Spleen 2/5: Cystic lesions скачать в хорошем качестве

Spleen 2/5: Cystic lesions

Splenic cysts True (epithelial) cyst Congenital: Squamous, transitional, mesothelial epithelium Neoplastic (endothelial): Hemangioma, lymphangioma Parasitic: usually caused by Echinococus granulosus False cyst (pseudocyst): Epithelial lining (-) Epithelial (true/primary) Cysts ~ 20%, children & young adults, female predilection Large (~10 cm), solitary 80%, uncommon calcification (10-15%) Mesothelial invagination, lymph space, endodermal inclusion Serous fluid, heavily trabeculated inner wall Often symptomatic and require splenectomy Mesothelial cyst Thinner and smooth wall No calcification or septation Clear fluid Pseudocysts (false/secondary cysts) ~80%, solitary & asymptomatic Trauma, infarction, inflammation, destroyed lining of true cysts Fibrous wall, calcification may present Filled with blood and necrotic debris Summary: Non-parasitic splenic cysts Almost always benign Differentiation of true and pseudocyst is difficult Mesothelial-lining epithelial cyst Thin smooth wall; No septation/calcification/hemorrhage Prominent trabeculation on gross specimen Epithelial cyst: 20%, young, septation or trabeculation Pseudocyst: 80%, older, calcification, heterogeneous fluid