Thus Spoke Rohan Kishibe Episode #08: D・N・A

Kishibe Rohan wa Ugokanai Episode 8: D.N.A

A woman who lost her husband when he was young asks Rohan to cure her daughter, born from a sperm bank, of "certain traits" appearing in her body.

(Source: JoJo's Bizarre Encyclopedia)

Note: The chapter was later changed to Episode 8 in the tankoubon release.