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) .
An Rh positive fetus developing in an Rh negative mother runs the risk of developing Rhesus disease. Doctors match the patient's Rh factor with the donor blood when possible to reduce the risk of complications. People with any blood type can receive type O blood.