Arterial elastorrhexis: manifestation of a generalized elastic tissue disorder in beta-thalassaemia major

Pseudoxanthoma elasticum-like lesions of the eye and skin are frequently ob served in beta-thalassaemia, and there has been speculation about associate d vascular lesions. This led to our study of histopathological material fro m thalassaemic patients. Histological re-examination was made of a series of 45 spleens and 45 surgi cal liver biopsies from 45 patients with beta-thalassaemia major, aged 6-25 yr and treated over the 20-yr period 1975-95. Correlations between clinica l, laboratory and histological findings were demonstrated by statistical an alysis. Arteriopathy characterized by fragmentation and multiple defects of the int ernal elastic lamina ('arterial elastorrhexis'), with deposits of iron and calcium salts, was found in the hilar arteries of the spleen with a frequen cy of 96%. Similar lesions were observed in the parenchymal arteries and th e stromal elastic tissue ('stromal elastorrhexis') of the spleen, liver and lymph nodes. Arterial and elastic tissue alterations appear in the first d ecade of life and become generalized over the course of the disease, indepe ndent of the time of onset of transfusion and iron chelation therapy. Arterial elastorrhexis is the earliest and most frequent manifestation of a systemic elastic tissue disorder in beta-thalassaemia major. It appears to be an acquired pseudoxanthoma elasticum-like syndrome, related primarily t o tissue hypoxia and disturbance of elastin metabolism.