After an array of CT scans and other tests, I underwent a biopsy. Apparently, the doctors expected to find lung cancer, and they were surprised that the biopsy showed lipoid pneumonia. There the oily material causes both acute and chronic inflammation, hence the name lipoid pneumonia. This unusual condition was first discovered in 1925, when the use of petroleum-containing nasal medication was popular medical therapy. The condition has also been seen in people who use excessive quantities of lip balm.
Lipoid pneumonia causes cough and fever.
The most successful treatment is surgical resection of the inflamed area.