Paratubal Cysts vs. Hydatid of Morgagni, ICD-9

I am coding pathology reports. Sometimes these are referred to by one name or the other; sometimes they are both used, as in "paratubal cyst (Hydatid of Morgagni)."

The two codes that seem applicable to me are 620.8 - Paratubal cyst and 752.11 - Hydatid of Morgagni. I am never confident about choosing one over the other, however, since it seems they are synonymous.

Can someone clarify this issue for me? Thanks very much in advance!

Paratubal Cysts vs. Hydatid of Morgagni, ICD-9