Hodgkins lymphoma. Computed tomography (CT) scan showing lymphoma nodules (dark grey spots) in the liver (left) and the spleen (right) of a 31-year-old male patient with Hodgkins lymphoma. Hodgkins lymphoma is a malignant (cancerous) growth of white blood cells (lymphocytes). The most common symptom is swollen, non-painful lymph nodes in the upper body, but it can also develop in other organs and tissues. It is most common in young adults and those over 50. Treatment is with chemotherapy and radiotherapy.