Tumefactive parenchymal lesion of neurosarcoidosis responsive to infliximab.

Neurosarcoidosis is an uncommon manifestation of systemic sarcoidosis and can involve any part of the nervous system. Intraparenchymal tumefactive lesions are particularly rare and pose a diagnostic challenge due to their radiographic resemblance to high-grade gliomas or metastatic disease. Optimal management remains complex, especially in cases refractory to or dependent on glucocorticoids.