The best replacement for hydrops is ascites.

The best alternatives to hydrops are rated as following:
★★★★★  ascites

Your alternative for hydrops is not listed? Suggest!
Speaking about hydrops, one probably shouldn't forget about cystic hygroma.

Other search terms related to hydrops and their ratings are:
★★★★★ cystic hygroma
★★★ turner syndrome
★★★ keratoconus
You have in mind a companion for hydrops and it is not yet here? Propose!



Google Trends

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hydrops
ascites