Oval Fossa

The oval fossa, which can be seen on dissection of the heart chambers is an indentation in the posterior wall of the right atrium. It is an embryologic remnant of the oval foramen, which allows for a right to left shunt (i.e., bypassing the fetal lungs.) In approximately 15 to 25% of the population there [...]

Source: http://insidesurgery.com/2011/04/oval-fossa/

Frozen Shoulder Calcific Tendonitis Shoulder Instability Shoulder Dislocation Shoulder Separation