Case Number : Case 2954 - 02 November 2021 Posted By: Uma Sundram

A weird, not well circumscribed, SCL. 

1 minute ago, vincenzo said:

A weird, not well circumscribed, SCL. 

Agree. Dermal SCLs can be not circumscribed. 

SCL?  Please elaborate.

21 hours ago, Richard Logan said:

SCL?  Please elaborate.

I think it means spindle cell lipoma

There are some islands of mature adipose tissue intermingled with wide septal of connective tissue, inside of them we can see spindle cells CD34 positive. Agree with Spindle Cell Lipoma.

46 minutes ago, Victor Delgado said:

There are some islands of mature adipose tissue intermingled with wide septal of connective tissue, inside of them we can see spindle cells CD34 positive. Agree with Spindle Cell Lipoma.

Agree

12 hours ago, Victor Delgado said:

There are some islands of mature adipose tissue intermingled with wide septal of connective tissue, inside of them we can see spindle cells CD34 positive. Agree with Spindle Cell Lipoma.

Yes, I too agree.  It is interesting that this example shows the SCL infiltrating around the normal fat lobules.  In most of the other examples on the website (see below) the SCL infiltrates into the lobules, in some cases obliterating them completely.

For comparison:

Case 132 December 2010

Case 290  July 2011

Case 458 March 2012 (superb example)

Case 551 19th July 2012

Case 2098 21st June 2018

Case 2176 11th October 2018

Spindle cell lipoma. Although they often have a myxoid background, I thought the myxoid background here was quite striking and may get people to think of other myxoid soft tissue tumors.