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) .
Rhesus monkey was just used as a test to test the blood, the name comes from the test that they used. They called this the rh factor.. OBVIOUSLY the blood itself has nothing to do with rhesus monkeys. It is a human surface antigen. If you do not have this on your blood cells, you are called rh negative.. Basically it comes from your human genetic inheritance.