"She lives as a man in her body."

Translation: Sie lebt als ein Mann in ihrem Körper.

[Julika]

Good question! "as" and "like" can be considered as synonyms, but in this example the difference in meaning is significant enough.
"She lives AS a man in her body" - She feels like a/identifies as a man.
"She lives LIKE a man in her body" - She may still feel like a female, but acts in the body like a man would.

[Denis44]

"Sie lebt wie ein Mann in ihrem Körper." Als or wie, what is the difference?

[Pangeran.anarki]

Boyish girl i suppose ?