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T2WI: An extra-axial collection with CSF signal intensity and the mild mass effect is seen in the right hemisphere.
FLAIR: Areas of high signal intensity representing SAH are seen in the sulci of the right temporal lobe.
Differential diagnoses include subdural hygroma, chronic subdural hematoma, and cerebral atrophy. The presence of mild sulcal effacement and mass effect makes the diagnosis of brain atrophy less likely.
Due to the acute nature of trauma according to the patient description, acute traumatic subdural hygroma is more likely.
- 1. John R. Haaga, Daniel Boll. Computed Tomography & Magnetic Resonance Imaging Of The Whole Body E-Book. (2008) ISBN: 9780323076210
- 2. Zanini MA, Resende LA, Freitas CC, Yamashita S. Traumatic subdural hygroma: five cases with changed density and spontaneous resolution. (2007) Arquivos de neuro-psiquiatria. 65 (1): 68-72. Pubmed