J Korean Radiol Soc.  1994 Feb;30(2):289-297.

Plain Radiographic Findings of Lung Cancer with Delayed Diagnosis

• Choe KO
• Chung JI

Abstract

PURPOSE
In Korea, Lung cancer is the Second most common prevailing malignancy among male population next to stomach cancer. Although CT scan and MRI is widely used in the staging of lung cancer, plain chest x-ray still plays an important role in screening and diagnosis. Our intention was to review the confusing radiographic features which result in delayed diagnosis of lung cancer.
MATERIALS AND METHODS
Of the 160 patients with lung cancer evaluated by us, 62 patients(39%) with delayed diagnosis had average diagnostic duration of 5.1 months compared with 2.1 months for those without delay. We reviewed the plain chest x-ray findings of those 62 patients.
RESULTS
The diagnosis of lung cancer was delayed more than half of the cases under the impression of intrathoracic tuberculosis. Upon reviewing the roentgenologic findings in patients with diagnostic delay, central type appeared as a small hilar or mediastinal mass with or without obstructive pneumonia. Peripheral type appeared as an ill-defined pulmonary nodule, a nodule hidden by overlapping structures, or as a lung cancer associated with pulmonary tuberculosis. Some cases were misinterpreted as extranodal spread of malignancy.
CONCLUSION
To solve above mentioned problems, we recommend proper understanding of natural history of lung cancer, incorporation of high kVp technique in chest radiographs, routine acquisition of lateral chest radiograph to increase diagnostic accuracy, and appropriate use of CT scan in cases of difficult diagnosis.

MeSH Terms

Delayed Diagnosis*
Diagnosis
Humans
Intention
Korea
Lung Neoplasms*
Lung*
Magnetic Resonance Imaging
Male
Mass Screening
Natural History
Pneumonia
Radiography, Thoracic
Stomach Neoplasms
Thorax
Tomography, X-Ray Computed
Tuberculosis
Tuberculosis, Pulmonary