1. Volume 108, Issue 6, Pages 1751-1752 (December 1995)
Digital Clubbing Associated With Polymyositis and Interstitial Lung Disease 
Kurt W. Grathwohl, MC, USA, James W. Thompson, MC, USA, Bernard J. Roth, MC, USA, FCCP, Thomas A. Dillard, MC, USA, FCCP, Kathyrn K. Riordan, MC, USA 
CHEST 
Volume 108, Issue 6, Pages (December 1995)
DOI: /chest
Copyright © 1995 The American College of Chest Physicians Terms and Conditions

2. FIGURE 1
Finger clubbing with PM/DM associated with ILD. Objective findings of clubbing5 include increased hyponychial angles and phalangeal depth ratios. The hyponychial angle is formed by a line connecting the dorsal surface of the distal interphalangeal joint and the cuticle and a line joining the cuticle and the hyponychium (normal, <195 degrees). The phalangeal depth ratio consists of the thickness of the fingertip at the cuticle divided by the thickness of the finger at the distal interphalangeal joint (normal, <1.0).
CHEST  , DOI: ( /chest )
Copyright © 1995 The American College of Chest Physicians Terms and Conditions