Аннотация:The most common signs of tumors and inflammation of RLQ on CT images are bowel thickening, stranding of surround fat and enlarged lymph nodes. The analysis of bowel thickens shows that it was more prominent in tumors than in inflammatory. Pattern of bowel wall thickening of tumors is more irregular and asymmetric in contrary to symmetrical wall thickening in inflammatory diseases.
The enlargement of appendix is a strong indicator of its inflammation, but other inflammatory diseases and tumors can also cause it. The most significant enlargement of appendix occurs in patients with acute appendicitis and its complications. Other signs of inflammation include thickening of appendiceal and caecal wall, presence of appendicoliths and periappendiceal fat infiltration.
The degree of fat stranding adjacent to the thickened wall can help the diagnostics. More significant increase of fat density is seen in inflammatory diseases, especially in cases of complication of acute appendicitis, often accompanied with fluid collections. In tumors, the fat stranding is less prominent or absent.
The lymphadenopathy is often seen in inflammatory diseases and malignancies, but it cannot always be useful for establishment of the right diagnosis.