{'fraction_non_alphanumeric': 0.02478134110787172, 'fraction_numerical': 0.008017492711370262, 'mean_word_length': 5.600961538461538, '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': 1, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
A Case of Pneumatosis Cystoides Intestinalis Associated with Trichlor‐oethylene Developing Typical Features during the Follow‐up of Undetermined Sigmoid Lesions

Abstract: A 64‐year‐old male lens grinder with a 43‐year history of occupational exposure to trichloroethylene (TCE) visited Shinshu University Hospital in December 1988 complaining of distention of the lower abdomen. A barium enema study and endoscopic examination showed rosary‐like semilunar folds and edematous mucosa of undetermined etiology in the sigmoid colon. Three months later, the patient visited the hospital again complaining of blood in the stool. An endoscopic examination performed at this time revealed numerous broad‐based, smooth‐surfaced, protruding lesions in the sigmoid colon. A diagnosis of pneumatosis cystoides intestinalis (PCI) associated with TCE was made. After 4‐days treatment with 50% oxygen given by inhalation, the patient's symptoms were completely relieved, and a colonoscopy revealed no evidence of PCI. He returned to his job at the factory which involved dealing with TCE and because of adequate ventilation and a shorter work‐day he has been free of recurrence during a year follow‐up period. The finding of rosary‐like semilunar folds, as demonstrated by the initial endoscopic and barium enema studies in our patient, is a peculiar one in the incipient stage of PCI.