BackgroundA mesenteric chylous cyst is defined as a cyst occurring in the mesentery of the gastrointestinal tract anywhere from the duodenum to the rectum and is diagnosed most often during the fifth decade of life.Case presentationIn our case report, we describe a case of 38-year-old Greek woman who presented at our Emergency Department complaining of abdominal pain without any other symptoms. Her medical and family histories were clear and she had never had any abdominal interventions. During an imaging examination with ultrasound of her abdomen, an anechoic lesion in her upper left abdomen was revealed. In a further investigation with computed tomography, a well-defined hypodense cystic 7.08 × 6.05 cm mass with mild enhancement was noted. The mass was excised by open laparotomy within healthy borders and the specimen was sent for pathological examination. The histopathological findings were found to be most consistent with a simple lymphatic (chylous) cyst of the mesentery. A review of the literature considering this rare entity was also performed to evaluate our treatment strategy and the result was analyzed.ConclusionsChylous cysts represent a diagnostic challenge and they should be considered when a physician encounters an intraabdominal mass. Physical examination and imaging do not always provide a diagnosis and surgical management should be advised due to the potential complications that may develop.

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Only very few previously reported cases of pronounced lymphocytic infiltration in parathyroid adenoma can be found in the English medical literature. The objective of this report is to present such a rare case and to investigate to a certain extent the immunohistochemical profile of this rare histologic observation. The lymphoid cell population within the tumour was composed of nodule-forming B-cells and different subsets of infiltrating T-cells and caused minimal destruction of neoplastic tissue.