横隔膜上に発生した多発リンパ管嚢胞の1例

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  • A case of multiple lymphocysts on the diaphragm

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We report a case we encountered concerning the occurrence of multiple lymphocysts on the diaphragm. The case was a 45-year-old female. She was receiving outpatient treatment for chronic articular rheumatism. In 2010, during a physical examination, kidney cysts were noted on the left side, and, in a precision CT examination, a shadow of multiple tumor masses with a maximum diameter of 3 cm was noted on the right diaphragm. In a follow-up CT one year later, enlargement of the shadow was observed, and surgery was performed. The tumor masses were five cystic lesions with consecutive capsules that were pedunculated from the diaphragm pleura, and, internally, they contained a white suspension believed to be a chyle constituent and a white substance that appeared to be necrosed. The tumor masses were excised under a thoracoscope. Moreover, a small amount of chyle pleural effusion was observed. Histologically, cyst walls were lined with lymphatic endothelial cells that were positive on D2-40 immunostaining, leading to a diagnosis of multiple lymphocysts occurring in the subserosa of the diaphragm pleura.

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