Lymphoma in Meckel cave mimicking trigeminal schwannoma – analysis of misdiagnosis causes and insights into imaging: Case report

The "perineural growth" pattern and "dumbbell" morphology of this Meckel cave lymphoma were highly deceptive and directly led to misdiagnosis. Lymphoma should be critically included in the differential diagnosis for Meckel cave lesions presenting with rapid progression (<6 months), schwannoma-like imaging features, and absence of prominent T2 hyperintensity. Preoperative cerebrospinal fluid analysis or targeted biopsy can prevent unnecessary surgical interventions and ensure timely administration of standardized chemotherapy.