{'fraction_non_alphanumeric': 0.00989010989010989, 'fraction_numerical': 0.0, 'mean_word_length': 6.1171875, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
CT appearance of angiosarcoma associated with chronic lymphedema.

Angiosarcoma is an uncommon, rapidly progressive neoplasm of the vascular endothelium that may be associated with chronic lymphostatic lymphedema of the extremities. Although it is seen more frequently in lymphedema of the upper extremities after mastectomy for breast carcinoma, it is also associated with idiopathic or congenital Iymphedema. This case illustrates the classic clinical course of angiosarcoma associated with idiopathic lymphedema and the previously undescribed CT appearance of lymphedema complicated by diffuse infiltrating angiosarcoma involving the entire right lower extremity. The extreme skin thickening, frequently nodular, with marked fibrous septal thickening and lakes of encapsulated fluid surrounding and directly involving muscle groups differs from the less marked honeycomb pattern typical of lymphedema on CT.