{'fraction_non_alphanumeric': 0.030624263839811542, 'fraction_numerical': 0.01060070671378092, 'mean_word_length': 5.488549618320611, '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}}
Severe intracranial hypertension mimics intracranial hypotension radiologically.

Sir, We report a case of lung cancer in a 55-year-old female who presented with progressive headache since past 3 months. She had vomiting, unsteady gait, and drowsiness since the past month. There was no fever or other neurological deficits. Brain magnetic resonance imaging (MRI) disclosed diffuse dural thickening with vivid contrast enhancement, slit ventricles, and tonsilar herniation [Figure 1], which were typical signs of intracranial hypotension. However, the venous sinuses were irregular and collapsed with an engorged superior ophthalmic vein (SOV) [Figure 2]. Fundoscopy was performed and bilateral papilledema were noticed. Lumbar puncture revealed high opening pressure above 400 mm H 2 O. Diffused bony metastasis with dura involvement was diagnosed.