| 词条 | Caput medusae |
| 释义 |
| name = Caput medusae | image = Caput medusae CT ax 002.jpg | caption = Axial CT showing portosystemic collateral circulation via the umbilical vein: caput medusae in liver cirrhosis | pronounce = | field = Gastroenterology | synonyms = Palm tree sign | symptoms = | complications = | onset = | duration = | types = | causes = | risks = | diagnosis = | differential = | prevention = | treatment = | medication = | prognosis = | frequency = | deaths = }} Caput medusae is the appearance of distended and engorged superficial epigastric veins, which are seen radiating from the umbilicus across the abdomen. The name caput medusae (Latin for "head of Medusa") originates from the apparent similarity to Medusa's head, which had venomous snakes in place of hair. It is also a sign of portal hypertension. It is caused by dilation of the paraumbilical veins, which carry oxygenated blood from mother to fetus in utero and normally close within one week of birth, becoming re-canalised due to portal hypertension caused by liver failure. Differential diagnosisInferior vena cava obstruction
Determine the direction of flow in the veins below the umbilicus. After pushing down on the prominent vein, blood will:
See also
ReferencesExternal links{{Medical resources| DiseasesDB = | ICDO = | OMIM = | MedlinePlus = | eMedicineSubj = | eMedicineTopic = | MeshID = |ICD10 = {{ICD10|I|86|8|i|80}} (ILDS I86.820) | |ICD9 = {{ICD9|456.8}} | }}{{Vascular diseases}} 2 : Medical signs|Diseases of arteries, arterioles and capillaries |
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