Hydatid cyst signs
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There are several signs of hydatid cysts seen associated with hydatid disease:
- cumbo sign: air is seen between the pericyst and the laminated membrane of the cyst
- serpent sign: internal rupture of the cyst with collapse of membranes of the parasite into the cyst
- water lily sign: endocyst floats freely in the cyst fluid
- spin sign/whirl sign: detached membranes with small pleural reaction seen in hydatid cyst of lung
- empty cyst sign: may be seen after complete evacuation of parasitic membranes
- crescent sign: when the hydatid cyst erodes the adjacent bronchus or bronchiole, the trapped air between the pericyst and the laminated membrane of the endocyst give a crescent-shaped rim of air around the cyst, thus is termed the crescent sign 4,5. when the crescent-shaped rim of air is noted at the lower edge of the cyst, it is called inversed crescent sign 4,5.
- honeycomb pattern: appearance of multivesicular cysts with multiple septa that represent the walls of daughter cysts
-<a href="/articles/ball-of-wool-sign-hydatid-cyst">water lily sign</a>: endocyst floats freely in the cyst fluid </li>- +<a title="Water-lily sign (hydatid cyst)" href="/articles/water-lily-sign-hydatid-cyst">water lily sign</a>: endocyst floats freely in the cyst fluid </li>
-<a href="/articles/spin-sign">spin sign</a> / <a href="/articles/whirl-sign-of-hydatid-disease">whirl sign</a>: detached membranes with small pleural reaction seen in hydatid cyst of lung</li>- +<a title="Spin sign" href="/articles/ball-of-wool-sign-hydatid-cyst">spin sign</a>/<a title="whirl sign" href="/articles/whirl-sign">whirl sign</a>: detached membranes with small pleural reaction seen in hydatid cyst of lung</li>
-<a href="/articles/crescent-sign-inverted-crescent-sign-hydatid-disease">crescent sign</a>: when the hydatid cyst erodes the adjacent bronchus or bronchiole, the trapped air between the pericyst and the laminated membrane of the endocyst give a crescent-shaped rim of air around the cyst, thus is termed the crescent sign<sup> 4,5</sup>. when the crescent-shaped rim of air is noted at the lower edge of the cyst, it is called <a href="/articles/honeycomb-pattern-of-hydatid-cyst">inversed crescent sign</a><sup> 4,5</sup>.</li>- +<a href="/articles/crescent-sign-inverted-crescent-sign-hydatid-disease">crescent sign</a>: when the hydatid cyst erodes the adjacent bronchus or bronchiole, the trapped air between the pericyst and the laminated membrane of the endocyst give a crescent-shaped rim of air around the cyst, thus is termed the crescent sign<sup> 4,5</sup>. when the crescent-shaped rim of air is noted at the lower edge of the cyst, it is called inversed crescent sign<sup> 4,5</sup>.</li>
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