{'fraction_non_alphanumeric': 0.01627906976744186, 'fraction_numerical': 0.004651162790697674, 'mean_word_length': 5.432835820895522, '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 sacrococcygeal teratoma in an adult.

The authors report the case of a 49-year-old man who had a sacrococcygeal teratoma. Computed tomography showed a mass containing calcification. Digital angiography showed hypervascularization of the lesion. Histologic examination of a transrectal biopsy performed during sigmoidoscopy revealed the lesion to be a malignant teratoma which was not resectable or amenable to treatment.