What is Your diagnosis?

You see a PIP joint, palmar longitudinal view

Bursa anserina

What is the exact anatomical location?

Bursitis trochanterica

Where exactly is the bursa located?

New case Elbow

Posterior view of the elbow, longitudinal.
What are Your findings?

source: http://images.rheumatology.org/viewphoto.php?albumId=75676&imageId=4311671