Question:

What is the typical appearance of desmoids tumors on CT?
1. Isodense masses relative to muscles with a significative enhancement during arterial phase
2. Hypodense masses relative to muscles without enhancement
3. Isodense or hypodense masses relative to muscles with variable enhancement
4. Hyperdense masses relative to muscles with a significative enhancement
5. Hypodense masses relative to muscles with enhancement during portal-late phases





Answer:

The correct answer for the question "What is the typical appearance of desmoids tumors on CT?" is:

3. Isodense or hypodense masses relative to muscles with variable enhancement



Explanation
1) Most desmoid tumors are isodense relative to muscles but they could be hypodense on early stage or if there are areas of necrosis and the enhancement is variable (On CT scans, most mesenteric desmoid are isodense relative to muscle, although large lesions may display areas of low attenuation caused by necrosis)

2) Desmoid tumors could be hypodense relative to muscles without enhancement but this isn`t the typical aspect (On CT scans, most mesenteric desmoid are isodense relative to muscle, although large lesions may display areas of low attenuation caused by necrosis.)

3) Desmoids tumors could be hypodense or isodense relative to muscles with variable enhancement (On CT scans, most mesenteric desmoid are isodense relative to muscle, although large lesions may display areas of low attenuation caused by necrosis.)

4) Desmoid tumors are rarely hyperdense relative to muscles (On CT scans, most mesenteric desmoid are isodense relative to muscle, although large lesions may display areas of low attenuation caused by necrosis.)

5) Most desmoids tumors are isodense relative to muscles but they could be hypodense on early stage or if there are areas of necrosis and the enhancement is variable (On CT scans, most mesenteric desmoid are isodense relative to muscle, although large lesions may display areas of low attenuation caused by necrosis.)



From the manuscript:
Gardner syndrome complicated with hydronephrosis. A case report
Radiology Case. 2010 Mar; 4(3):19-23


This article belongs to the GI section.




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From the manuscript

Gardner syndrome complicated with hydronephrosis. A case report

Free full text article: Gardner syndrome complicated with hydronephrosis. A case report

Abstract
Gardner syndrome is an autosomal dominant disease characterized by the presence of colonic polyposis, osteomas and soft tissue tumors. We present a case of a man who was admitted for a relapse of adenocarcinoma of the rectum. CT-staging showed multiple locations of desmoid tumors and osteomas, with final diagnosis of Gardner syndrome. The follow-up CT, after surgery and chemotherapy, showed a relapse of the lesions with hydronephrosis due to ureteral compression.






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