{'fraction_non_alphanumeric': 0.04143947655398037, 'fraction_numerical': 0.025081788440567066, 'mean_word_length': 5.079470198675497, '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}}
Primary cardiac pleomorphic sarcoma: an aggressive tumor.

• Vol 7 • July 2005 470 Soft tissue sarcoma is the most common malignant neoplasm of the heart, pericardium, and great vessels [1]. Primary cardiac sarcomas have an incidence at autopsy of only 0.0001% [2]. They are the second most common type of primary cardiac tumor, after myxoma [3]. Symptoms are usually the result of tumor invasion or anatomic obstruction of the blood flow, necessitating resection to prevent early death [3]. Historically, the long-term survival of patients with primary cardiac sarcoma has been poor, especially when complete surgical excision is unfeasible [1]. In these instances, median survival is generally 10 months or less [2]. There are no proven benefits of chemotherapy and radiotherapy [1]. A more aggressive approach with transplantation in highly selected patients with primary cardiac sarcomas proved disappointing [4].