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Surgical Case Reports

, 5:183 | Cite as

Paracecal hernia due to membranous adhesion of the omentum to the right paracolic gutter

  • Taro Yokota
  • Kazuhiro OtaniEmail author
  • Junichi Yoshida
  • Naoki Mochidome
  • Eiji Miyatake
  • Chihiro Nakahara
  • Toshiyuki Ishimitsu
  • Masao Tanaka
Open Access
Case Report
  • 135 Downloads

Abstract

Background

Paracecal hernias, also known as pericecal hernias, are an exceptionally rare type of internal hernia. We report a unique case of paracecal hernia due to membranous adhesion of the omentum to the right paracolic gutter.

Case presentation

An 86-year-old female was admitted to our hospital with vomiting and abdominal pain. Laboratory findings showed a slightly elevated C-reactive protein level. Computed tomography scan showed dilated loops of the small intestine in the right paracolic gutter with medial displacement of the cecum and ascending colon. Internal hernia around the cecum due to postoperative adhesion after appendectomy was suspected, and she underwent emergency laparotomy. Intraoperative findings revealed the adhesion between the omentum and right paracolic gutter forming a cavity with the small intestine incarcerated. No abnormal adhesion in the ileocecal region was seen. We transected the omental adhesion from the orifice to the far end of the cavity near the hepatic flexure of the colon to release strangulation and to prevent recurrence. The patient was discharged on postoperative day 14 without complications.

Conclusions

Paracecal hernias have a type of membranous adhesion of the omentum to the right paracolic gutter. Surgeons should be aware of this paracecal hernia type, when they encounter the internal hernia.

Keywords

Paracecal hernia Internal hernia Paracolic gutter Bowel obstruction Membranous adhesion of the omentum 

Abbreviation

CT

Computed tomography

Background

Internal hernias are an infrequent cause of small bowel obstruction [1]. Paracecal hernias, also known as pericecal hernias, are an exceptionally rare type of internal hernia [2]. In a paracecal hernia, herniation generally occurs through an orifice that develops from the peritoneal recess formed by folds of the peritoneum in the paracecal area [3]. We herein report a unique case of paracecal hernia which occurred due to membranous adhesion of the omentum to the right paracolic gutter, along with pertinent literature review.

Case presentation

An 86-year-old female was admitted to our hospital, presenting with vomiting and abdominal pain that had lasted for 2 days. Her past history included McBurney’s appendectomy in her 30s, systemic lupus erythematosus diagnosed in her 50s, and senile dementia for the last 3 years. She had been treated with steroids for a year in her mid-50s but has not received steroids for the last 30 years. She had mild tenderness at the right lower abdomen, without rebound tenderness or guarding. Laboratory findings were only notable for an elevated C-reactive protein level of 0.63 mg/dl. An enhanced computed tomography (CT) scan showed dilated loops of the small intestine in the right paracolic gutter, which displaced the cecum and ascending colon medially (Fig. 1a, b). These findings led us to suspect small bowel obstruction caused by internal hernia around the cecum due to postoperative adhesion after appendectomy. She underwent emergency laparotomy.
Fig. 1

Abdominal enhanced computed tomography (CT) scan on admission. a Axial CT scan shows the small intestine in the right paracolic gutter and medially displaced ascending colon. b Coronal CT scan shows the closed loop sign of the small intestine in the right paracolic gutter (arrow) and hernia orifice (arrow head)

Intraoperative findings revealed the adhesion between the omentum and right paracolic gutter forming a cavity with the small intestine incarcerated (Fig. 2a, b). The cavity was bounded anteriorly by the omentum, posteriorly by the retroperitoneum, laterally by the parietal peritoneum, and medially by the ascending colon (Fig. 3). There was no abnormal adhesion in the ileocecal region, in contrast to this unique adhesion of the omentum along the ascending colon. The omentum was attached from the cecum to the hepatic flexure in a linear manner and naturally transited to the attachment of the transverse colon, suggesting the adhesion was congenital. We opened the orifice to release strangulation and transected omental adhesion from the orifice to the far end of the cavity near the hepatic flexure of the colon to prevent recurrence. The incarcerated small intestine was viable and we did not perform resection of the intestine. The patient was discharged on postoperative day 14 without complications.
Fig. 2

Intraoperative findings. a The hernia orifice located lateral to the ascending colon in the right paracolic gutter and posterior to the omentum (arrow). b The strangulated part of the closed loop bowel revealed no stenosis or ischemic change

Fig. 3

Schematic representation of intraoperative findings

Discussion

Internal hernia is defined as protrusion of abdominal organs into the foramen or recess within the abdominal cavity, and it accounts for 0.5–3% of all cases of intestinal obstruction [4]. Internal hernias are further classified into six types: paraduodenal, foramen of Winslow, paracecal, intersigmoid, transmesenteric or transmesocolic, and retroanastomotic [4]. Paracecal hernias account for 13% of all internal hernias [5].

In a PubMed search of the literature published from January 1980 to August 2019 using the keywords “paracecal hernia,” “retrocecal hernia,” “pericecal hernia,” and “ileocecal hernia,” we found 27 English language reports, describing 33 surgical cases of paracecal hernias including our case (Table 1). The median patient age was 67 years (range 0–92 years) and the male-to-female ratio was 5:6. Five cases had a history of abdominal surgery. Bowel resection was performed in five cases.
Table 1

Literature review of paracecal hernia cases from 1980 to 2019

No.

Authors

Reference

Year

Age

Sex

History of abdominal surgery

Meyer’s classification

Orifice

Surgical approach

Resection of bowel

Treatment of the hernia orifice

1

Rosen

[6]

1982

80

F

None

Retrocecal recess type

Retrocecal recess

Laparotomy

Closure

2

Rivkind

[3]

1986

0

F

NA

Lateral type

Paracolic sulci

Laparotomy

NA

3

Rivkind

[3]

1986

8

M

NA

Lateral type

Paracolic sulci

Laparotomy

Open

4

Rivkind

[3]

1986

25

M

NA

Lateral type

Paracolic sulci

Laparotomy

NA

5

Rivkind

[3]

1986

77

F

NA

Lateral type

Paracolic sulci

Laparotomy

NA

6

Rivkind

[3]

1986

83

F

NA

Lateral type

Paracolic sulci

Laparotomy

Closure

7

Lindsey

[7]

1997

86

F

NA

Retrocecal recess type

Retrocecal recess

Laparoscopy

Open

8

Patterson

[8]

2000

59

M

None

Lateral type

Paracolic sulci

Laparotomy

NA

9

Lu

[9]

2002

69

M

None

NA

NA

Laparotomy

NA

10

Lu

[9]

2002

67

F

Appendectomy

NA

NA

Laparotomy

NA

11

Omori

[10]

2003

90

F

None

NA

NA

Laparoscopy

Closure

12

Osadchy

[1]

2005

76

M

None

Lateral type

Paracolic sulci

Laparotomy

Closure

13

Fu

[11]

2006

34

M

None

Internal type

Inferior ileocecal recess

Laparotomy

Closure

14

Molto Aguado

[12]

2007

59

F

None

Lateral type

Paracolic sulci

Laparotomy

+

Closure

15

Hirokawa

[13]

2007

74

M

Appendectomy

Retrocecal recess type

Retrocecal recess

Laparoscopy-assisted

Open

16

Kabashima

[14]

2010

43

F

Invagination

Lateral type

Paracolic sulci

Laparoscopy

Open

17

Shibuya

[15]

2010

63

M

NA

Retrocecal recess type

Retrocecal recess

Laparotomy

Closure

18

Choh

[16]

2010

65

F

None

NA

NA

Laparotomy

+

Closure

19

Jang

[17]

2011

84

F

None

Lateral type

Paracolic sulci

Laparotomy

Open

20

Nishi

[18]

2011

70

F

None

Lateral type

Paracolic sulci

Laparotomy

Open

21

Kleyman

[19]

2013

34

F

None

NA

NA

Laparotomy

Closure

22

Saygin

[20]

2015

50

F

None

Lateral type

Paracolic sulci

Laparoscopy

NA

23

Kumar

[21]

2015

88

F

None

Internal type

Inferior ileocecal recess

Laparotomy

+

Ileocecal resection

24

Sasaki

[22]

2016

65

M

None

Retrocecal recess type

Retrocecal recess

Laparoscopy

Closure

25

Ogami

[23]

2016

92

M

Cholecystectomy

Retrocecal recess type

Retrocecal recess

Laparoscopy

Open

26

Ito

[24]

2017

83

M

None

Retrocecal recess type

Retrocecal recess

Laparotomy

Open

27

Chia

[25]

2017

32

M

None

Retrocecal recess type

Retrocecal recess

Laparoscopy

Open

28

Tayaran

[26]

2017

75

F

None

Lateral type

Paracolic sulci

Laparoscopy

Closure

29

Inukai

[27]

2018

54

M

None

Lateral type

Paracolic sulci

Laparoscopy-assisted

+

Open

30

Menezes

[28]

2018

40

M

None

NA

NA

Laparotomy

Open

31

Otani

[29]

2018

83

F

None

Lateral type

Paracolic sulci

Laparoscopy

Open

32

Aljaberi

[30]

2019

16

M

None

Internal type

Superior ileocolic recess

Laparotomy converted from laparoscopy

+

Ileocecal resection

33

Present case

 

2019

86

F

Appendectomy

Lateral type

Membranous adhesion of the omentum

Laparotomy

Open

NA not available, M male, F female

Meyer et al. [4] have classified paracecal hernia into four subtypes as internal type, retrocecal recess type, lateral type, and unclassifiable type (cecal recess type). In our case, the hernia orifice was located at the right lateral side of the cecum, and a loop of the small intestine was incarcerated in the right paracolic gutter, pushing the ascending colon medially. According to the Meyer’s classification, our case was considered to be a lateral-type paracecal hernia. Previous cases of lateral types have arisen in a peritoneal recess, and the herniation into the space surrounded by the omentum and paracolic gutter like our case has not been reported (Table 1).

Some mechanisms that may cause paracecal hernia have been suggested. One possibility is that the hernial orifice is a congenital anatomic structure. The anatomy of the paracecal peritoneum is attributed to ileocecal migration that occurs during intestinal rotation of the midgut in the fifth month of gestation. Adhesion of the ascending colon and mesentery to the retroperitoneum causes four kinds of peritoneal recesses: superior ileocecal recess, inferior ileocecal recess, retrocecal recess, and paracolic sulci [3, 31]. All of these recesses may become hernial orifices. Another possibility is acquired mechanisms, such as postsurgical or traumatic defects of the mesentery or omentum, postoperative adhesions, and increased pressure in the abdominal cavity related to obesity, coughing, or straining [9, 32]. In the present case, we observed that the small intestine was constrained in the right paracolic gutter covered with the omentum that adhered to the right abdominal wall. The omental attachment was seen from the level of the cecum to the hepatic flexure in a linear manner and naturally transited to the attachment at the transverse colon.

It has been reported that the omental attachment varies among individuals and may extend to the ascending colon [33]. In the development process, the omentum fuses with transverse colon first close to the hepatic flexure of the colon, second in the region of spleen, and last in the middle of the transverse colon until the 14th week of gestation. At 5 years of age, most of the intestines are covered by the omentum, which also extends beyond the flexures of the colon. This extended omentum might contact and be attached to the right abdominal wall in parallel along the ascending colon. Although our case had a history of appendectomy, adhesions were not seen in the ileocecal region in contrast to the reported case in which an adhesion band was seen at the wound of the previous McBurney appendectomy [3]. Thus, we have concluded that the paracecal hernia in our case arose from congenital adhesion of the omentum to the right paracolic gutter.

The clinical symptoms of paracecal hernia are the same as those of small bowel obstruction, namely abdominal pain, nausea, vomiting, constipation, and obstipation [1]. Currently, CT is an important tool for the evaluation of intestinal obstruction and acute abdominal diseases [31] and has become the first-line imaging technique in patients with suspected internal hernia. The CT findings of paracecal hernia include an encapsulated cluster of dilated small bowel loops interposed between the cecum and the abdominal wall, and mesenteric vessels converging toward the entrance of the hernia [1]. CT also gives the information to diagnose the types of paracecal hernia: a lateral shift of the ascending colon in internal type and an anterior shift in retrocecal recess type [34]. In our case, the internally displaced ascending colon was consistent with the lateral type.

Radical therapy for internal hernia is urgent surgery. The reduction of the strangulation is the first step when intestinal ischemia is suspected. Secondly, opening or closure of the hernia orifice is mandatory to prevent recurrence, although it is controversial whether the orifice should be left open or closed (Table 1). We opened the orifice by dissecting the omental attachment because the cavity was too deep to be closed completely without leaving a vacant space. Recently, laparoscopic surgery has been adopted for small bowel obstructions in favor of its high diagnosis rate and minimal invasiveness [27]. We performed open laparotomy for our patient because the dilated bowel was considered to fill up the abdominal cavity, leaving little room to move instruments, increasing the risk of iatrogenic bowel injury [35]. Nevertheless, preoperative diagnosis is indicated for an optimal surgical treatment.

Conclusion

We describe a unique case of paracecal hernia in which the internal hernia was due to membranous adhesion of the omentum to the right paracolic gutter. Surgeons should be aware of this paracecal hernia type, when they encounter the internal hernia.

Notes

Acknowledgements

Not applicable.

Authors’ contributions

TY wrote the manuscript. TY and KO performed the operation. NM, EM, CN, and TI edited the article. KO, JY, and MT supervised the editing of the manuscript. All authors have read and approved the final manuscript.

Funding

The authors declare that no funding was received for this study except for JY, who has conflicts of interests with Astellas Co., Pfizer Inc., and Sanofi K.K.

Ethics approval and consent to participate

Not applicable.

Consent for publication

Informed consent was obtained from the patient for the publication of this case report and any accompanying images.

Competing interests

JY received a research grant from Astellas Co., Pfizer Inc., and Sanofi K.K. MT received a research grant from Olympus Co. TY, KO, NM, EM, CN, and TI declare that they have no competing interests.

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Authors and Affiliations

  1. 1.Department of SurgeryShimonoseki City HospitalShimonosekiJapan

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