Based on these results and the radiological findings, the authors considered the disease to be a form of T-cell lymphoproliferative disorder, in spite of some clinical manifestations resembling lymphomatoid granulomatosis. Because the natural history of this disease condition was not obvious, and the general status of the patient was not deteriorating, we refrained from initiating immediate treatment. Meanwhile, another CT scan of the extracranial regions revealed cervical lymph node swelling.