Does lung caviation with pneumonia mean its lung cancer?

Not neccessary: If the pneunomia is treated and the cavitary lesion goes away on shorterm follow up then you are good. However, if the lesion persist then further diagnostic test is needed. Please follow up with your doctor closely on this matter.

Lung Cavity Causes: Not at all! differential DX of cavitation on chest x-ray: 1 caveating pneumonia: s aureus, gram-negative bacilli (klebsiella, pseudomonas, legionella), anaerobes, mycobacteria, fungi, pneumocystis. 2 septic emboli, bacterial or fungal. 3 wegener's granulomatosis or pulmonary infarction 4 infected bullae or cysts. 5 cancer: primary or secondary. Clearly, your doctor will help sort these out.

Not necessary: A lung cavitation does not automatically means it's a cancer. It can be from infection or autoimmune disorders. Certain characteristics on ct such as a thick (> 1 cm thickness) and irregular wall may increase the chance of it being a cancer. If it does not go away with the right antibiotics it can be worrisome. Lung cancer can cause pneumonia and this can confounds the diagnosis.