Asian Journal of Case Reports in Surgery

Hydatidosis (Echinococcosis) - Infestation by the larval or cystic stage of Echinococcus granulosus (unilocular) and rarely by Echinococcus multilocularis (alveolar echinococcosis, multilocular cysts) (Zöller et al., 2022). Liver is the most common site for Hydatid cysts. A 40 year-old female patient, presented in OPD with chief complaints of swelling in the right thigh since 1 yr. No history of pain, trauma, fever, discharge from swelling, difficulty in walking, weakness, tingling/ numbness in the limb, loss of sensation, colour change in the limb. USG of thigh suggestive of large well defined multiloculated, anechoic, cystic lesion in intramuscular plane (quadriceps muscle) likely Hydatid cyst. MRI of the right lower limb confirmed diagnosis. The patient underwent Evacuation of intramuscular Hydatid cysts with intra op findings being multiloculated cyst within the quadriceps muscle planes with >200 clear fluid filled daughter cysts ranging from 0.5cm to 5cm.Post operative period was uneventful. Patient was discharged and follow-up was uneventful.