Question
False about hydatid cyst of liver:
| A. |
Mostly asymptomatic
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| B. |
Most commonly located in right lobe of liver
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| C. |
Most common causative organism is echinococcus granulosus
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| D. |
Hepatic resection is never done
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Show Answer
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Correct Answer » D
Explanation
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Anatomical Role
– The liver is the most frequent site affected by hydatid cysts due to the portal venous drainage trapping the Echinococcus larvae.
– The right lobe of the liver is larger and receives a greater blood flow, making it the most common site for hydatid cysts.
Clinical Reasoning for the Correct Answer
– Hepatic resection (partial liver removal) can be indicated in complicated cases of hydatid cysts, such as large cysts, cysts with multiple daughter cysts, cysts causing biliary obstruction, or cysts complicated by infection or rupture.
– The statement that hepatic resection is never done is false because surgical intervention, including resection, is an important and sometimes necessary treatment modality.
Why Option A is Incorrect
– Hydatid cysts are often asymptomatic in early stages due to slow cyst growth and the liver’s large reservoir.
– Symptoms commonly appear late, from mass effect or complications (e.g., rupture).
– Thus, saying “mostly asymptomatic” is true.
Why Option B is Incorrect
– The right lobe of liver is more frequently involved (~60%-70%) than the left lobe because of its larger size and blood flow.
– Hence, this statement is true.
Why Option C is Incorrect
– The causative organism of hepatic hydatid cysts is *Echinococcus granulosus*, a tapeworm transmitted via dogs (definitive host) and sheep (intermediate host).
– This statement is accurate.
