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The "Doughnut Sign" in Subdural Effusion
Richard T. Trackler, MD;
Kenneth E. Miller, MD;
Morton L. Cohen, MD
Am J Dis Child. 1975;129(3):373-374.
Abstract
A 7-month-old infant developed Haemophilus influenzae meningitis that failed to respond to appropriate therapy. Anterior fontanel subdural taps were negative. A subsequent sodium pertechnetate Tc 99m brain scan demonstrated a subdural fluid collection on the left, manifested as a "doughnut" sign. Following surgical evacuation of the effusion, the child recovered uneventfully.
Author Affiliations
From the departments of pediatrics (Dr. Cohen) and radiology (Dr. Miller), San Diego Children's Health Center; and the Department of Radiology, Sharp Memorial Hospital, San Diego, Calif (Dr. Trackler).
Footnotes
Received for publication April 18, 1974; accepted June 6.
Reprint requests to Department of Pediatrics, Children's Health Center, 8001 Frost St, San Diego, CA 92123 (Dr. Trackler).
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