Fig 3. A 34-year-old man of the pseudo-SAH(+) group. He had CPA due to suffocation. He was resuscitated immediately but did not recover from coma. A, On the first day, no abnormal finding is seen. B, On the eighth day, the brain shows diffuse low attenuation with obliteration of cisterns and cerebral sulci and narrowed ventricles. HDAs mimicking SAH are noted along the bilateral Sylvian valleculae and tentorium cerebelli. CT values of the HDA of the Sylvian vallecula and the brain parenchyma are 36 and 23.5 HU, respectively. C, On the 129th day, brain edema becomes more severe. The SAH-like HDAs become more prominent.