Chronic essential (primary) fibrinous bronchitis, croupous bronchitis or bronchitis pseudomembranacea is a rare affection. Its rarity is commented on by every observer of the disease, and is sustained by the small number of cases reported, no observer having seen more than one or two cases.
Birmer1, who wrote the first extensive monograph on the subject in 1855, says: "Bronchitis crouposa is a very rare affection." Galen2 observed a case of bronchitis fibrinosa, though he erroneously described the bronchial cast which he saw as a coughed up pulmonary blood-vessel. Tulpius3 in 1641, presented the first reliable report on fibrinous bronchitis. He described the fibrinous exudate as surculi venœ arteriosœ expectorati, and illustrated his report by two drawings which do not leave any doubt as to the nature of the affection. Morgagni,4 in 1760, described fibrinous bronchitis.
Birmer (loc. cit.) gives an elaborate description of fibrinous bronchitis based
PATTON JM, HEFZOG M. A CASE OF FIBRINOUS BRONCHITIS. JAMA. 1898;XXX(1):25–27. doi:10.1001/jama.1898.72440530025002i
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