This section is from the book "Materia Medica And Therapeutics Inorganic Substances", by Charles D. F. Phillips. Also available from Amazon: Materia medica and therapeutics.
In cases of fibrous and fibro-cystic bronchocele, where calcareous degeneration has not occurred, local applications of iodine should be combined with its internal use. If the part be tender or inflamed, soothing fomentations, or even moderate leeching, may be needed before using iodine; then either the liniment may be painted on once or twice daily for several days, according to the degree of irritation produced, or an iodized collar may be worn (made with iodine sprinkled on wool), or iodoform, or iodide of mercury ointment may be rubbed in as described (v. Mercury). I have sometimes been disappointed with the mere external use of iodine in bronchocele, but have had excellent results from its injection into fibrous and fibro-cystic cases (25) in which I have used it. In one large fibro-cyst, as to which there was difficulty of diagnosis, no fluid being suspected, 30 min. of the tincture were injected, and considerable diminution of the growth followed; a month afterward 3 oz. of fluid were drawn off, and the cyst injected with 2 dr. of a solution containing 1 part of tincture to 3 of water. The man was highly scrofulous, and the growth of long duration; but, after the inflammatory condition set up by the iodine had subsided, the bronchocele disappeared and gave no further trouble. The only case in which dangerous results occurred was one in which some iodine solution escaped into the cellular tissue, and sloughing of the part followed. Nineteen out of the 25 cases got well, 2 of them having been injected seven times. Lately, Dr. Lucke, of Berne, has reported equally good results in the fibrous form of enlargement. Of 16 cases treated by him, 11 were cured and 4 improved; and Dr. Morell Mackenzie, who at first considered this method inferior to others, records his later experience of it as very favorable. He obtained unexpected cures in fibrous and adenoid cases from the weekly or biweekly injection of 30 drops of tincture (Medical Times, i., 1872, and British Medical Journal, ii., 1873). Dr. Luton speaks well of similar injections of iodic acid - 1 part to 5 of water; he uses about 1/2 dr. at one time (Lancet, ii., 1873, p. 457). (v. Internal Use.)