endocyst


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endocyst

[′en·də‚sist]
(invertebrate zoology)
The soft layer consisting of ectoderm and mesoderm, lining the ectocyst of bryozoans.
References in periodicals archive ?
Hyaline lamellae with focal scolex representing the membraneous mucoid material on gross description (ectocyst, endocyst and pericyst) (HE, x200); C.
The hydatid cyst stages are a cyst with a visible cyst wall (stage 1), multiseptated, multivesicular cysts (stage 2), a cyst with a detached floating endocyst membrane (stage 3a), a unilocular cyst with solid or mucinous matrix and internal daughter cysts (stage 3b), a heterogeneous solid cyst with a degenerative internal canalicular structure (stage 4), and a degenerated cyst with heavily calcified wall (stage 5) [17].
Incision on the pelvic peritoneum and the cyst wall revealed a white endocyst. Endocystectomy with partial pericystectomy was done without any intraperitoneal spillage and the margins of the pelvic peritoneum and remnant ectocyst sutured.
Total peric./liver resec., 27 (8%) Endocyst and capitonnage, 61 (18%) External drainage, 10 (3%) Endocyst and partial/subtot.
(5) Structurally the cysts consist of a tough outer pericyst that protects a delicate inner endocyst from which brood capsules and daughter cysts develop.
There was a significant collection of eosinophils, plasma cells, macrophages and few neutrophils around the endocyst.
The communicating type consists of a tear of the endocyst with escape of contents via biliary radicles or bronchioles.
Within the pericyst lies the external layer of the cyst itself (ectocyst) and the inner germinative membrane or the endocyst. The cyst is filled with fluid and may contain several daughter cysts.
The outer layer is the pericyst, which consists of compressed liver; inside this is the endocyst, a germinal layer; and inside this is the ectocyst, a thin membrane.