The MR imaging findings in a patient with non-Hodgkin's lymphoma with unusual involvement of the sella, pituitary stalk and left parasellar region are reported here. On the basis of the MR imaging findings, the initial differential diagnosis included invasive pituitary adenoma, a granulomatous lesion and en plaque meningioma. Trans-sphenoidal biopsy of the sellar mass showed chronic inflammatory changes and the patient was initially treated for tuberculosis. Because follow-up imaging showed the lesion to be progressive, a biopsy was done of an enlarged right inguinal lymph node. This revealed non-Hodgkin's lymphoma.
An unusual combination of primary cerebral lymphoma and meningioma occurring contiguously was encountered in a 71-year-old male patient. The possibility of two separate tumours was suspected radiologically and confirmed by histology. The association of primary lymphoma and meningioma is extremely rare. Following review of the literature, current evidence would suggest that the association is probably coincidental.
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