Clubbing other diagnostic studies

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Overview

Other Diagnostic Studies

Schamroth’s test or Schamroth’s window test (originally demonstrated by South African cardiologist Dr Leo Schamroth on himself^[1]) is a popular test for clubbing. When the distal phalanges (bones nearest the fingertips) of corresponding fingers of opposite hands are directly apposed (placed against each other back to back), a small diamond-shaped “window” is normally apparent between the nailbeds. If this window is obliterated, the test is positive and clubbing is present.

Clubbing of the fingernail. The red line shows the outline of a clubbed nail.

The following image shows a bone scan of a person with a special form of clubbing called HPOA.

Bone scan of a patient with *Marie-Bamberger syndrome*

References

↑ Schamroth L (1976). “Personal experience”. S. Afr. Med. J. 50 (9): 297–300. PMID 1265563. Unknown parameter |month= ignored (help)

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[1] Schamroth L (1976). “Personal experience”. S. Afr. Med. J. 50 (9): 297–300. PMID 1265563. Unknown parameter |month= ignored (help)

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