CT GUIDED TRANSTHORACIC NEEDLE ASPIRATION BIOPSY

EFFECT OF SIZE OF THE LESION ON THE RATE OF PNEUMOTHORAX

Abstract

Objectives: To analyze the rate of Pneumothorax after CT guided TNAB of lung masses , and correlating it with the size of the lesion. Design: Descriptive study. Setting: Department of Radiology Mayo Hospital, Lahore. Period: From June 2002 to April 2003, Patients and method: Seventy patients underwent CT guided FNA of the chest masses. Results: Out of Seventy, 18 patients i.e.; 26 % developed Pneumothorax. Lesion less than 1 cm , out of 6 patients 3 developed pneumothorax ( 50 %), lesions 1-2 cm 5 out of 11 developed
pneumothorax(45%), lesions with size of 2-3 cm 5 out of 14 patients developed pneumothorax ( 35%), lesions between 3-4 cm 2 out of 8 developed pneumothorax (25%), lesion sized 4-5 cm 1 out of 15 developed pneumothorax (6%), and lesion with more than 5 cm size 1 out of 16 developed pneumothorax ( 6%) . Conclusion: The study shows that the rate of Pneumothorax after CT guided TNAB of Lung Masses
increases as the size of the lesion decreases.