The biopsy may make you cough up a little blood. In rare cases, there may be serious bleeding.

Air leak

When the needle is put into the lung, it may cause some air to leak out.

If the air leak is small, it may not cause any problems. If a lot of air leaks out, it could build up around your lung making you short of breath. The doctor may need to put a small tube in your chest for a while, so that the air can escape.