Developer site: The content shown here is test data.

MyEClinic
MyEClinic
Health Dictionary AI Health Chat Find an Online Doctor
A serene Zen garden with raked sand and smooth stones, symbolising clarity and calm

Health Dictionary

Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.

Back to skin conditions

Clubbing other diagnostic studies

Introduction

Overview

Overview

Other Diagnostic Studies

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.
    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

References

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

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