Pulmonary Pearls - The Pearls Series Author:Steven A. Sahn, John E. Heffner Medical University of South Carolina, Charleston. Handbook of 100 clinical case presentations in respiratory medicine, with diagnosis and concise discussion. For residents and medical students. Companion to Pulmonary Pearls, 1988. Halftone illustrations. DNLM: Lung Diseases - radiography - case studies.