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  Indian J Med Microbiol
 

Figure 2: Annulus fossa ovalis. (a) The annulus is raised along the whole circumference (black arrows). The fossa ovalis show redundancy. (b) The annulus is flat except in its upper part which shows a prominent recess (red arrows).

Figure 2: Annulus fossa ovalis. (a) The annulus is raised along the whole circumference (black arrows). The fossa ovalis show redundancy. (b) The annulus is flat except in its upper part which shows a prominent recess (red arrows).