Caeco-colic Intussusception Simulating an Appendicular Mass

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Caeco-colic Intussusception Simulating an Appendicular Mass

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Article ID: ISSN 2046-1690 Caeco-colic Intussusception Simulating an Appendicular Mass Corresponding Author: Dr. Matthew O Adelekan, Surgeon, North manchester General Hospital - United Kingdom Submitting Author: Dr. Matthew O Adelekan, Surgeon, North manchester General Hospital - United Kingdom Article ID: Article Type: Case Report Submitted on:30-mar-2012, 12:52:23 PM GMT Article URL: http://www.webmedcentral.com/article_view/3206 Subject Categories:SURGERY Keywords:Caeco-colic, Intussusception, Appendicular mass Published on: 31-Mar-2012, 08:26:50 AM GMT How to cite the article:adelekan MO. Caeco-colic Intussusception Simulating an Appendicular Mass. WebmedCentral SURGERY 2012;3(3): Copyright: This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Source(s) of Funding: None Competing Interests: None Webmedcentral > Case Report Page 1 of 10

Caeco-colic Intussusception Simulating an Appendicular Mass Author(s): Adelekan MO Background Acute appendicitis is a common diagnosis encountered in emergency surgical admissions with a need for an immediate appendicectomy. In about 2-6% of cases, an appendicular mass has already developed at presentation. (1) There is the trend to treat appendicular mass by conservative management, which may be adequate in children but in the adults the clinical diagnosis should be radiologically confirmed as other sinister pathological processes such as intussusception or tumour may simulate an appendicular mass. Here we present a case of caeco-colic intussusception presenting acutely similar to an appendicular mass. Case presentation A 61 years old retired nurse presented to the casualty with ten day history of colicky central abdominal and right iliac fossa pain. It was more at the right iliac fossa and has gradually worsened. There was an associated anorexia, gradual abdominal distension, nausea but no vomiting. She had a normal bowel movement the day before presentation. She was asthmatic, hypothyroid, and has had a total abdominal hysterectomy for a benign condition several years back, was on salbutamol and Beclazone inhaler and thyroxin tablets. On examination, she was afebrile but tachycardic with a pulse of 98/minute, blood pressure of 155/86mmHg and respiratory rate of 16.The abdomen was slightly distended, diffusely tender but more at the right iliac fossa (RIF), with guarding and a palpable tender mass. There were hypoactive bowel sounds and rectal examination revealed a loaded rectum with normal stool. The haemoglobin (Hb) was 14.5g/dl, white cell count (WBC) 11.8 X10 9 /L, neutrophils 8.7 X10 9 /L, CRP 76, amylase 28 iu/l, and normal liver function tests. The abdominal and chest x-rays were normal. A provisional diagnosis of appendicular mass was made. She was managed conservatively with intra venous fluid, analgesics and broad-spectrum antibiotics. Abdominal computerized tomography (CT) scan showed a marked circumferential thickening of the Caecum wall, extending into the ascending colon, with an associated well circumscribed 4 x 5.4cm fat containing intramural lipoma, with intussusception of the caecum. (Fig.1 a&b). The liver, spleen, gallbladder, and pancreas were normal. She underwent a laparotomy, which revealed some turgid peritoneal fluid, minimal ileal dilatation and an intussusception of the caecum into the ascending colon. A limited right hemicolectomy was done with primary ileo-colic anastomosis. The post operative recovery was uneventful and she was discharged home after 5 days. The histology confirmed an intussuscepting caecal polypoidal tumour of adipose tissue, covered with partly ulcerated mucosa and atrophic appendix. (Fig 2) Discussion Appendicular mass is caused by the swelling and inflammation of the appendix, caecum, omentum and the distal part of the terminal ileum. It accounts for about 2-6% of patients presenting with appendicitis. (1) It forms a spectrum of diseases ranging from an inflamed appendix, walled off by the omentum (an appendiceal phlegmon), to a large collection of pus surrounded by adherent and inflamed omentum (an appendiceal abscess). (2) There are three approaches to the treatment; one is the conservative management, with intravenous fluid, analgesics and antibiotics. Secondly is the immediate operative approach where appendicectomy is performed before the mass resolves and thirdly is the more classic approach of initial conservative management of the mass followed by interval appendicectomy after the resolution in about 6-8 weeks. (1,2) Malignant or benign lesions in the terminal ileum and caecum, such as adenoma, lymphoid hyperplasia or lipoma causing intussusception, can mimic appendicular mass, such as illustrated by our case, hence the need to adequately confirm the diagnosis by radiological investigations such as abdominal CT scan at the same admission, as this may necessitate an immediate operative intervention. Lipoma is the commonest mesenchymal benign tumour of the colon, Webmedcentral > Case Report Page 2 of 10

although rare, accounts for 21% of colonic intussusception. They are usually small and frequently seen in the right colon, especially at the caecum in elderly women (3). The majority of intussusception in children, 85-90%, is of idiopathic cause but in adults, an identifiable lead lesion is seen in 72-92 % of cases, about 50% of which may be malignant. (4). Intussusception is not a common encounter in the adults, representing 5% of all intussusceptions and 1% of all bowel obstructions (3). Patients tend to present with vague abdominal pains and features of partial bowel obstruction which may be acute, intermittent or chronic, with about 11% presenting with an abdominal mass (5). CT scan is the most reliable pre-operative investigation as it demonstrates the lesion with accuracy in 75-78% of cases. It is described as a target mass on CT with the intussusceptum forming the centre and the oedematous intussuscipien forming the external ring (3). It is made up of invagination of bowel segment, the intussusceptum (the inner part) into the adjacent bowel the intussuscipiens (the outer part). Delays in the treatment can lead into full blown bowel obstruction and strangulation, which usually affect the intussusceptum but may occasionally affect the intussuscipiens as well. The signs of peritoneal irritations are usually absent initially as the gangrenous intussusceptum is covered by the initially (4, 6.) normal intussuscipiens. 1. Nitecki S, Assalia A, Scheim M. Contemporary management of the appendicular mass. Br J Surg 1993;80:18-20 2. Deakin DE, Ahmed I. Interval appendicectomy after resolution of adult inflammatory appendix mass- is it necessary? The Surgeon: clinical review Feb2007; Vol5 No1 3. Azar T, Berger DL. Adult intussusception. Annals of surgery 1997 Aug; 226 (2):134-138 4. Tan KY, Tan SM, Tan AG, Chen CY, Chng HC, Hor MN. Adult intussusception. ANZ J Surg. 2003 Dec; 73 (12): 1044-7 5. Marinella MA, Conley CD. Intussusception in an adult. West J med 1996 Nov;165 (5):311-312 6. Lebeau R, Koffi E, Diane B, Amani A, Kovassi JC, Acute intestinal intussusceptions in adults: analysis of 20 cases. Ann Chir 2006 Oct; 131 (8) 44-50. Treatment of colonic intussusception in the adults is en bloc resection, without manipulation, as advocated by many series as this prevents perforation of the gut and minimises spillage of gut content or dissemination of malignant cells when the intussusceptum is malignant. (6) Conclusion In making a diagnosis of appendicular mass, adequate investigations such as the abdominal CT scan should be done to rule out other possible casuses of RIF mass especially if conservative management is instituted. Malignant or benign lesions in the terminal ileum and the caecum such as adenoma, lymphoid hyperplasia or lipoma causing intussusception, can mimic appendicular mass, such as illustrated by our case, hence the need to adequately confirm the diagnosis by radiological investigations such as abdominal CT scan at the same admission, as this may necessitate an immediate operative intervention. References Webmedcentral > Case Report Page 3 of 10

Illustrations Illustration 1 Fig 1a Abdominal CT scan with oral contrast showing well circumscribed fat containing intramural lipoma with intussusception of the caecum. Webmedcentral > Case Report Page 4 of 10

Illustration 2 Fig 1b. Abdominal CT scan with oral contrast showing well circumscribed 4 x 5.4cm fat containing intramural lipoma with intussusception of the caecum. Webmedcentral > Case Report Page 5 of 10

Illustration 3 Fig 2. Specimen of intussuscepting caecal polypoidal tumour of adipose tissue, (arrowed) covered with partly ulcerated mucosa and the atrophic appendix. Webmedcentral > Case Report Page 6 of 10

Reviews Review 1 Review Title: Informative and well written case report Posted by Mr. Deep Malde on 23 Apr 2012 01:02:50 PM GMT 1 Is the subject of the article within the scope of the subject category? Yes 2 Are the interpretations / conclusions sound and justified by the data? Yes 3 Is this a new and original contribution? No 4 Does this paper exemplify an awareness of other research on the topic? No 5 Are structure and length satisfactory? Yes 6 Can you suggest brief additions or amendments or an introductory statement that will increase the value of this paper for an international audience? 7 Can you suggest any reductions in the paper, or deletions of parts? No 8 Is the quality of the diction satisfactory? Yes 9 Are the illustrations and tables necessary and acceptable? Yes 10 Are the references adequate and are they all necessary? Yes 11 Are the keywords and abstract or summary informative? Yes Rating: 7 Comment: Well written, to the point and informative case report of a commonly encountered pathology with specific relevance to adults. Agree with the neccessity to carry out CT scans on all right iliac fossae masses in adults to avoid missing underlying malignant pathology. Competing interests: None Invited by the author to make a review on this article? : Yes Experience and credentials in the specific area of science: I have 10 years expererience in general and emergency surgery, dealing with abdominal masses and managing the various presentations of appendicular pathology. Publications in the same or a related area of science: Yes How to cite: Malde D.Informative and well written case report[review of the article 'Caeco-colic Intussusception Simulating an Appendicular Mass ' by ].WebmedCentral 1970;3(4):WMCRW001717 No Webmedcentral > Case Report Page 7 of 10

Review 2 Review Title: Very interesting and well written case Posted by Dr. Pietro G Calo on 04 Apr 2012 02:39:52 PM GMT 1 Is the subject of the article within the scope of the subject category? Yes 2 Are the interpretations / conclusions sound and justified by the data? Yes 3 Is this a new and original contribution? No 4 Does this paper exemplify an awareness of other research on the topic? No 5 Are structure and length satisfactory? Yes 6 Can you suggest brief additions or amendments or an introductory statement that will increase the value of this paper for an international audience? 7 Can you suggest any reductions in the paper, or deletions of parts? No 8 Is the quality of the diction satisfactory? Yes 9 Are the illustrations and tables necessary and acceptable? Yes 10 Are the references adequate and are they all necessary? Yes 11 Are the keywords and abstract or summary informative? Yes Rating: 6 Comment: A very interesting case, very well written but no so original Competing interests: No Invited by the author to make a review on this article? : No Experience and credentials in the specific area of science: Good Publications in the same or a related area of science: No How to cite: Calo P.Very interesting and well written case[review of the article 'Caeco-colic Intussusception Simulating an Appendicular Mass ' by ].WebmedCentral 1970;3(4):WMCRW001643 No Webmedcentral > Case Report Page 8 of 10

Review 3 Review Title: A well written article with good figures Posted by Dr. Feng Yih Chai on 01 Apr 2012 01:38:40 PM GMT 1 Is the subject of the article within the scope of the subject category? Yes 2 Are the interpretations / conclusions sound and justified by the data? Yes 3 Is this a new and original contribution? No 4 Does this paper exemplify an awareness of other research on the topic? Yes 5 Are structure and length satisfactory? Yes 6 Can you suggest brief additions or amendments or an introductory statement that will increase the value of this paper for an international audience? 7 Can you suggest any reductions in the paper, or deletions of parts? No 8 Is the quality of the diction satisfactory? Yes 9 Are the illustrations and tables necessary and acceptable? Yes 10 Are the references adequate and are they all necessary? No 11 Are the keywords and abstract or summary informative? Yes Rating: 6 Comment: A more systematic and consistent referencing style is preferred. The underlined segment of the references are in different format. I think it can be improved. No 1. Nitecki S, Assalia A, Scheim M. Contemporary management of the appendicular mass. Br J Surg 1993;80:18-20 2. Deakin DE, Ahmed I. Interval appendicectomy after resolution of adult inflammatory appendix mass- is it necessary? The Surgeon: clinical review Feb2007; Vol5 No1 3. Azar T, Berger DL. Adult intussusception. Annals of surgery 1997 Aug; 226 (2):134-138 4.Tan KY, Tan SM, Tan AG, Chen CY, Chng HC, Hor MN. Adult intussusception. ANZ J Surg. 2003 Dec; 73 (12): 1044-7 Competing interests: No Invited by the author to make a review on this article? : No Experience and credentials in the specific area of science: Managed similiar cases before. Publications in the same or a related area of science: No How to cite: Chai F.A well written article with good figures[review of the article 'Caeco-colic Intussusception Simulating an Appendicular Mass ' by ].WebmedCentral 1970;3(4):WMCRW001639 Webmedcentral > Case Report Page 9 of 10

Disclaimer This article has been downloaded from WebmedCentral. With our unique author driven post publication peer review, contents posted on this web portal do not undergo any prepublication peer or editorial review. It is completely the responsibility of the authors to ensure not only scientific and ethical standards of the manuscript but also its grammatical accuracy. Authors must ensure that they obtain all the necessary permissions before submitting any information that requires obtaining a consent or approval from a third party. Authors should also ensure not to submit any information which they do not have the copyright of or of which they have transferred the copyrights to a third party. Contents on WebmedCentral are purely for biomedical researchers and scientists. They are not meant to cater to the needs of an individual patient. The web portal or any content(s) therein is neither designed to support, nor replace, the relationship that exists between a patient/site visitor and his/her physician. Your use of the WebmedCentral site and its contents is entirely at your own risk. We do not take any responsibility for any harm that you may suffer or inflict on a third person by following the contents of this website. Webmedcentral > Case Report Page 10 of 10