Tarlov cyst

Case contributed by Mostafa Elfeky
Diagnosis almost certain

Presentation

Right loin pain and sciatica.

Patient Data

Age: 45 years
Gender: Female

MRI Sacral spine

mri

A peri-neural cyst at the level of S2 segment lateralizing to right with smooth scalloping of the related bony skeletonand mild effacement of the related right sided sacral nerve roots. It is measuring 1.5x 1.8 x 2.5 cm in dimensions.

Case Discussion

Tarlov cysts are benign perineural cysts, typically occurring in the lower lumbar and sacral spine, usually seen at the existing foramina arising from exiting nerve roots. They are more common in females. These benign cysts are usually asymptomatic, however sometimes they can grow to a large size and cause pressure symptoms and bone remodeling as in this patient. 

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