Ruptured middle cranial fossa arachnoid cyst with subdural hygroma
Diagnosis almost certain
Presentation
Severe headache and vomiting for 2 days. Clinician suspected space occupying lesion.
Patient Data
Age: 15 years
Gender: Male
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Arachnoid cyst (3.2 x 2.9 x 4.7 cm) is seen in left middle cranial fossa, filling the middle cranial fossa with subdural hygroma along left cerebral hemisphere (13 mm maximum thickness), causing mass effect over left fronto-temporo-parietal lobes and right sided midline shift of approximately 5 mm.
No intraparenchymal hematoma is noted.
Case Discussion
The case shows left middle cranial fossa ruptured arachnoid cyst (Galassi type II) with subdural hygroma and resultant mass effect.