When a male goes for bilateral orchiectomy or surgical castration, are his testicles thrown away, taken for research or given back to the patient?

Here are some...: Surgical castration has been almost entirely replaced by medical one through intense sex hormonal manipulation over the past 2 decades. If done, the disposal of surgical specimen may vary reflecting the preference or discretion of surgeons & facilities for professional and cost control. Largely, the removed testes are usually sent to lab for pathological confirmation, but at times may be disposed