Adult medulloblastoma mimicking Lhermitte-Duclos disease: can diffusion weighted imaging help?
Lhermitte-Duclos disease, also known as dysplastic cerebellar gangliocytoma, is a rare cerebellar benign tumor with characteristic appearance of thickened cerebellar folia giving a laminated or striated appearance, quite diagnostic of the condition. We had seen a patient with medulloblastoma with imaging findings suspicious for thickened cerebellar folia reminiscent of Lhermitte-Duclos disease. However, it showed patchy contrast enhancement and restricted diffusion on diffusion-weighted imaging, which are not typically associated with Lhermitte-Duclos disease. Presence of restricted diffusion proved to be a useful diagnostic feature for differentiation between the two lesions. This patient highlights the importance of obtaining all the MR imaging sequences in suspected Lhermitte-Duclos disease and histological diagnosis if there is doubt.
Department of Radiodiagnosis, Dayanand Medical College and Hospital, Ludhiana, Punjab, India. drpuneetmittal@gmail.com
Puneet
P
Mittal
Kamini
K
Gupta
Kavita
K
Saggar
Supreet
S
Kaur
D002528:Cerebellar Neoplasms / Q000175:diagnosis*; D003287:Contrast Media; D038524:Diffusion Magnetic Resonance Imaging; D006223:Hamartoma Syndrome, Multiple / Q000175:diagnosis*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008527:Medulloblastoma / Q000175:diagnosis*; D055815:Young Adult
D003287:Contrast Media