner tube" or "omega loop" sign) was present and provided sufficient confidence for surgical planning. CT imaging, while not available in this case, provides near 100% diagnostic sensitivity and is the investigation of choice when available, demonstrating the "whirl sign" and "bird\'s beak" appearance on water-soluble contrast enema.'),

      h2('8.3 Management Pathway and Decision-Making'),
      body('The 2023 World Society of Emergency Surgery (WSES) consensus guidelines recommend that stable patients without peritonism undergo endoscopic decompression as first-line management. Success rates range from 55-94%. When endoscopic detorsion fails, or when peritonism, haemodynamic instability, or gangrenous bowel is present, operative intervention is mandatory.'),
      body('In this case, unsuccessful rectal decompression appropriately triggered laparotomy. The choice of sigmoidopexy rather than resection at index surgery is debated. Current Surgical Therapy (14th edition) and Bailey & Love\'s Short Practice of Surgery (28th edition) both note that sigmoid resection with primary anastomosis is the gold standard for prevention of recurrence, with sigmoidopexy carrying recurrence rates of 85-90%. However, sigmoidopexy may be a pragmatic option in resource-limited settings, in inexperienced hands, or as a bridge to elective definitive surgery - as appears to have been the case here.'),

      h2('8.4 The Role of Resource-Limited Settings'),
      body('This case highlights several challenges inherent to surgical practice in rural sub-Saharan Africa: limited access to CT imaging for confirmatory diagnosis, unavailability of flexible endoscopy for decompression (necessitating rigid proctoscopy), and the need to balance ideal definitive management against available resources, operative risk, and patient preferences. Despite these constraints, the surgical team achieved a successful outcome through sound clinical judgement and appropriate operative skill.'),

      h2('8.5 Prevention and Public Health Implications'),
      body('Sigmoid volvulus is a potentially preventable condition. In endemic regions, public health messaging around balanced dietary habits and early health-seeking behaviour for symptoms of bowel obstruction could reduce morbidity. Healthcare providers in primary care settings must maintain a high index of suspicion for sigmoid volvulus in any patient presenting with the triad of abdominal pain, distension, and obstipation, and should arrange urgent plain radiography and surgical review.'),

      // ===== 9. LEARNING POINTS =====
      h1('9. Key Learning Points'),
      bullet('Sigmoid volvulus is the most common cause of large bowel obstruction in sub-Saharan Africa and should be the top differential in any African patient presenting with the classic triad of pain, distension, and obstipation.'),
      bullet('The "coffee bean" sign on plain abdominal X-ray is pathognomonic and sufficient to initiate management in the absence of CT imaging.'),
      bullet('Haemodynamically stable patients without peritonism should undergo endoscopic decompression as first-line management; failure mandates laparotomy.'),
      bullet('Sigmoidopexy reduces recurrence less effectively than sigmoid resection with primary anastomosis; elective resection should be planned after index treatment.'),
      bullet('Dietary triggers including high-bulk food intake may precipitate volvulus in anatomically predisposed individuals; dietary counselling is an important part of discharge management.'),
      bullet('Case documentation from regional African centres contributes to the sparse literature on this condition and informs guideline development for resource-limited settings.'),

      // ===== 10. ETHICS =====
      h1('10. Ethical Considerations'),
      body('Written informed consent was obtained from the patient for publication of this case report and associated clinical photographs. The patient\'s full name and personally identifying information have been anonymised in this publication (referred to as "J.B."). This case is shared exclusively for academic and educational purposes in accordance with institutional ethical guidelines. No ethical committee approval was required under institutional policy for de-identified case reports.'),

      // ===== 11. AUTHOR CONTRIBUTIONS =====
      h1('11. Author Contributions'),
      body('Constance Mtonga: case identification, clinical data collection, literature review, manuscript preparation, and submission.'),

      // ===== 12. REFERENCES =====
      h1('12. References'),
      new Paragraph({ children: [new TextRun({ text: '1.', bold: true, size: 22 }), new TextRun({ text: '  Tian BWCA, Vigutto G, Tan E, van Goor H, Bendinelli C, Abu-Zidan F. WSES consensus guidelines on sigmoid volvulus management. ', size: 22 }), new TextRun({ text: 'World J Emerg Surg.', size: 22, italics: true }), new TextRun({ text: ' 2023;18(1):34. doi:10.1186/s13017-023-00502-x. [PMID: 37189134]', size: 22 })], spacing: { after: 80 } }),
      new Paragraph({ children: [new TextRun({ text: '2.', bold: true, size: 22 }), new TextRun({ text: '  Savitch SL, Harbaugh CM. Colonic Volvulus. ', size: 22 }), new TextRun({ text: 'Clin Colon Rectal Surg.', size: 22, italics: true }), new TextRun({ text: ' 2024;37(6):381-390. doi:10.1055/s-0043-1773783. [PMID: 39399132]', size: 22 })], spacing: { after: 80 } }),
      new Paragraph({ children: [new TextRun({ text: '3.', bold: true, size: 22 }), new TextRun({ text: '  Sabatini F, Properzi L, Marinozzi G, et al. Safety and Efficacy of Endoscopic Derotation in Colonic Volvulus Occlusion: Systematic Review and Meta-Analysis. ', size: 22 }), new TextRun({ text: 'J Clin Med.', size: 22, italics: true }), new TextRun({ text: ' 2026;15(3):960. [PMID: 41682876]', size: 22 })], spacing: { after: 80 } }),
      new Paragraph({ children: [new TextRun({ text: '4.', bold: true, size: 22 }), new TextRun({ text: '  Walls RM, Hockberger RS, Gausche-Hill M, eds. ', size: 22 }), new TextRun({ text: 'Rosen\'s Emergency Medicine: Concepts and Clinical Practice.', size: 22, italics: true }), new TextRun({ text: ' 10th ed. Elsevier; 2022. Chapter 81: Volvulus.', size: 22 })], spacing: { after: 80 } }),
      new Paragraph({ children: [new TextRun({ text: '5.', bold: true, size: 22 }), new TextRun({ text: '  Cameron JL, Cameron AM, eds. ', size: 22 }), new TextRun({ text: 'Current Surgical Therapy.', size: 22, italics: true }), new TextRun({ text: ' 14th ed. Elsevier; 2023. Sigmoid Volvulus section, p. 271-275.', size: 22 })], spacing: { after: 80 } }),
      new Paragraph({ children: [new TextRun({ text: '6.', bold: true, size: 22 }), new TextRun({ text: '  Williams NS, O\'Connell PR, McCaskie AW, eds. ', size: 22 }), new TextRun({ text: 'Bailey & Love\'s Short Practice of Surgery.', size: 22, italics: true }), new TextRun({ text: ' 28th ed. CRC Press; 2023. Chapter 78: Intestinal Obstruction.', size: 22 })], spacing: { after: 80 } }),
      new Paragraph({ children: [new TextRun({ text: '7.', bold: true, size: 22 }), new TextRun({ text: '  Gagnier JJ, Kienle G, Altman DG, et al. The CARE guidelines: consensus-based clinical case reporting guideline development. ', size: 22 }), new TextRun({ text: 'J Clin Epidemiol.', size: 22, italics: true }), new TextRun({ text: ' 2014;67(1):46-51.', size: 22 })], spacing: { after: 80 } }),
      new Paragraph({ children: [new TextRun({ text: '8.', bold: true, size: 22 }), new TextRun({ text: '  Medical Journal of Zambia. Author guidelines for case reports. Available at: www.mjz.co.zm. Accessed May 2026.', size: 22 })], spacing: { after: 80 } }),
      new Paragraph({ children: [new TextRun({ text: '9.', bold: true, size: 22 }), new TextRun({ text: '  BMJ Case Reports. Editorial policies. 2024. Available at: https://casereports.bmj.com. Accessed May 2026.', size: 22 })], spacing: { after: 80 } }),

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