Kalyan Mansukhbhai Shekhda, Tu Vinh Luong, Daniel Krell, Shaunak Navalkissoor, Anna Paterson, Martyn Caplin
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引用次数: 0
Abstract
Purpose: Mixed neuroendocrine and non-neuroendocrine neoplasms (MiNENs) are rare neoplasms composed of morphologically distinguishable neuroendocrine (NE) and non-neuroendocrine components, each representing at least 30% of the tumor volume. The NE component must be substantiated by immunohistochemistry. MiNENs generally have a poor prognosis, with a more aggressive component dictating overall survival and prognosis. Owing to its rarity, there are no specific validated treatment guidelines available for these tumors, and they are generally treated with surgery if possible. However, surgically unresectable or advanced tumors are generally treated with chemotherapy.
Methods: We report a case of an elderly woman who was referred to the neuroendocrine tumor (NET) unit following incidental findings of liver lesions found on cardiac magnetic resonance imaging (MRI) performed for an asymptomatic heart murmur. Histology from the liver biopsy revealed MiNEN with up to 60% grade 2 (Ki67: 19%) well-differentiated NET and up to 30% well-differentiated to moderately differentiated adenocarcinoma of possible pancreato-biliary origin; intrahepatic ductal primary could not be excluded. Her 18-fluoro-deoxyglucose positron emission tomography (FDG-PET) revealed no FDG-avid lesions, and a 68Gallium 1,4,7,10-tetraazacyclododecane-tetraacetic acid Tyr3-octreotate (68 Ga-DOTATATE)-PET scan revealed multiple areas of intensely DOTATATE-avid liver lesions. Due to the absence of any primary imaging findings, the patient was diagnosed with MiNEN of possible pancreato-biliary origin.
Results: She was started on lanreotide 120 mg every 28 days for 6 months, with no response to the treatment. Subsequently, the patient was treated with four cycles of 177Lutetium-DOTATATE (Lutathera®) peptide receptor radionuclide therapy (PRRT). She tolerated the treatment well, with no significant side effects. MRI at the end of treatment revealed a partial response to treatment.
Conclusion: PRRT is currently not used in treatment protocols for the management of MiNENs; however, it could be considered a treatment option in patients with MiNENs, where there is a predominant component of well-differentiated NETs with 68 Ga-DOTATATE avid lesions.
期刊介绍：
The Journal of Gastrointestinal Cancer is a multidisciplinary medium for the publication of novel research pertaining to cancers arising from the gastrointestinal tract.The journal is dedicated to the most rapid publication possible.The journal publishes papers in all relevant fields, emphasizing those studies that are helpful in understanding and treating cancers affecting the esophagus, stomach, liver, gallbladder and biliary tree, pancreas, small bowel, large bowel, rectum, and anus. In addition, the Journal of Gastrointestinal Cancer publishes basic and translational scientific information from studies providing insight into the etiology and progression of cancers affecting these organs. New insights are provided from diverse areas of research such as studies exploring pre-neoplastic states, risk factors, epidemiology, genetics, preclinical therapeutics, surgery, radiation therapy, novel medical therapeutics, clinical trials, and outcome studies.In addition to reports of original clinical and experimental studies, the journal also publishes: case reports, state-of-the-art reviews on topics of immediate interest or importance; invited articles analyzing particular areas of pancreatic research and knowledge; perspectives in which critical evaluation and conflicting opinions about current topics may be expressed; meeting highlights that summarize important points presented at recent meetings; abstracts of symposia and conferences; book reviews; hypotheses; Letters to the Editors; and other items of special interest, including:Complex Cases in GI Oncology: This is a new initiative to provide a forum to review and discuss the history and management of complex and involved gastrointestinal oncology cases. The format will be similar to a teaching case conference where a case vignette is presented and is followed by a series of questions and discussion points. A brief reference list supporting the points made in discussion would be expected.
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