Polycystic ovaries can be misinterpreted as complex
cysts.
The reason for this is that
the cysts in PCOS are a cluster of simple
cysts that can give
the appearance on imaging as one (larger) cyst with septations.
However, most ovarian cysts, tumors and masses are benign / non-cancerous. Ovarian cancer is rare but, sadly, typically has a poor prognosis mainly because it isn't diagnosed early.