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.
The application of ferric injections to these cases, though often successful, was soon found to require as much caution as in the more serious malady of aneurism. Thirty drops of the tincture injected into a naevus of the scalp caused erysipelas and sloughing before cure resulted (Medical Times, ii., 1853); in a few cases, situated about the face, immediate death resulted, this being sometimes clearly due to a clot formed in a large vein (Archives de Medecine, November, 1868; Lancet, ii., 1867). In a few other cases cerebral embolism and softening or pyaemia followed (Lancet, i., 1874; Bulletin de Thera-l^eutique, 1873). On the other hand, Mr. Cooper Forster had good success after dividing the naevus-tissue subcutaneously and then injecting a "few drops" (Medical Times, 1853, p. 654). Mr. Morgan made an excellent cure of a large erectile tumor of scalp, using circular compression by plaster and pasteboard; and other good results might be adduced, and, with very great care, might, I believe, be still obtained, but by common consent the operation has been discontinued on account of its danger (G. Buchanan: "Lecture," Braithwaite, ii., 1875). A recent Paris thesis, however, re-directs attention to the subject, and presents it in a favorable light (Auguste Rigaud: These, Paris, 1876).
Another and a safer method of using the perchloride in naevus is described by Leclerc, who applied it on pledgets of lint to the part, and obtained a cure at the expense of some erythema and suppuration. Guillot used it after first destroying the epidermis with caustic potash, and Guer-sant after vesication (Bulletin de Therapeutique, t. lxvii.).