{'fraction_non_alphanumeric': 0.019550342130987292, 'fraction_numerical': 0.002932551319648094, 'mean_word_length': 5.131736526946108, '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}}
A rare case of Erdheim-Chester disease.

We report a case of a 74-year-old gentleman who presented with a 2-week history of exertional chest pain and shortness of breath. His background history was significant for renal artery stenosis, hypertension and renovascular disease. There were no new changes on electrocardiograph or significant troponin rise. Relevant initial investigations included a chest X-ray, which showed a moderate loculated right-basal pleural effusion. A subsequent CT thorax confirmed bilateral chest loculated effusions, and presence of soft tissue thickening around the thoracic aorta and subcapsular low attenuation soft tissue material around the left kidney. In view of these findings, a right pleural drain was inserted and he proceeded to have a left perinephric soft tissue biopsy. The pleural fluid was exudative as per Light's criteria and no malignant cells were identified. Interpretation of radiology findings as well as perinephric biopsy results were consistent with a diagnosis of ECD.