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Muñoz de Nova JL, Hernando J, Sampedro Núñez M, Vázquez Benítez GT, Triviño Ibáñez EM, del Olmo García MI, Barriuso J, Capdevila J, Martín-Pérez E. Management of incidentally discovered appendiceal neuroendocrine tumors after an appendicectomy. World J Gastroenterol 2022; 28:1304-1314. [PMID: 35645544 PMCID: PMC9099182 DOI: 10.3748/wjg.v28.i13.1304] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 02/09/2022] [Accepted: 02/23/2022] [Indexed: 02/06/2023] Open
Abstract
Appendiceal neuroendocrine tumors (aNETs) are an uncommon neoplasm that is relatively indolent in most cases. They are typically diagnosed in younger patients than other neuroendocrine tumors and are often an incidental finding after an appendectomy. Although there are numerous clinical practice guidelines on management of aNETs, there is continues to be a dearth of evidence on optimal treatment. Management of these tumors is stratified according to risk of locoregional and distant metastasis. However, there is a lack of consensus regarding tumors that measure 1-2 cm. In these cases, some histopathological features such as size, tumor grade, presence of lymphovascular invasion, or mesoappendix infiltration must also be considered. Computed tomography or magnetic resonance imaging scans are recommended for evaluating the presence of additional disease, except in the case of tumors smaller than 1 cm without additional risk factors. Somatostatin receptor scintigraphy or positron emission tomography with computed tomography should be considered in cases with suspected residual or distant disease. The main point of controversy is the indication for performing a completion right hemicolectomy after an initial appendectomy, based on the risk of lymph node metastases. The main factor considered is tumor size and 2 cm is the most common threshold for indicating a colectomy. Other factors such as mesoappendix infiltration, lymphovascular invasion, or tumor grade may also be considered. On the other hand, potential complications, and decreased quality of life after a hemicolectomy as well as the lack of evidence on benefits in terms of survival must be taken into consideration. In this review, we present data regarding the current indications, outcomes, and benefits of a colectomy.
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Affiliation(s)
- José Luis Muñoz de Nova
- Department of General and Digestive Surgery, Hospital Universitario de La Princesa, Madrid 28006, Spain
- Department of Surgery, Universidad Autónoma de Madrid, Madrid 28029, Spain
| | - Jorge Hernando
- Gastrointestinal and Endocrine Tumor Unit, Medical Oncology Department, Vall d´Hebron University Hospital, Vall d´Hebron Institute of Oncology, Barcelona 08035, Spain
| | - Miguel Sampedro Núñez
- Department of Endocrinology and Nutrition, Hospital Universitario de La Princesa, Madrid 28006, Spain
| | - Greissy Tibisay Vázquez Benítez
- Department of Pathology, Hospital Universitario Puerta de Hierro, Madrid 28222, Spain
- Department of Pathology, Universidad Autónoma de Madrid, Madrid 28029, Spain
| | | | | | - Jorge Barriuso
- Division of Cancer Sciences, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9PL, United Kingdom
- Department of Medical Oncology, The Christie NHS Foundation Trust, Manchester M20 4BX, United Kingdom
| | - Jaume Capdevila
- Gastrointestinal and Endocrine Tumor Unit, Medical Oncology Department, Vall d´Hebron University Hospital, Vall d´Hebron Institute of Oncology, Barcelona 08035, Spain
| | - Elena Martín-Pérez
- Department of General and Digestive Surgery, Hospital Universitario de La Princesa, Madrid 28006, Spain
- Department of Surgery, Universidad Autónoma de Madrid, Madrid 28029, Spain
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Araujo-Castro M, García Centeno R, Robles Lázaro C, Parra Ramírez P, Gracia Gimeno P, Rojas-Marcos PM, Fernández-Ladreda MT, Percovich Hualpa JC, Sampedro Núñez M, López-García MC, Lamas C, Álvarez Escolá C, Calatayud Gutiérrez M, Blanco Carrera C, de Miguel Novoa P, Valdés Gallego N, Hanzu F, Marazuela M, Mora Porta M, Mínguez Ojeda C, García Gómez Muriel I, Escobar-Morreale HF, Valderrabano P. Predictive model of pheochromocytoma based on the imaging features of the adrenal tumours. Sci Rep 2022; 12:2671. [PMID: 35177692 PMCID: PMC8854552 DOI: 10.1038/s41598-022-06655-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 02/03/2022] [Indexed: 12/18/2022] Open
Abstract
The purpose of our study was to develop a predictive model to rule out pheochromocytoma among adrenal tumours, based on unenhanced computed tomography (CT) and/or magnetic resonance imaging (MRI) features. We performed a retrospective multicentre study of 1131 patients presenting with adrenal lesions including 163 subjects with histological confirmation of pheochromocytoma (PHEO), and 968 patients showing no clinical suspicion of pheochromocytoma in whom plasma and/or urinary metanephrines and/or catecholamines were within reference ranges (non-PHEO). We found that tumour size was significantly larger in PHEO than non-PHEO lesions (44.3 ± 33.2 versus 20.6 ± 9.2 mm respectively; P < 0.001). Mean unenhanced CT attenuation was higher in PHEO (52.4 ± 43.1 versus 4.7 ± 17.9HU; P < 0.001). High lipid content in CT was more frequent among non-PHEO (83.6% versus 3.8% respectively; P < 0.001); and this feature alone had 83.6% sensitivity and 96.2% specificity to rule out pheochromocytoma with an area under the receiver operating characteristics curve (AUC-ROC) of 0.899. The combination of high lipid content and tumour size improved the diagnostic accuracy (AUC-ROC 0.961, sensitivity 88.1% and specificity 92.3%). The probability of having a pheochromocytoma was 0.1% for adrenal lesions smaller than 20 mm showing high lipid content in CT. Ninety percent of non-PHEO presented loss of signal in the “out of phase” MRI sequence compared to 39.0% of PHEO (P < 0.001), but the specificity of this feature for the diagnosis of non-PHEO lesions low. In conclusion, our study suggests that sparing biochemical screening for pheochromocytoma might be reasonable in patients with adrenal lesions smaller than 20 mm showing high lipid content in the CT scan, if there are no typical signs and symptoms of pheochromocytoma.
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Affiliation(s)
- Marta Araujo-Castro
- Department of Endocrinology & Nutrition, Hospital Universitario Ramón y Cajal, Instituto de Investigación Biomédica Ramón y Cajal (IRYCIS), Universidad de Alcalá, Madrid, Spain.
| | - Rogelio García Centeno
- Department of Endocrinology & Nutrition, Hospital Universitario Gregorio Marañón, Madrid, Spain
| | - Cristina Robles Lázaro
- Department of Endocrinology & Nutrition, Hospital Universitario Virgen de La Concha, Zamora, Spain
| | - Paola Parra Ramírez
- Department of Endocrinology & Nutrition, Hospital Universitario La Paz, Madrid, Spain
| | - Paola Gracia Gimeno
- Department of Endocrinology & Nutrition, Hospital Universitario Rollo Villanova, Zaragoza, Spain
| | | | | | | | - Miguel Sampedro Núñez
- Department of Endocrinology & Nutrition, Hospital Universitario La Princesa, Madrid, Spain
| | - María-Carmen López-García
- Department of Endocrinology & Nutrition, Complejo Hospitalario Universitario de Albacete, Albacete, Spain
| | - Cristina Lamas
- Department of Endocrinology & Nutrition, Complejo Hospitalario Universitario de Albacete, Albacete, Spain
| | | | | | | | - Paz de Miguel Novoa
- Department of Endocrinology & Nutrition, Hospital Universitario Clínico San Carlos, Madrid, Spain
| | - Nuria Valdés Gallego
- Department of Endocrinology & Nutrition, Hospital Universitario de Cabueñes, Asturias, Spain
| | - Felicia Hanzu
- Department of Endocrinology & Nutrition, Hospital Clinic, Barcelona, Spain
| | - Mónica Marazuela
- Department of Endocrinology & Nutrition, Hospital Universitario La Princesa, Madrid, Spain
| | - Mireia Mora Porta
- Department of Endocrinology & Nutrition, Hospital Clinic, Barcelona, Spain
| | | | | | - Héctor F Escobar-Morreale
- Department of Endocrinology & Nutrition, Hospital Universitario Ramón y Cajal, Instituto de Investigación Biomédica Ramón y Cajal (IRYCIS), Universidad de Alcalá, Madrid, Spain
| | - Pablo Valderrabano
- Department of Endocrinology & Nutrition, Hospital Universitario Ramón y Cajal, Instituto de Investigación Biomédica Ramón y Cajal (IRYCIS), Universidad de Alcalá, Madrid, Spain.
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