Divested Nuclei, which, like the cell-included nucleus (cell-nucleus), expand into larger, transparent, structureless vesicles. These -

(a.) Remain sterile cysts.

(b.) They give birth to numerous secondary nuclei, until the cyst is replete with these. Such cysts often entirely resemble the gland-cyst of the thyroid and supra-renal glands. Of these secondary nuclei, one or more occasionally grow into a vesicle, which remains sterile, or fills with brood-nuclei, or presents phenomena about to be described.

(c.) A central nucleus-corpuscle appears in the vesicle and expands into a secondary nucleus. - This nucleus, like the primitive one, dilates into a vesicle in which a nucleus formation of the third order takes place.

Out of the frequent repetition of this process originate growths concentrically laminated, or consisting of a series of endogenous vesicles, which here again are distinguished by their proclivity to incrustation. Sometimes there are developed, in one of the secondary vesicles, more than a single nucleus - for example, two out of each, out of one only of which a laminated formation may become developed. In the latter case, ordinary brood-nuclei are generated in the other. The inner vesicle either remains sterile, or a central nucleus, or it may be several nuclei, engross its space. Here, again, there may be laminated structures, springing from extra-centrical nuclei.

All these structures are lodged within a parenchyma (differing in composition, and in the fecundity of its elements), of nuclei, cells, caudate-cells, fibres. These elements are so arranged as to inclose the said structures in a capsular fashion, the cells, and even the nuclei, lengthening into riband-like, caudate cells, and oblong nuclei, with a corresponding incurvation. (Alveolar textural arrangement).

Still, the main condition for the growth of the vesicle is the presence of encircling fibres, and their appropriation to the fabric of a resisting fibrous cyst.

The simultaneous evolution of the brood-nuclei of the vesicle causes the cyst to become speedily furnished with a proper parenchyma corresponding with that which surrounds the cyst. In this a filial cyst may become developed.