Maxime Ronot1, Francesco Cuccioli2, Marco Dioguardi Burgio2, Marie-Pierre Vullierme2, Olivia Hentic3, Philippe Ruszniewski4, Gaspard d'Assignies2, Valérie Vilgrain5. 1. Department of Radiology, University Hospitals Paris Nord Val de Seine, Beaujon, Clichy, Hauts-de-Seine, France; University Paris Diderot, Sorbonne Paris Cité, Paris, France; INSERM U1149, centre de recherche biomédicale Bichat-Beaujon, CRB3, Paris, France. Electronic address: maxime.ronot@aphp.fr. 2. Department of Radiology, University Hospitals Paris Nord Val de Seine, Beaujon, Clichy, Hauts-de-Seine, France. 3. Department of Pancreatology, University Hospitals Paris Nord Val de Seine, Beaujon, Clichy, Hauts-de-Seine, France. 4. University Paris Diderot, Sorbonne Paris Cité, Paris, France; Department of Pancreatology, University Hospitals Paris Nord Val de Seine, Beaujon, Clichy, Hauts-de-Seine, France. 5. Department of Radiology, University Hospitals Paris Nord Val de Seine, Beaujon, Clichy, Hauts-de-Seine, France; University Paris Diderot, Sorbonne Paris Cité, Paris, France; INSERM U1149, centre de recherche biomédicale Bichat-Beaujon, CRB3, Paris, France.
Abstract
PURPOSE: To re-evaluate and compare CT features of neuroendocrine liver metastases (NLM) from pancreatic (p) and enteric (e) gastroenteropancreatic (GEP) tumours. MATERIAL AND METHODS: From 2006-2013, all patients with proven GEP-neuroendocrine tumours (NETs) with at least one NLM, no previous treatment were included. On unenhanced, arterial and portal phases, NLMs were characterized as hypo-, iso- or hyperattenuating in consensus by 2 radiologists blinded to clinical data. Enhancement patterns (EP) corresponded to the combination of arterial/portal CT attenuation. RESULTS: 78 patients (43 men, 55%, mean 56±13 yo) and 559NLMs were analyzed. pNLMs were more frequently hypoattenuating on unenhanced CT than eNLMs (72% vs. 57%, p<0.001). 70% of the lesions were hypervascular with no significant difference between pNLMs and eNLMs (p=0.32). eNLMs were more frequently hypoattenuating on portal phase than pNLMs (88% vs. 56%, p<0.001). eNLMs were more frequently hyper/hypo than pNLMs (56% vs. 28%, p<0.001). pNLMs were more frequently hyper/iso than eNLMs (33% vs. 8%, p<0.001). Other NLMs showed various patterns, including hypo/hypo in 12%. CONCLUSION: Most NLMs of GEP tumours are hypervascular but the enhancement pattern on multiphasic CT depends on the primary tumour. These differences are helpful when the primary tumour has not been diagnosed.
PURPOSE: To re-evaluate and compare CT features of neuroendocrine liver metastases (NLM) from pancreatic (p) and enteric (e) gastroenteropancreatic (GEP) tumours. MATERIAL AND METHODS: From 2006-2013, all patients with proven GEP-neuroendocrine tumours (NETs) with at least one NLM, no previous treatment were included. On unenhanced, arterial and portal phases, NLMs were characterized as hypo-, iso- or hyperattenuating in consensus by 2 radiologists blinded to clinical data. Enhancement patterns (EP) corresponded to the combination of arterial/portal CT attenuation. RESULTS: 78 patients (43 men, 55%, mean 56±13 yo) and 559NLMs were analyzed. pNLMs were more frequently hypoattenuating on unenhanced CT than eNLMs (72% vs. 57%, p<0.001). 70% of the lesions were hypervascular with no significant difference between pNLMs and eNLMs (p=0.32). eNLMs were more frequently hypoattenuating on portal phase than pNLMs (88% vs. 56%, p<0.001). eNLMs were more frequently hyper/hypo than pNLMs (56% vs. 28%, p<0.001). pNLMs were more frequently hyper/iso than eNLMs (33% vs. 8%, p<0.001). Other NLMs showed various patterns, including hypo/hypo in 12%. CONCLUSION: Most NLMs of GEP tumours are hypervascular but the enhancement pattern on multiphasic CT depends on the primary tumour. These differences are helpful when the primary tumour has not been diagnosed.
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