Infantile digital fibromatosis

Click here to see the whole case: Use the right hand scroll bar and scroll down about 2/3s of the way.

These are excellent quality photos.

The cytoplasmic inclusions are ball-like 
clusters of intermediate filaments
ultrastructurally.

The can be immunostained using an antibody
to actin.

We have never had a case here that, as far
as I know.

Reference 1
Reference 2
Reference 3
Reference 4
Reference 5
Reference 6