{'fraction_non_alphanumeric': 0.020537124802527645, 'fraction_numerical': 0.02527646129541864, 'mean_word_length': 5.34, '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}}
Malignant fibrous histiocytoma of the heart presenting as an atrial myxoma

A 37‐year‐old woman presented with signs and symptoms suggestive of mitral stenosis and insufficiency. Subsequent evaluation demonstrated a left atrial tumor which was suspected clinically and at the time of initial surgery to be an atrial myxoma. Histologic examination revealed that the tumor was actually a malignant fibrous histiocytoma. Despite near total removal at surgery and subsequent radiotherapy, the tumor recurred within six months in the left atrium. Re‐excision was followed by a third recurrence in the same site. Cancer 42:2466–2471, 1978.