{'fraction_non_alphanumeric': 0.019736842105263157, 'fraction_numerical': 0.0021929824561403508, 'mean_word_length': 5.347222222222222, '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}}
Meningiomas in childhood and adolescence.

Meningiomas are rare tumors of childhood and adolescence but one should always consider them when making a differential diagnosis. Seventy-five patients in this age group were reviewed, including 7 of our own. Several features differing from those of adulthood meningiomas are described. Some of the tumors may have unusual growth patterns, such as cyst formation, resulting in confusing angiographic appearances.