Meckel’s diverticulum and intestinal duplication detected by Tc-99m pertechnetate scintigraphy. Clin Nucl Med. 2010;35:275-276. [PMID: 20305423 DOI: 10.1097/rlu.0b013e3181d18eca]

Coexistence of cecal duplication cyst and Meckel's diverticulum presenting as intestinal obstruction: A case report

INTRODUCTION

Enteric duplication cysts (EDC) are rare anomalies of the gastrointestinal tract, with only 0.4 % occurring in the cecum. Meckel's diverticulum (MD) is a common congenital anomaly affecting up to 2 % of the population. The simultaneous occurrence of these two conditions is rare with no existing guideline on treatment.

CASE PRESENTATION

An 11-month-old boy presented with fever, vomiting, and abdominal distension. A contrast-enhanced computed tomography scan confirmed the diagnosis of an enteric duplication cyst causing intestinal obstruction. The patient underwent exploratory laparotomy, during which a cecal duplication cyst measuring 30 × 20 mm was found along with MD in the distal ileum. Right limited hemicolectomy was performed. Histopathological examination revealed features consistent with an enteric duplication cyst and the presence of gastric mucosal heterotopia.

CLINICAL DISCUSSION

Differentiating EDC from MD is a significant challenge, as both can present with similar symptoms and be positive on a Tc-99 m radionuclide scan. The final diagnosis of EDC and MD can only be made by correlating the imaging findings with the surgical findings and pathological features.

CONCLUSION

Cecal duplication cysts should be considered a differential diagnosis in infants who present with intestinal obstruction. Although their presentation may resemble that of Meckel's diverticulum, both conditions can coexist. Excision of duplication cysts in children is considered a safe and efficient treatment approach.

Menstruation Confounding the Correct Interpretation of 99m Tc-RBC Bleeding Scan

ABSTRACT

99m Tc-RBC bleeding scan in a 17-year-old adolescent girl showed an increased focal activity in the pelvis. However, SPECT/CT showed that this activity was located in the uterus, which was considered a normal variant considering that the patient was in her fourth day of the menstrual period. Subsequent 99m TcO 4- Meckel scan showed the typical characteristic of ectopic gastric mucosa in the small bowel. Postsurgical pathology confirmed the diagnosis of ectopic gastric mucosa. This case suggested the menstrual period uterus should be included as differential diagnosis of 99m Tc-RBC scan.

Imaging congenital anomalies of the ileum in adults:a pictorial review

The ileal loops are anatomical location for the majority of congenital anomalies affecting the gastrointestinal tract. These include Meckel's diverticulum, ileal duplication, dysgenesis, atresia, mucosal diaphragm, and malposition of the ileum. Symptomatic lesions that often present with abdominal pain, intestinal obstruction or bleeding are usually diagnosed and treated during infancy and childhood. However, many of these congenital conditions may remain clinically silent and detected incidentally in adults undergoing radiological evaluation for unrelated medical reasons. This article presents the spectrum of the congenital ileal anomalies and their distinct features on small bowel examination and CT of the abdomen.

An ileal duplication cyst case report: From diagnosis to treatment

Enteric duplication cysts (EDCs) are rare congenital malformations of the children and can develop everywhere along the gastrointestinal (GI) tract, being the ileum the most frequent localization. We herein present an unusual case of duplication cyst of ileal origin who show a tubular morphology and doesn't communicate with GI lumen. A 2-month-old boy was admitted to our hospital for investigation of an anechoic formation of the lower right abdomen for the surgical planning. The patient was asymptomatic. Ultrasound (US) and magnetic resonance imaging (MRI) showed features of a cystic lesion. Laparoscopic surgery was performed and the cyst excised. Macroscopic examination and histologic findings confirmed the diagnosis of a enteric duplication cyst arising from the ileum. In a patient with an abdominal cystic mass, although asymptomatic, it's worth assessing the nature of the lesion and planning a surgery in order to avoid future complications. A correct use of diagnostic it's fundamental to identify the etiology and the characteristics of a cystic mass.

Ileal duplication mimicking intestinal intussusception: A congenital condition rarely reported in adult

Intestinal duplication is an uncommon congenital condition in young adults. A 25-year-old man complained of chronic, intermittent abdominal pain for 3 years following previous appendectomy for the treatment of suspected appendicitis. Abdominal discomfort and pain, suggestive of intestinal obstruction, recurred after operation. A tubular mass was palpable in the right lower quadrant. Computed tomography enterography scan identified suspicious intestinal intussusception, while Tc-99m pertechnetate scintigraphy revealed a cluster of strip-like abnormal radioactivity in the right lower quadrant. On exploratory laparotomy, a tubular-shaped ileal duplication cyst was found arising from the mesenteric margin of the native ileal segment located 15 cm proximal to the ileocecal valve. Ileectomy was performed along with the removal of the duplication disease, and the end-to-end anastomosis was done to restore the gastrointestinal tract continuity. Pathological examination showed ileal duplication with ectopic gastric mucosa. The patient experienced an eventless postoperative recovery and remained asymptomatic within 2 years of postoperative follow-up.

Rectal juvenile polyp detected on (99m)Tc-pertechnetate abdominal scintigraphy (Meckel scan)

An 8-year-old boy presented with first episode of rectal bleeding. Initial hemoglobin was 9 g/dL. A Meckel scan showed a hyperemic focus in the lower pelvis. Colonoscopy identified a juvenile polyp with dysplasia in the rectosigmoid region. It is important to carefully evaluate the dynamic flow images in the Meckel scan because pathology other than a Meckel diverticulum may be identified.

Double-balloon enteroscopy for diagnosis of Meckel's diverticulum: comparison with operative findings and capsule endoscopy

BACKGROUND

Meckel's diverticulum (MD) is one of the most common congenital gastrointestinal malformations. It is difficult to make a preoperative diagnosis of MD. To date, few data are available describing the diagnosis of MD by double-balloon enteroscopy (DBE) and capsule endoscopy (CE).

METHODS

To assess the value of DBE in the diagnosis of MD and comparatively evaluate the diagnostic yield of DBE and CE for MD. A single-center study was performed on patients with a confirmed diagnosis of MD by surgery and postoperative pathology between January 2003 and December 2011.

RESULTS

Seventy-four patients (60 males) with a mean age of 29.0 ± 14.3 years were analyzed; 33 (55.0%) were between 21 and 40 years of age. Gastrointestinal bleeding was the major finding in 86.5% of the patients who were referred for DBE or CE examination. The mean duration of symptoms was 32.3 ± 48.7 months. In the 74 patients, the diagnostic yield of DBE for MD before surgery was 86.5% (64/74), and correct diagnoses were made in the majority of cases by retrograde DBE, with a few cases by antegrade DBE. In the 26 patients undergoing CE before DBE, the overall diagnostic yield of DBE was 84.6%, significantly greater than that of CE (7.7%, P < .000, McNemar's χ(2) test). Poor agreement was found between the 2 modalities (kappa = 0.03).

CONCLUSION

For patients who are highly suspected of having MD, DBE provides a safe, effective, and reliable means of diagnosis before surgery.