May 2012 - Presented by Michael Van Ness, M.D.

Clinical history:

The patient is an 86 year old male with a past medical history significant for diabetes mellitus and hypertension who was incidentally found to have a left lung mass discovered on chest radiographs (during work-up for dull chest pain). Follow up chest CT showed a well circumscribed 4x2x1cm pleural based peripheral lung mass which was attached by a broad pedicle. He subsequently underwent VATS procdure for excision.


Gross description:

Received fresh was a 10 gram wedge resection that contained a 5 x 2.5 x 1.5cm lobulated, well circumscribed, firm, white nodule with a homogenous cut surface. The attached lung parenchyma was unremarkable. The following stains were prefomed:
  • CD34 +
  • CD99 +


Chest CT:

Image 1 (Click to enlarge)


Microscopic images:


Microscopic image 1 (Click to enlarge) Microscopic image 2 (Click to enlarge) Microscopic image 3 (Click to enlarge) Microscopic image 4 (Click to enlarge)