The enumeration of possible causes might be indefinitely prolonged. Scanzoni's classical monograph on chronic metritis contains a much larger number. As remarked by Fritsch,14 "In the elastic bands of his conception of the disease every catarrh, every affection of the uterus, fitted finally snugly into place." The more common efficient causes have been indicated.
14 Op. cit., p. 299.
PATHOLOGICAL ANATOMY.—Modern pathological doctrines on chronic metritis are largely modifications of the opinions so ably advocated by Scanzoni15 in 1863. Scanzoni, while fully recognizing the various forms of chronic uterine infarct, simplified the study of the subject by comprehending them all under two stages: I. the stage of infiltration; II. the stage of induration.
15 Die Chronische Metritis, Wien, 1863.
I. In the first stage the uterine tissue is infiltrated with serum, blood, and fibrin (serös-blutige, serös-faserstoffige Infiltration). The organ is in a state of engorgement oedema, the consequence of active and passive hyperæmia. It is enlarged in volume, altered in shape, reddened and more or less sensitive on pressure, soft and doughy to the sense of touch. The uterus may remain in this condition, or, after a longer or shorter interval, pass over into the stage of induration. Long-continued venous hyperæmia leads with comparative infrequency to induration, although intercurrent inflammations, exudations, and new formations of tissue may produce that effect. This stage cannot be invariably viewed as of an inflammatory character. These enlargements of the uterus are frequently examples of the nutritive disturbances commonly observed in other organs in consequence of long-continued venous hyperæmia. The close correspondence of Scanzoni's stage of infiltration with Emmet's congestive hypertrophy is at once apparent.
II. In the stage of induration a luxuriant growth of connective tissue replaces the specific tissue-elements which are destroyed by a chronic inflammatory process. Early in this stage there may be an actual increase in size of the individual muscular elements. Ultimately, the hypertrophy disappears, the soft and succulent connective tissue becomes fibrillated, and the vessels are narrowed, sometimes obliterated, by its contraction. The uterus, though still enlarged and altered in shape, is of a pale color, anæmic, dry, tough, and hard. Ultimately, the uterus is reduced in size by the cicatricial contraction of the firm, fibrillar connective tissue. On section the tissue is white, of cartilaginous consistence, and the knife creaks as it divides the structures. Scanzoni's stage of induration is thus nearly identical with the areolar hyperplasia, diffuse interstitial hypertrophy, sclerosis uteri, of Thomas and Skene.
Klob16 a pupil of Rokitansky's, attributes the hyperplasia of connective tissue to nutritive disturbances, considers the terms chronic metritis and chronic infarct anatomically incorrect, and classes the condition among the new formations. Carl Braun17 and Wedl in 1864 assumed the same position.
16 Jul. M. Klob, Pathologische Anatomie d. Weibl. Sexualorgane, Wien, 1864.
17 Lehrbuch d. g. Gynaekologie, Wien, 1881, p. 351.