ectocyst


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ectocyst

[′ek·tə‚sist]
(invertebrate zoology)
The outer layer of the wall of a zooecium.
(invertebrate zoology)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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[2] A preliminary diagnosis by cytology or FNAC (fine needle aspiration cytology) may not always be helpful, as thick mucin aspirated with scanty cellularity may simulate laminated membrane of hydatid cyst and easily misdiagnosed as ectocyst of hydatid disease.
Hyaline lamellae with focal scolex representing the membraneous mucoid material on gross description (ectocyst, endocyst and pericyst) (HE, x200); C.
A computed tomography scan of the chest was performed, which confirmed a ruptured hydatid cyst with the ectocyst lying collapsed within the pericyst.
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.
As soon as the cyst was punctured the patient developed chills and rigor and fever intensified and real time Ultrasound showed typical picture of hydatid cyst with "Water lily sign" with the endocyst floating free in the ectocyst (Figure 2).