Female, 33 years old, with nontraumatic subarachnoid hemorrhage. Subarachnoid blood product is again seen within the left central sulcus, some of the left middle frontal sulci, and the right superior frontal sulcus, similar in distribution and quantity to that seen on the prior CTs. No other definite areas of subarachnoid hemorrhage are seen. No parenchymal or intraventricular hemorrhage is detected.The cortex surrounding the subarachnoid hemorrhage shows very mild edema without significant generalized mass effect. Otherwise, parenchymal morphology and signal characteristics are within normal limits. No restricted diffusion is seen apart from that artificially induced by the blood product. The ventricular system is normal in size and morphology.
Subarachnoid blood product is redemonstrated appearing similar in distribution and quantity to that noted on prior CTs. The blood induces very mild edema in the adjacent brain cortex, but there is no significant generalized mass effect. No parenchymal or intraventricular hemorrhage is suspected. No clear underlying etiology for the hemorrhage is seen.