Patient characteristics and time interval between gadolinium administration and increased signal in the subarachnoid space on FLAIR

Patient No.	Age (yr)	Interval^a (days)	Gadolinium (mL/kg)	Creatinine Level (mg/dL)	Lumbar Puncture	Other Pertinent Findings
1	74	2	0.82	4.4	Negative^b	Minimal leukoaraiosis
2	21	6	0.42	4.1	Negative	None
3	73	6	0.27	4.4	CSF protein 50 mg/dL, otherwise negative	Acute occipital infarct
4	70	1	0.35	2.5	CSF protein 154 mg/dL, otherwise negative	Old infarction frontal lobe, tiny anterior meningioma without mass effect
5	79	1	0.24	2.4	No CSF collected	Right PCA infarct, prostate metastasis to the clivus
6	81	1	0.61	1.5	CSF protein 108 mg/dL	Minimal leukoaraiosis
7	74	1	0.31	1.0	Negative	None
8	68	1	0.43	0.9	No CSF collected	Right carotid occlusion with chronic watershed infarct
9	79	1	0.63	1.0	Negative	Old lacunar infarcts
10	65	2	0.52	1.2	Negative	None
11	56	2	0.40	2.3	Negative	None

Note:—PCA indicates posterior cerebral artery.
a Between gadolinium administration and increased signal in the subarachnoid space on FLAIR.
b For subarachnoid hemorrhage, infection, or malignant cells.