Abstract
BACKGROUND: Human echinococcosis (Hydatidosis or hydatid disease) is caused by the larval stages of cestodes (tapeworm) of the genus echinococcus. Rapid on-site evaluation (ROSE) can be used an adjunct to the diagnosis of lesion which can help collection of further samples and taking adequate precautions. CASE REPORT: A 45-year female presented with an incidental right hypogastric mass for 4 months. Wet mount and ROSE were preformed on the sample collected and diagnosis of Hydatosis liver was made. CONCLUSION: Pre-operative diagnosis of cystic echinococcosis is mandatory to prevent anaphylaxis or local recurrence. Use of clinical, radiological findings can indicate the possibility of the parasitic infection. However, ROSE on the fresh sample can help in conformation of the diagnosis.