Radiological evidence of lymphatic drainage of bone marrow cavity in long bones

Injection of Lipiodol UF into the distal epiphyses of tibia and femur in the dog was followed within several minutes by visualization of lymphatics draining the bone. Some of the radioopaque material was retained in the bone marrow cavity and tiny lymph vessels originating in that area could be seen. Contrast medium filled also the popliteal lymph node. The problem of migration of bone marrow lymphocytes through the lymphatics to the regional lymph nodes is discussed.