Spleen 5/5: Vascular tumors - hemangioma, lymphangioma, littoral cell angioma, and angiosarcoma скачать в хорошем качестве

Spleen 5/5: Vascular tumors - hemangioma, lymphangioma, littoral cell angioma, and angiosarcoma

Splenic hemangioma Most common benign neoplasm Second commonest focal lesion after splenic cysts Solid mass with cystic spaces, may contain calcifications Peripheral nodular enhancement is less conspicuous Cystic appearance with septal enhancement Growing cystic lesions Solid appearance Solid appearance Splenic lymphangioma Less common than hemangioma, mostly occur in children Microcystic/solid c/s central scar, or large solitary cyst Sharp margin, thin-walled cystic lesion, subcapsular No significant contrast-filling Microcystic lesions may mimic solid lesions Littoral cell angioma Generally considered benign, but may show malignant features Multiple splenic lesions of similar size with hypersplenism US: Mottled exchotexture, either iso/hypo/hyperechoic nodules. CT: Progressive enhancement, become isointense on DP MRI: Hypointense on T1 and T2WI due to hemosiderin Splenic angiosarcoma Very rare, but m.c. non-lymphoid, primary malignant tumor More frequently in older patients Various symptoms, splenomegaly, metastases US: complex mass with heterogeneous texture CT/MRI: Ill-defined, heterogeneous enh, necrosis, hemorrhage Summary: Primary vascular tumor spleen Hemangiomas & lymphangiomas Mixed solid & cystic appearance Hemangioma is more common, better enhancing May not typical as hepatic hemangiomas Littoral cell angioma: Hypersplenism & many, uniform nodules Angiosarcoma Markedly heterogeneous, metastases, hemorrhage, necrosis