<prompt> Most useful investigation of choice for liver abscess isExploratory laparotomyUltrasoundLiver enzymesParasite in the stool  <response>: Ans. b UltrasoundRef: Bailey Love 25th 169 On ultrasound, an abscess cavity in the liver is seen as a hypoechoic or anechoic lesion with ill-defined borders; internal echoes suggest necrotic material or debris. The investigation is very accurate and is used for aspiration, both diagnostic and therapeutic. Where there is doubt about the diagnosis, a computerized tomography CT scan may be helpful.Also KnowDiagnostic pointers for infection with Entamoeba histolytica Bloody mucoid diarrhoea in a patient from an endemic area or following a recent visit to such a place Upper abdominal pain, fever, cough, malaise In chronic cases, a mass in the right iliac fossa amoeboma Sigmoidoscopy shows typical ulcers--biopsy and scrapings may be diagnostic Serological tests are highly sensitive and specific outside endemic areas Ultrasound and CT scans are the imaging methods of choice. 