The same age at the onset of the disease observed in several generations, uniformity of forms, localization of angiomatous growths and a combination of certain anomalies in the development of the skeleton, endocrine system, and internal organs serve as confirmation. The disease is inherited predominantly in an autosomal dominant manner.
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The basis of the pathological process of the Hippel-Lindau disease is the development of Prednisone angiomas of the retina, in the future - the formation of cysts, arteriovenous aneurysms with secondary growth of glia. In the retina, already in the initial period of the disease, turbidity, expansion and tortuosity of blood vessels, mainly capillaries, are found.
Angiomas develop most often in the equatorial part, and primarily in the capillary zone between the arterial and venous trunks. Later, arteries and veins become thickened, tortuous, dilated, growing capillaries form glomeruli of bright red color with a yellow tinge, in which exudate, hemorrhages then appear. The progression of the process leads to retinal detachment (see), optic nerve atrophy (see). Histologically, in the protoplasm of tumor cells between the strands of capillaries, cholesterol is found surrounded by lipid drops (the so-called pseudoxanthoma cells).
Angiomas, angioreticulomas, cystic formations, various anomalies of the ventricles and membranes are found in the brain.