Tuberculosis (TB) suspect is any one who has signs or symptoms suggestive of TB (eg >2 weeks productive cough).
Definite TB is considered in patients with culture or molecular line probe assay positive for Mycobacterium tuberculosis, or in patients with at least 1 sputum smear positive for acid-fast bacilli.
TB cases are also classified based on the disease anatomical site, bacteriological results (including drug resistance), previous treatment history and patient's HIV status.
Pulmonary TB is a case of TB that involves the lung parenchyma.
Miliary TB is considered as PTB since lung lesions are also seen.
TB in the pleural effusion, mediastinal and/or hilar lymph nodes with no evidence of abnormalities in the chest x-ray are considered extrapulmonary TB.
Patients presenting with both PTB and extrapulmonary TB are classified as a case of PTB.
The syndrome of sensory neuronopathy and detection of anti-Hu antibody in 2010 were very strong indications of the presence of a malignant tumour. In a series of 200 patients positive for anti-Hu, 83.5 percent were found to have cancer, and 90 percent of the cancer cases were small-cell lung cancer.
Dr Michael Lim, consultant of the Division of Paediatric Pulmonary and Sleep in National University Hospital, Singapore, shares his insights with Pearl Toh on diagnosing and managing paediatric asthma in the primary care setting.