👉 Lymphogranulomata, also known as lymphangiomas or "blood vessels tumors," are benign growths in the body caused by abnormal blood vessels. These tumors occur in various parts of the body including the skin, lungs, liver, and bones. They can be either solid (e.g., a tumor within a bone) or fluid-filled (e.g., a tumor within a vein). The exact cause is not known, but it has been suggested that they may be related to