{'fraction_non_alphanumeric': 0.03634085213032581, 'fraction_numerical': 0.020050125313283207, 'mean_word_length': 4.256578947368421, '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}}
Effect of lung volume and gravity on the attenuation and size of a pure ground-glass nodule.

Detecting potentially malignant changes in a pure ground-glass nodule (GGN) is challenging. The development of a solid component is a known sign, which may help in differentiating benign from malignant GGN. We report the case of a 58-year-old man presenting with a pure GGN in the posterior segment of the right lower lobe. Follow-up computed tomographic scan after 1 year showed marked increase in attenuation (from -319 HU to +27 HU), whereas the average size of the nodule decreased (from 7 to 4.7 mm). On a computed tomographic scan in the prone position the nodule seemed larger (7.8 mm) and appeared as a pure GGN (-406 HU). Such changes were attributed to the reduction of lung volume and gravity.