Presentation
Left gluteal region swelling - about 5 - 6 mths. P/H/o surgery in left gluteal region in neonatal period - No details available. H/o recurrent discharge locally during childhood.
Patient Data

There is a well-defined ovoid lesion is seen in region of interest.
Size - 50 x 40 x 30 mm
Location - lesion abutts skin
- lesion in subcutenous plane.
- Seperate from bone and muscle.
- It abutts skin scar
Morphology - Heterogeneous
- internal fluid clefts, with lobulated hyperechoic areas without vascularity
- Multiple Linear echogenic foci are noted in lesion
Wall - thin wall of less than 2 mm around lesion
Doppler - No flow in lesion.
Case Discussion
There is a subcutaneous lesion containing hair follicles.
Histopathology ( verbal communication with operating surgeon ) - Dermoid.