The most common types of lymphoma are: Follicular lymphoma, small lymphocytic lymphoma, and large cell lymphoma. As lymphoma grows it can cause problems all over the body. In the lungs it affects breathing, and fluid can accumulate around the lungs, in the abdomen it can cause pain and fluid, or affect the kidneys. A PET scan and a CT scan are usually performed, as well as blood tests, including LDH.