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Objective: To comparatively analyze CT, MRI and pathological findings of adenosquamous carcinoma of pancreas (ASqC) and invasive ductal adenocarcinoma of pancreas (IDAC). Methods: Clinical, imaging and pathological data of 11 patients with ASqC (ASqC group) and 22 with IDAC (IDAC group) confirmed with pathology were retrospectively analyzed. The differences of imaging findings (lesion location, size, morphology, central necrosis, peak enhancement time, bile duct dilatation, main pancreatic duct dilatation) and pathological features (nerve tract invasion, lymph node metastasis, vascular tumor emboli, Ki-67) were compared between 2 groups. Results: CT showed significant differences in lesions' diameter, morphology, central necrosis and peak enhancement time between 2 groups (χ2=7.34, 6.82, 10.25, 5.57, all P<0.05). MRI showed that there was no significant difference of lesion's signal on T1WI and dynamic enhancement between 2 groups, while IDAC group had lower T2WI signals than ASqC group. Pathological results showed that the incidence of vascular tumor emboli in ASqC group (5/11, 45.45%) was higher than that in IDAC group (2/22, 9.09%, χ2=5.80, P=0.02). Conclusion: ASqC and IDAC have certain pathological and imaging characteristics. Combination with clinical data is helpful to differential diagnosis.
ABSTRACT
Objective To comparative study the effect on colorectal cleansing of CT colonography with gulping down 10 mg bisacodyl before or 1 h after oral taking 2 liter polyethylene glycol .Methods Forty participants with informed consent were appor‐tioned to group A ,group B randomly ,20 cases in each group .On the day before CT colonography ,participants in group A oral took 20 mL of 40% W/V barium sulfate prior to 3 mealtime ,and 20 mL of 60% diatrizoate meglumine diluted in 250 mL of water after supper ,then gulped down 10 mg bisacodyl enteric‐coated tablets 1 hour before oral taking 2 liter polyethylene glycol electrolyte so‐lution .Participants in group B were the same as that in group A ,with the exception of gulping down 10 mg bisacodyl enteric‐coated tablets 1 hour after oral taking 2 liter polyethylene glycol electrolyte solution .Cleansing efficacy of stool and fluid ,and attenuation value of remainder fluid between the two groups were analyzed statistically .Results In group A ,score of cleansing efficacy of stool (1 .96 ± 0 .11) was lower than that in group B (2 .01 ± 0 .12) ,segments with good cleansing efficacy of stool (87/120 segments , 72 .50% ) was higher than that in group B (83/120 segments ,69 .17% ) ,the difference was not statistically significant (P>0 .05) .In group A ,score of cleansing efficacy of fluid (1 .50 ± 0 .06) was lower than that in group B (1 .53 ± 0 .06) ,segments with good cleansing efficacy of fluid(113/120 segments ,94 .17% ) was higher than that in group B (111/120 segments ,92 .50% ) ,the differ‐ence was not statistically significant (P>0 .05) .Attenuation value of remainder fluid [(729 ± 29)HU ] in group A was higher than that in group B[(653 ± 25)HU] ,the difference was statistically significant(P<0 .05) .Conclusion Gulping down 10 mg Bisacodyl before or after oral taking 2 liter polyethylene glycol has no effect on cleansing of stool and fluid ,with good cleansing efficacy .The former has better cleansing efficacy of fluid ,is beneficial to detecting polyps for CT colonography .