{'fraction_non_alphanumeric': 0.02663115845539281, 'fraction_numerical': 0.009320905459387484, 'mean_word_length': 6.161904761904762, '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}}
Magnetic resonance imaging of leptomeningeal lymphoma

A 74-year-old female with stage IV follicular lymphoma achieved complete remission with anti-CD20 antibody plus chemotherapy. Nine months later, she developed recurrent cervical lymphadenopathy and biopsy showed large cell transformation of follicular lymphoma. The lymphadenopathy resolved after further chemotherapy but she developed sudden onset of confusion. Magnetic resonance imaging showed leptomeningeal enhancement, consistent with lymphomatous involvement of the central nervous system (top, arrowed, Coronal post-Gadolinium image). This was confirmed by lumbar puncture, which showed centroblast-like lymphoma cells immunoreactive for CD20 (bottom). She expired 3 days after admission.