Diseases of the Ovaries and the Fallopian Tubes.
Among the conditions which, although the maturation of the ovum proceeds normally to a conclusion, may prevent conjugation between the male and female elements, we must in the first place consider an abnormal condition of the tunica albuginea of the ovary, a thickening of this membrane in consequence of inflammatory processes or of new formation of connective tissue, whereby the dehiscence of the follicle is rendered difficult or entirely prevented. Such thickenings of the ovarian envelope are the residue of perioophoritic processes.
Such a hindrance to conception may be permanent or transient, and thus the sterility dependent thereupon may be relative or absolute. Similar is the effect of inflammatory processes affecting the peritoneal investment of the uterus, the broad ligaments, and the peritoneum clothing the floor of the pelvis; these conditions, perimetritis, perisalpingitis, and pelvic peritonitis, resulting in the formation of thick and extensive pseudomembranous bands, or in less severe cases leaving merely slight adhesions and filaments, which drag the uterus and the ovaries out of place, and thus render conception difficult or impossible.
Perimetritic adhesions are apt to lead to dislocation of the tubes either forwards or backwards, and most commonly into the pouch of Douglas, thus giving rise to sterility. Rokitansky and Virchow already insisted on the great importance of perimetritic processes in causing sterility.
That congenital defects of the Fallopian tubes may lead to sterility, is indeed a possible, but certainly a rare occurrence. The defect may be unilateral or bilateral; or it may be that merely a portion of one tube may be wanting. Bilateral absence of the Fallopian tubes is usually associated with defective development of the uterus, while the ovaries may be apparently normal. Such a case is described by Foerster and Kussmaul. The vagina opened into the urethra, the uterus was not calibrated, and diverged above into two solid horns, to which the round ligaments and the ovaries were attached. A congenital cause of sterility is to be found also in atresia of the tubes, the abdominal extremities of which are closed; this condition is met with also in other mammals. It is also assumed, with less accuracy, that a supernumerary ostium tubae may lead to sterility, in consequence of the ovum, which has found its way into the normal ostium, returning into the abdominal cavity through the supernumerary orifice. An unfavourable influence upon fertility is exercised also by a form of hyperplasia of the tubes which sometimes arises in consequence of erroneous development at the time of puberty; the tubes, increasing unduly in length, become serpentine in form instead of being nearly straight; this tends to lead to accumulation of the secretions, and renders the passage of the ovum difficult. (Freund.) Yet another defect of development which, as Klebs has pointed out, may lead to sterility, is absence of the fimbria which normally retains the abdominal orifice of the Fallopian tube in proximity with the ovary, in which case these structures may be separated by a wide interval.
The entry of the ovum into the tube may thus be rendered difficult by abnormalities of the abdominal orifice of the tube or of the fimbriae; but still more is this the case when the mucous membrane of the tube is diseased. The fringed border of the tubal orifice has a distinct tendency to independent disease. As Klebs’s anatomicopathological studies have shown, inflammatory changes are common in this region, leading to contraction. The free margin of the tube then appears to be strictured by overgrowth of fibrous tissue on the serous surface, the opening being thus narrowed or even entirely closed, whilst the fimbriae themselves may be drawn within the aperture. In other cases, the ring of fimbriae is adherent to some neighbouring part, especially to the ovary itself, when this also is diseased. Further, on the fringed margin of the tube we see papillary growths, telangiectases, or oedema with formation of cystic cavities.
In the interior of the tubes also, pathological processes occur, catarrhal inflammations, haemorrhagic or purulent exudations, sealing up the passage completely. In some cases these exudations lead to great distension and even to rupture of the tube. Thus, among the causes of sterility must be enumerated: simple catarrh of the tube, with swelling of the mucous membrane; purulent catarrh, leading to its distension with pus—pyosalpinx; serous effusion into the tube, hydrosalpinx; and haemorrhagic effusion, haematosalpinx; further, that peculiar form of tubal inflammation, described by Chiari and Schauta under the name of salpingitis isthmica nodosa, in which hyperplasia of the muscular coat of the tube occurs at irregular intervals, so that it appears to be beset with nodes. Special mention must also be made of gonorrhoeal salpingitis, which will subsequently be described in detail.
Inflammatory states of the tube may hinder conception, either mechanically, by swelling of the mucous membrane, or by obstruction of the lumen of the tube by exudations, by injury or destruction of the ciliated epithelium, by lesion of the musculature of the tube, affecting its peristaltic movements—all these hindering or entirely preventing the passage of the ovum downwards or of the spermatozoa upwards; or, again, chemically, by the deleterious influence of many of the morbid secretions that are formed in these conditions upon the vitality of ova or spermatozoa. These inflammatory states of the tubes may also lead to stricture or obliteration of their abdominal extremities, or to displacement of the ostia, and thus lead to sterility; in other cases these same conditions, leading to distortion and displacement of the tube, may prevent the downward passage of the ovum while leaving possible the upward passage of the spermatozoa, and thus give rise to tubal gestation—a condition which we shall not now consider.
It must not be forgotten that tuberculosis of the genital canal attacks the tubes with especial frequency; in these organs we may find miliary tubercles, and more commonly diffuse caseous masses, completely filling the lumen of the canal. Finally we have to mention the diverse forms of saccular dilatation of the tubes (Ger. “Tubensäcke”), all of which possess the common pathological characteristics of enlargement of the tubes and their conversion into saccular cavities; the contents of these distended tubes may, however, be extremely various, and such conditions may depend upon manifold mechanical disturbances and inflammatory processes of the uterus and its annexa.
When we consider how common, during the sexual life of women, are perioophoritic inflammations, more or less intense, but often without severe symptoms (and hence apt to be overlooked); when we remember that the very process of ovulation and also the puerperal state furnish opportunities for slight or severe pelvic peritonitis to arise; and when we further take into account the frequency and importance of gonorrhoeal pelvic peritonitis—we cannot fail to admit that the results of these morbid conditions, such as adhesions between the ovary and the ostium tubae, or closure of the tube with consequent hydro- or pyosalpinx, must be reckoned among the principal causes of sterility. If the frequency and importance of these conditions is still underestimated, two reasons can be adduced for this: first, that the slighter degrees of intrapelvic inflammation often, as previously mentioned, elude diagnosis; and, secondly, that even when the treatment is expectant merely, the exudations are frequently absorbed, the adhesions give way, and the capacity for conception is gradually fully restored.