Other causes of mesenteric adenopathy have typical clinical symptoms and do not produce the large bulky adenopathy that results in the sandwich sign. Mesenteric lymphomas can also show retroperitoneal adenopathy and increased attenuation of the mesentery (misty mesentery). In our case, the absence of symptoms, imaging findings of mesenteric soft-tissue nodules producing sandwich sign and retroperitoneal lymph nodes made lymphoma the most likely diagnosis.
If you're rhesus positive (RhD positive), it means that a protein (D antigen) is found on the surface of your red blood cells. If you do not have the D antigen, you will be rhesus negative (RhD negative). Most people are rhesus positive (NHS BT 2014) .
Looks good on paper. The test relies on the antigens that are present on the surface of red blood cells. Type A blood contains red blood cells with A antigens, B with B antigens, AB with both, and O with neither. The presence of a separate D antigen determines whether the blood type is âpositiveâ or ânegativeâ, also known as rhesus positive or negative. Blood also contains antibodies, which find and destroy invaders.