Macewen's sign

Macewen's sign
Differential diagnosis	Excess CSF

Macewen's sign or Macewen sign (/məˈkjuːɪn/) is a sign used to help to diagnose hydrocephalus[1] (accumulation of excess cerebrospinal fluid) and brain abscesses. Tapping (percussion) the skull near the junction of the frontal, temporal and parietal bones will produce cracked pot sound. Positive test is indication of separated sutures. This is due to raised intracranial tension.

The sign was discovered and described by Sir William Macewen (1848–1924), a surgeon and professor of the University of Glasgow, Scotland, who also described Macewen's operation for inguinal hernia. Mcevan sign seen in alcohol intoxication is different.

References

Regan, Joseph G. (July 1, 1918). "A CLINICAL CONSIDERATION OF MACEWEN'S SIGN: ESPECIALLY WITH REFERENCE TO ITS USE IN POLIOMYELITIS". American Journal of Diseases of Children. 16 (1): 13–22. doi:10.1001/archpedi.1918.01910130020002 – via jamanetwork.com.

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[1] Regan, Joseph G. (July 1, 1918). "A CLINICAL CONSIDERATION OF MACEWEN'S SIGN: ESPECIALLY WITH REFERENCE TO ITS USE IN POLIOMYELITIS". American Journal of Diseases of Children. 16 (1): 13–22. doi:10.1001/archpedi.1918.01910130020002 – via jamanetwork.com.