Abstract

Human hydatid cyst is a zoonotic disease caused by the larvae of the Echinococcus species, most commonly the Echinococcus granulosus. Although hydatid cyst can cause disease almost anywhere in the human body, it most commonly affects the liver and lungs. Primary musculoskeletal hydatid involvement is a very rare occurrence even in endemic regions. Musculoskeletal hydatid disease shows no pathognomonic clinical signs and symptoms. And the contribution of serology to the diagnosis is negligible due to the high rate of false-negative results. Therefore, radiological imaging studies have a critical role in the diagnosis of the disease. To the best of our knowledge, there are only a few case reports of primary hydatid involvement of the adductor magnus muscle in the current literature. Here we present a 55-year-old female patient with primary hydatid cyst in the adductor magnus muscle and discuss the case in terms of imaging.

Highlights

  • A 55-­year-o­ ld female presented with painless swelling in the right thigh over the last few weeks

  • Comprehensive imaging studies revealed no other cystic lesions anywhere in the body and the patient was diagnosed with primary hydatid cyst (HC) in the adductor magnus muscle

  • Human HC is a zoonotic disease caused by the larvae of the Echinococcus granulosus acquired through contact with carnivores, most commonly with dogs

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Summary

Introduction

A 55-­year-o­ ld female presented with painless swelling in the right thigh over the last few weeks. MRI showed that the cyst was limited in the adductor magnus muscle and was 55 × 40 × 76 mm (T x AP x CC) (Figure 1). On T1 weighted images, the daughter cysts were hypointense and the mother cyst was iso-­hyperintense as compared with the adjacent muscle tissue.

Results
Conclusion

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