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Table 3 Imaging Findings Used to Diagnose AMC

From: Symptoms and diagnostic criteria of acquired Megacolon - a systematic literature review

Author Pub. Date No. Pts Physical Characteristics Observed in Patients Diagnosed with AMC Modality
Lane and Todd [19] 1977 42 Partial or total dilatation large bowel BE
Ryana [29] 1982 6 Patients dilated colon proximal to sigmoid BE/AXR
Preston et al. [9] 1985 20 Rectal diameter level S2 10+/− 3 cm (mean)
Rectal diameter level pelvis brim 9.5+/− 2.4 cm (mean)
Sigmoid diameter 10+/− 3.5 cm (mean)
Descending diameter 7.2+/− 2.1 cm (mean)
Transverse diameter 7.8+/− 1.4 cm (mean)
Ascending diameter 8.2+/− 1.6 cm (mean)
Conclusion that sigmoid width at pelvic brim greater than 6.5 cm abnormal
DCBE
Stabile et al. [3] 1991 40 Subjective proximal colonic enlargement and loss of haustral pattern
Descending colon “usually” greater than 6 cm
Ascending colon “usually” greater than 8 cm
BE
Koch et al. [35] 1993 6 Sigmoid diameter 6.5-15 cm (range), 10 cm (mean) AXR
Gattuso et al. [36] 1996 3 Rectal diameter 4-11 cm (range)
Colon diameter 6-10 cm (range)
 
Meier-Ruge et al. [37] 2006 63 Distal and proximal colon circumference hemicolectomy 9-12 cm Specimen
Iantorno et al. [24] 2007 9 Sigmoid diameter 10+/− 2 cm (mean) BE
  1. Pts Patients, DCBE Double-contrast barium enema, BE Barium enema, AXR Abdominal X-Ray
  2. a amongst patients with volvulus