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CT Differentiation of Mucinous and Nonmucinous Colorectal Carcinoma

Eun Young Ko1,2, Hyun Kwon Ha1, Ah Young Kim1, Kwon Ha Yoon3, Chang Sick Yoo4, Hee Cheol Kim4 and Jin Cheon Kim4

1 Department of Diagnostic Radiology, Asan Medical Center, University of Ulsan College of Medicine, 388-1 Poongnap-dong, Songpa-gu, Seoul 138-736, Korea.
2 Present address: Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
3 Department of Radiology, Hospital of Wonkwang University, Iksan, Jeonbuk, Korea.
4 Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.


Figure 1
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  		Fig. 1 —60-year-old woman with mucinous carcinoma in rectum. CT scan shows severe rectal wall thickening with large areas of low attenuation (arrow).

 

Figure 2
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  		Fig. 2 —47-year-old woman with nonmucinous carcinoma in rectum. CT scan shows mild rectal wall thickening with homogeneous enhancement (arrow).

 

Figure 3
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  		Fig. 3 —62-year-old woman with mucinous carcinoma in cecum and proximal ascending colon. CT scan shows eccentric bowel-wall thickening along with evidence of exophytic tumor growth posteriorly (asterisk). Large metastatic lymph node (arrow) is noted in medial side of tumor.

 

Figure 4
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  		Fig. 4 —74-year-old woman with nonmucinous carcinoma in distal ascending colon near hepatic flexure. CT scan shows concentric bowel-wall thickening (arrows).

 

Figure 5
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  		Fig. 5A —60-year-old woman with mucinous carcinoma in rectum. CT scan shows broad base of tumor in upper rectum.

 

Figure 6
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  		Fig. 5B —60-year-old woman with mucinous carcinoma in rectum. Lower portion of tumor forms large polypoid endoluminal mass.

 

Figure 7
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  		Fig. 6A —69-year-old woman with mucinous carcinoma in proximal transverse colon. CT scan shows large mass with heterogeneous enhancement.

 

Figure 8
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  		Fig. 6B —69-year-old woman with mucinous carcinoma in proximal transverse colon. Hypoattenuated area is greater than two thirds of tumor (asterisk), and enhancement in solid portion of tumor is less than that of normal bowel wall (arrow).

 

Figure 9
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  		Fig. 7 —34-year-old woman with nonmucinous carcinoma in proximal ascending colon. CT scan shows bowel-wall thickening is relatively homogeneous and greater than that of normal bowel wall. Hypoattenuated area is less than one third of tumor. Pericolic fat infiltrations with small regional lymph nodes are also noted (arrows).

 

Figure 10
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  		Fig. 8A —52-year-old woman with mucinous carcinoma in rectum. CT scans show small intratumoral calcification (arrow, A) within hypoattenuated area of eccentric bowelwall thickening.

 

Figure 11
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  		Fig. 8B —52-year-old woman with mucinous carcinoma in rectum. CT scans show small intratumoral calcification (arrow, A) within hypoattenuated area of eccentric bowelwall thickening.

 

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