Primary cerebral lymphoma –
**Core Concept**
Primary cerebral lymphoma is a rare, aggressive type of non-Hodgkin lymphoma that arises from the lymphoid cells within the central nervous system (CNS). It is a type of extranodal lymphoma, meaning it occurs outside of lymph nodes. The pathogenesis of primary cerebral lymphoma involves the proliferation of malignant lymphocytes that infiltrate the brain and spinal cord.
**Why the Correct Answer is Right**
Primary cerebral lymphoma is often associated with immunosuppression, particularly in patients with HIV/AIDS or those undergoing immunosuppressive therapy. The malignant lymphocytes infiltrate the brain parenchyma and disrupt the blood-brain barrier, leading to perivascular cuffing and necrosis. The diagnosis is often made using MRI or CT scans, which show characteristic periventricular and deep white matter lesions.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because primary cerebral lymphoma is not typically associated with systemic lymphadenopathy, unlike other types of lymphoma.
**Option B:** This option is incorrect because primary cerebral lymphoma is a non-Hodgkin lymphoma, not a Hodgkin lymphoma.
**Option C:** This option is incorrect because primary cerebral lymphoma is not typically associated with a strong association with Epstein-Barr virus (EBV), unlike other types of lymphoma.
**Clinical Pearl / High-Yield Fact**
Primary cerebral lymphoma is often mistaken for other CNS pathologies, such as glioblastoma or metastatic brain tumors. Therefore, a high index of suspicion is necessary for diagnosis, especially in immunocompromised patients.
**Correct Answer: B. Primary cerebral lymphoma is a rare, aggressive type of non-Hodgkin lymphoma that arises from the lymphoid cells within the central nervous system (CNS).**