| Revision as of 21:48, 16 January 2025 editNetha Hussain (talk | contribs)Autopatrolled, Extended confirmed users11,929 edits + linking relevant terms← Previous edit | Latest revision as of 21:50, 16 January 2025 edit undoNetha Hussain (talk | contribs)Autopatrolled, Extended confirmed users11,929 edits →Pathophysiology: linking HU | ||
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| {{Short description|Radiological sign of the abdomen}} | {{Short description|Radiological sign of the abdomen}} | ||
| The '''misty mesentery sign''' is a non-specific radiological finding characterized by increased attenuation within the |
The '''misty mesentery sign''' is a non-specific radiological finding characterized by increased attenuation within the mesenteric fat on computed tomography (CT) imaging. It reflects pathological processes that result in infiltration, edema, or increased cellularity within the mesentery, often in association with inflammation and adjacent ].<ref>{{cite journal |last1=Yudin |first1=Andrey |title=Misty Mesentery Sign and Fat Halo Sign |journal=Metaphorical Signs in Computed Tomography of Chest and Abdomen |date=2014 |pages=167–167 |doi=10.1007/978-3-319-04013-4_84 |url=https://link.springer.com/chapter/10.1007/978-3-319-04013-4_84 |access-date=16 January 2025 |publisher=Springer International Publishing |language=en}}</ref> The term "misty" is descriptive of the hazy appearance of the mesenteric fat, which typically has a lower attenuation on CT in healthy individuals.<ref name=misty>{{cite journal |last1=McLaughlin |first1=Patrick D. |last2=Filippone |first2=Antonella |last3=Maher |first3=Michael M. |title=The “Misty Mesentery”: Mesenteric Panniculitis and Its Mimics |journal=American Journal of Roentgenology |date=February 2013 |volume=200 |issue=2 |pages=W116–W123 |doi=10.2214/AJR.12.8493 |url=https://www.ajronline.org/doi/10.2214/AJR.12.8493 |access-date=16 January 2025 |issn=0361-803X}}</ref> | ||
| ==Pathophysiology== | ==Pathophysiology== | ||
| The misty mesentery sign results from abnormal accumulation of fluid, cells, or fibrotic material within the mesentery. The causes can be classified into inflammatory, neoplastic, or vascular categories.<ref>{{cite journal |last1=Lal |first1=Hira |last2=Yadav |first2=Priyank |title=Misty mesentery: a CT sign of mesenteric infiltration |journal=Abdominal Radiology |date=1 March 2017 |volume=42 |issue=3 |pages=977–978 |doi=10.1007/s00261-016-0934-1 |url=https://link.springer.com/article/10.1007/s00261-016-0934-1?shared-article-renderer |access-date=16 January 2025 |language=en |issn=2366-0058}}</ref> The attenuation changes are measured in Hounsfield Units (HU), with affected mesenteric fat demonstrating values higher than normal fatty tissue (typically less than -100 HU).<ref>{{cite journal |title=The sign of misty mesentery: differential diagnosis on multi-detector computed tomography - Il Giornale Italiano di Radiologia Medica 2019 Gennaio-Febbraio;6(1):71-83 |journal=www.minervamedica.it |url=https://www.minervamedica.it/en/journals/radiologia-medica/article.php?cod=R24Y2019N01A0071 |access-date=16 January 2025 |language=en}}</ref> | The misty mesentery sign results from abnormal accumulation of fluid, cells, or fibrotic material within the mesentery. The causes can be classified into inflammatory, neoplastic, or vascular categories.<ref>{{cite journal |last1=Lal |first1=Hira |last2=Yadav |first2=Priyank |title=Misty mesentery: a CT sign of mesenteric infiltration |journal=Abdominal Radiology |date=1 March 2017 |volume=42 |issue=3 |pages=977–978 |doi=10.1007/s00261-016-0934-1 |url=https://link.springer.com/article/10.1007/s00261-016-0934-1?shared-article-renderer |access-date=16 January 2025 |language=en |issn=2366-0058}}</ref> The attenuation changes are measured in ] (HU), with affected mesenteric fat demonstrating values higher than normal fatty tissue (typically less than -100 HU).<ref>{{cite journal |title=The sign of misty mesentery: differential diagnosis on multi-detector computed tomography - Il Giornale Italiano di Radiologia Medica 2019 Gennaio-Febbraio;6(1):71-83 |journal=www.minervamedica.it |url=https://www.minervamedica.it/en/journals/radiologia-medica/article.php?cod=R24Y2019N01A0071 |access-date=16 January 2025 |language=en}}</ref> | ||
| ==Radiological features== | ==Radiological features== | ||
| The misty mesentery sign is typically identified on contrast-enhanced CT scans, particularly in the portal venous phase. Key imaging characteristics include hazy attenuation of mesenteric fat, with loss of the normal fat density and co-oexisting findings such as lymphadenopathy, ascites, or thickening of mesenteric vessels or bowel loops. The distribution of the mesenteric changes may help narrow the differential diagnosis.<ref name=misty/> | The misty mesentery sign is typically identified on contrast-enhanced CT scans, particularly in the portal venous phase. Key imaging characteristics include hazy attenuation of mesenteric fat, with loss of the normal fat density and co-oexisting findings such as lymphadenopathy, ascites, or thickening of mesenteric vessels or bowel loops. The distribution of the mesenteric changes may help narrow the differential diagnosis.<ref name=misty/> | ||
Latest revision as of 21:50, 16 January 2025
Radiological sign of the abdomenThe misty mesentery sign is a non-specific radiological finding characterized by increased attenuation within the mesenteric fat on computed tomography (CT) imaging. It reflects pathological processes that result in infiltration, edema, or increased cellularity within the mesentery, often in association with inflammation and adjacent lymphadenopathy. The term "misty" is descriptive of the hazy appearance of the mesenteric fat, which typically has a lower attenuation on CT in healthy individuals.
Pathophysiology
The misty mesentery sign results from abnormal accumulation of fluid, cells, or fibrotic material within the mesentery. The causes can be classified into inflammatory, neoplastic, or vascular categories. The attenuation changes are measured in Hounsfield Units (HU), with affected mesenteric fat demonstrating values higher than normal fatty tissue (typically less than -100 HU).
Radiological features
The misty mesentery sign is typically identified on contrast-enhanced CT scans, particularly in the portal venous phase. Key imaging characteristics include hazy attenuation of mesenteric fat, with loss of the normal fat density and co-oexisting findings such as lymphadenopathy, ascites, or thickening of mesenteric vessels or bowel loops. The distribution of the mesenteric changes may help narrow the differential diagnosis.
References
- Yudin, Andrey (2014). "Misty Mesentery Sign and Fat Halo Sign". Metaphorical Signs in Computed Tomography of Chest and Abdomen. Springer International Publishing: 167–167. doi:10.1007/978-3-319-04013-4_84. Retrieved 16 January 2025.
- ^ McLaughlin, Patrick D.; Filippone, Antonella; Maher, Michael M. (February 2013). "The "Misty Mesentery": Mesenteric Panniculitis and Its Mimics". American Journal of Roentgenology. 200 (2): W116 – W123. doi:10.2214/AJR.12.8493. ISSN 0361-803X. Retrieved 16 January 2025.
- Lal, Hira; Yadav, Priyank (1 March 2017). "Misty mesentery: a CT sign of mesenteric infiltration". Abdominal Radiology. 42 (3): 977–978. doi:10.1007/s00261-016-0934-1. ISSN 2366-0058. Retrieved 16 January 2025.
- "The sign of misty mesentery: differential diagnosis on multi-detector computed tomography - Il Giornale Italiano di Radiologia Medica 2019 Gennaio-Febbraio;6(1):71-83". www.minervamedica.it. Retrieved 16 January 2025.