Epidermal inclusion cyst - knee

Case contributed by Dr Maulik S Patel


Painless anterior knee nodular swelling - 2 yrs. No trauma. Referred for ultrasound evaluation of the lesion.

Patient Data

Age: about 50 yrs
Gender: Male

Well-defined ovoid lesion is seen in region of interest.

Size           - 55 X 50 X 30 mm

Location     - Subcutenous plane.
                  -  Abutts deeper surface of skin
                  - Seperate from bone / muscle / joint space.
Morphology - Heterogeneous with tiny hypoechoic clefts, echogenic clefts
                   - NO calcification 
                  - Partly compressible.

Dopplar         - NO flow.      


A soft tissue swelling is noted just cranial to patella.

Case Discussion

Classical findings of an epidermal inclusion cyst also known as sebaceous cyst.

Surgical excision done.

Histo-pathology - epidermal inclusion cyst. 

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Case information

rID: 30091
Published: 18th Jul 2014
Last edited: 18th Dec 2015
Inclusion in quiz mode: Included

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