Mickey Mouse sign

Mickey Mouse sign is a medical sign resembling the head of Mickey Mouse, the Walt Disney character. Presented for the very first time at the CHIVA's Meeting, Berlin 2002 by Dr. Lurdes Cerol,[citation needed] this sign has been described as the image at the groin when a dilated accessory saphenous vein (ASV) exists: the common femoral vein (CFV) represents the head of Mickey Mouse while the great saphenous vein (GSV) and the dilated accessory saphenous vein (ASV) represent the ears. The presence of a Mickey Mouse sign has been a great diagnostic clue to check ASV insufficiency.

Mickey Mouse Sign, the original slide, at CHIVA's Meeting, Berlin 2002"

Mickey Mouse sign in the saphenofemoral junction, showing GSV, a dilated ASV and CFV

Some authors, inspired by this sign, described an ecographic "Mickey Mouse View" at the saphenofemoral junction in the groin: the common femoral vein (CFV) represents the head of Mickey Mouse while the great saphenous vein (GSV) and the accessory saphenous vein (ASV) represent the ears.[1]

But it can be seen in different regions of the body:

* Midbrain of progressive supranuclear palsy (PSP).[2]
* Polyostotic Paget's disease (Paget's disease affecting multiple bones); a bone scintigraphy with technetium-99m methylene bisphosphonate shows increased uptake at the sites of disease activity. Increased scintigraphic uptake in the body and spine of the vertebrae resembles the head of Mickey Mouse.[3]
* The portal triad in biliary ultrasound scans, with the portal vein comprising Mickey's head and the common bile duct and hepatic artery his right and left ears, respectively.[4]
* Pelvic Mickey Mouse sign: bilateral inguinal vesical hernia on transverse axial imaging.[5]
* Dysmorphic Mickey Mouse RBCs: RBCs with irregular cell walls and migration of hemoglobin into some areas creating the shape of Mickey Mouse ears.[6] The presence of these dysmorphic cells in urine may indicate intraglomerular haemorrhage.[7]
* Ureteropelvic junction obstruction (UPJO)[8]

## References

1. ↑ "Duplex ultrasound investigation of the veins in chronic venous disease of the lower limbs--UIP consensus document. Part I. Basic principles". European Journal of Vascular and Endovascular Surgery 31 (1): 83–92. January 2006. doi:10.1016/j.ejvs.2005.07.019. PMID 16226898.
2. ↑ "The Hummingbird sign: a diagnostic clue for Steele-Richardson-Olszweski syndrome". BMJ Case Reports 2012: bcr2012006263. September 2012. doi:10.1136/bcr-2012-006263. PMID 22987902.
3. ↑ "Mickey Mouse sign in a case of polyostotic Paget's disease". Indian Journal of Case Reports 3 (4): 279–80. November 2017. doi:10.32677/IJCR.2017.v03.i04.038.
4. ↑ Fox, J. Christian (2011-10-13) (in en). Atlas of Emergency Ultrasound. Cambridge University Press. ISBN 9781139499873. https://books.google.com/books?id=Dj8taWp2BEgC&pg=PA58.
5. ↑ ""Flying-saucer in the pelvis" sign: An equivalent of "pelvic Mickey mouse" sign". Indian Journal of Urology 33 (2): 173–174. 2017. doi:10.4103/0970-1591.203423. PMID 28469311.
6. ↑ Kher, Kanwal; Schnaper, H. William; Greenbaum, Larry A. (2016-11-25) (in en). Clinical Pediatric Nephrology. CRC Press. ISBN 9781482214635. https://books.google.com/books?id=rq40DgAAQBAJ&pg=PA132.
7. ↑ McClatchey, Kenneth D. (2002) (in en). Clinical Laboratory Medicine. Lippincott Williams & Wilkins. ISBN 9780683307511. https://books.google.com/books?id=3PJVLH1NmQAC&pg=PA539.
8. ↑ Visveswaran, kasi (2009) (in en). Essentials of Nephrology, 2/e. BI Publications Pvt Ltd. ISBN 9788172253233. https://books.google.com/books?id=c4xAdJhIi6oC&pg=PT76.

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Radiologic signs

Cardiovascular|

* Aortic unfolding
* Dense artery sign
* Halo sign

Respiratory|

* Air crescent sign
* Deep sulcus sign
* Golden S sign
* Hampton hump
* Kerley lines
* Peribronchial cuffing
* Sail sign of the chest
* Silhouette sign
* Steeple sign
* Thumbprint sign
* Traction bronchiectasis
* Tree-in-bud sign
* Westermark sign

Urogenital|

* Canga's bead symptom

Musculoskeletal|

* Crescent sign
* Fabella sign
* Fat pad sign/Sail sign of the elbow
* Osteopathia striata

Gastrointestinal|

* Cupola sign
* Double bubble
* Endoexoenteric
* Football sign
* Hampton's line
* Hot quadrate sign
* Mumoli's sign
* Omental cake
* Pneumatosis intestinalis
* Rigler's sign
* Sentinel loop

Neurological|

* Hot cross buns
* Hyperdense middle cerebral artery

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