endothelial cyst

en·do·the·li·al cyst

a serous cyst whose sac is lined with endothelium.
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Results of Histopathologic Examination of Adrenal Lesions Adenoma Non-functioning benign adenoma 19 Aldosterone secreting adenoma (Conn's Syndrome) 02 Phaeochromocytoma 04 Adrenocortical carcinoma 03 Cysts Epithelial cyst 02 Endothelial cyst 03 Pseudocyst 06 Parasitic cyst 01
endothelial cysts (most common), 45%; epithelial cysts, 9%; pseudocyst/haemorrhagic, 39% and parasitic cysts, 7%.
In this particular case, the adrenal cystic mass could have resulted from (1) the parasitic infection itself affecting a normal gland, (2) secondary cystic degeneration of an infected adenoma, or (3) infection of a primary endothelial cyst.
CT demonstration of a giant adrenal endothelial cyst of the angiomatous subtype.
1-6 Histologically, adrenal cysts have been classified into four groups: 1- Pseudocysts (39%) 2-Parasitic cysts (7%) 3- Epithelial cysts (9%) 4- Endothelial cysts (45%), the latter are subdivided into angiomatous and lymphangiomatous cysts.
Endothelial cysts are the most common pathologic subtype of adrenal cyst, accounting for approximately 40% of adrenal cysts.
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