Mohammed Etaiwi, Loai Mabreh.
Intramuscular Hydatid cyst of the superior rectus muscle.
Pak J Med Sci Jan ;24(4):762-4.

In endemic areas hydatid cyst should be included in the differential diagnosis of focal intramuscular orbital cystic lesion. In addition, the presence of undulating membrane within the cyst is a feature that can exist in intramuscular OHC. We report a unique case of intramuscular hydatid cyst located in the superior rectus muscle and it`s MRI appearance. T2W MRI images showed undulating hypointense membrane diagnostic of hydatid cyst.

PakMediNet -Pakistan's largest Database of Pakistani Medical Journals - http://www.pakmedinet.com