Sacral pain as the initial symptom in primary Hodgkin's lymphoma of bone. 
Progressive painless enlargement of peripheral lymph nodes is the most common presentation of Hodgkin's lymphoma.  The bone involvement is seen particularly in the later stages, but very rarely in early stages of the disease.  Primary osseous Hodgkin lymphoma is exceedingly rare.  Here, we report a case of Primary osseous Hodgkin lymphoma in a 35-year-old male presenting with osteolytic lesions of iliac and sacral bone without other symptoms.  Histopathology examination revealed Hodgkin's disease.  All other investigations (including computed tomography of the chest, abdomen and pelvis, bone marrow aspiration) were negative for occult disease.  Polychemotherapy was started and the symptoms resolved.  The case report highlights the importance of clinical suspicion of primary Hodgkin lymphoma of the bone, especially those involving the pelvis bones.