From what you have written it is difficult to tell if your wife may have PCOS or not.
Many different things cause irregular periods and acne.
PCOS is unable to be diagnosed by ultrasound alone, blood tests for hormone levels are also required. I feel that once a person has a diagnosis of what is wrong with them, things can start getting better, no matter what the condition is. PCOS isn't curable, but it is treatable. I hope the scan is able to igve you some idea of whats going on. This information is provided for educational purposes only.