The liver plays several complex but essential roles in the metabolism of amino acids, carbohydrates, and lipids as well as synthesis of proteins. The basic pathophysiology of parenchymal hepatic diseases usually represents a failure in one of these metabolic pathways. 1 Diagnosis of liver pathology rests on physical examination, laboratory investigation, newer imaging techniques, radio isotope scanning. 2 etc. Radiological techniques like ultrasonography and CT scan have roles in evaluation of these liver diseases. Ultrasound plays an important role in evaluation of liver pathology. It helps by detecting lesions, gives clue about its internal structure giving idea about its exact extent: it also gives opportunity to evaluate other abdominal organs. Correlation of ultrasonographic findings with clinical data, laboratory investigations and other radiological investigations lead to make a definite and accurate diagnosis. Thus appropriate management of patients can be done. Present study includes focal and pathology. In present years ultrasonography is widely accepted as first line radiological investigation for liver pathology detection. It is noninvasive cheap, quick free of radiation hazards, comfortable for patients. 3 easy to re-perform and very accurate in hands of skilled operator. With Colour Doppler it is possible to evaluate vascularity of lesion. Ultrasonographic contrast media helps in determination of exact extent of lesion and vascularity of lesion. CT scan is very helpful to evaluate focal as well as diffuse liver pathology. 4 Other investigations like MRI, radionuclide scanning, DSA. 5 etc. are also helpful in liver pathology.

BACKGROUNDUltrasound helps by detecting lesions, give idea about its internal structure and also give opportunity to evaluate other abdominal organs. However, evaluation by CT scan can give additional information which can modify the course of treatment and prognosis of patient. Hence, characterisation of lesions by CT scan is vital.The aim of this study was to evaluate hydatid cyst disease of liver by USG and CT scan for location, characterisation, age group predominance, sex predominance with demographic and clinical profile in different pathological conditions. MATERIALS AND METHODSThis descriptive study was done at Radiology Department in CRG Hospital and RD Gardi Medical College from 2015 to 2016. It is a descriptive study. 50 patients were included in the study. Their age and sex were noted. Clinical lab findings were documente d. Detailed histopathological examination of liver aspirate material was conducted and diagnosis was confirmed. The diagnosis on histopathology is correlated with USG and CT abdomen findings. RESULTThe youngest patient was 14 years old and the oldest was 72 years old. Maximum number of patients were in age group of 31 -40 years (32%). Minimum number of patients were in age group of 0 -10 years (0%). Right lobe involvement was seen in 13 (52%) patients, in 10 (40%) patients left lobe involvement was seen and in 2 (8%) patients both the lobes were involved. Pain in the right hypochondrium was the most common presentation with (64%) of cases followed by weakness with (40%) of patients. CONCLUSIONComputerised tomography is useful to determine density of a particular lesion. So useful in detection of calcification, haemorrhage, fatty changes clear and purulent fluid. It is also useful in exact determination of the extent of particular lesion and having radiation exposure, so cannot be safely used in pregnant ladies and children or repeated follow-ups. In present study, the most common affected age group was 31 -60 years to be and followed by (16%) is > 60 years. Male-to-female ratio was suggestive of male predominance (56%). Right lobe are affected most, followed by both lobes and then the left lobe. Pain in right hypochondrium is the most common presentation followed by weakness is the next most common presentation. In liver hydatid ,most common echo pattern is mix echogenic and anechoic, and right lobe is more commonly involved.