The Vesicles And Granulated Spheres, the incrustations, the areolar tissue developments and the fat-globules, render the contents of the vascular plexus-cyst more or less opaque.

y. Finally, we have, in the well-founded expectation of throwing additional light upon cyst-development, examined their fluid contents. For this purpose we have found the contents of small (young) cysts, those, for example, which occur upon the broad ligaments of the womb, or within the cortical substance of the kidney, especially serviceable. They include a multiplicity of elementary forms, essentially identical with what are observed in the vascular plexus cyst. Nor is their occurrence limited to the cyst itself.

The fluid, semi-fluid contents of the sac, consist in an albumen-holding humor, which possibly presents various phases, the chief one being, however, that in which it constitutes colloid. In it are contained those elementary forms which are here fraught with peculiar interest. It is here adverted to irrespectively of what was before stated concerning its parenchymatous contents, as well as of whatsoever changes hemorrhage or exudation may give rise to within the cyst.

Besides the debris of an epithelial layer generally composed of granulated, nucleolated nuclei, there are found:

(a.) Similar free nuclei, some holding two, three, or four nucleoli, some visibly exceeding the usual size of nuclei. Along with them here and there, a form of which it is problematic whether it be a nucleated cell, or a full-grown nucleus, with a nucleolus.

(b.) Granules, the larger of which being 1/100th of a millimetre in diameter, are obviously vesicles.

(c.) To both are associated vesicles and cysts, which grow from the size of the aforesaid granules to 1/26th millimetre, and as will be seen, beyond this.

These cysts offer many points of interest:

(a.) They are simple, or else compound, incased within and within. As regards the latter, we meet in the first place with simple vesicles, within which a central granule or nucleus-corpuscle has become developed. This progressively enlarges into a cyst, in which the same process may be repeated. In a cyst are often contained two, three, four, and more secondary granules, nuclei, vesicles, in which the process of ingeneration is still further repeated.

(B.) Their shape is commonly spherical, but often flattened by mutual compression. Some, owing perhaps to the inspissation of their contents are wrinkled, bent inwards, more or less regularly indented. This applies to the simple cyst equally with the compound, affecting in the case of the latter all the involved cysts in various degrees, or it may be only one, and that the innermost.

Some frequently throw out various projections, prolonged into cylindrical processes, which in turn display ulterior promontories, or it may be inlets. This applies both to the simple cyst, and also to the compound, affecting all the layers in unison. Occasionally, the projections are obviously determined by endogenous development out of multiplex nuclei and vesicles.

7. Their contents present marked differences: