Gynecological diagnosis and pathology . Plate VIII.), sometimes imbedded in bone. Muscle, mammaryand thyroid gland substance, cartilage, intestine, may all be present inthe wall of such cysts. Usually when such a variety of structure ispresent the tumour is solid and is known as a teratoma. 166 GYNECOLOGICAL PATHOLOGY The origin of those tumours has given rise to much speculation. Themost likely theory is that they arise by a process of parthenogenesis;that is, that they develop from an unfertilised primordial ovum. SOLID OVARIAN TUMOURS. Fibroma.—This rare tumour arises from the connective-ti
Gynecological diagnosis and pathology . Plate VIII.), sometimes imbedded in bone. Muscle, mammaryand thyroid gland substance, cartilage, intestine, may all be present inthe wall of such cysts. Usually when such a variety of structure ispresent the tumour is solid and is known as a teratoma. 166 GYNECOLOGICAL PATHOLOGY The origin of those tumours has given rise to much speculation. Themost likely theory is that they arise by a process of parthenogenesis;that is, that they develop from an unfertilised primordial ovum. SOLID OVARIAN TUMOURS. Fibroma.—This rare tumour arises from the connective-tissue stromaof the ovary. It is unilateral or bilateral and varies in size from a peato a foetal head. It arises as a localised nodule springing from one poleor surface of the ovary, or has a more diffuse origin so that it expandsthe ovary equally in all directions, leaving only a thin shell of ovariansubstance on the surface. Such a tumour usually retains the shape ofthe ovary, and the surface has a lobulated or convoluted appearance. Fig. 163.—Fibboma of the Ovaby. Note the irregularly lobulated character of the surface. The ovarian tissue is below. (fig. 163). There is a distinct pedicle. On section the tumour is hardand non-vascular. Microscopically, it is composed for the most part offibrous tissue with a small quantity of non-striped muscle. A fibromasometimes springs from the utero-ovarian ligament, and usually containsa small amount of non-striped muscle fibre. Ovarian fibroids frequentlyundergo torsion of the pedicle and then give rise to ascites. They mayundergo various forms of degeneration, especially mucoid and myxomatous. Sarcoma.—This usually forms a solid tumour which, however, is ofsoft consistence. To the naked eye such tumours have much the sameappearance as fibroma but are of more rapid growth, are always associatedwith ascites, and may arise at quite an early age. They may be of theround-celled, mixed-celled or spindle-celled variety. Under this head w
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectgynecology, bookyear1
