Hi, many thanks for the query!
1) Well, 10 mm is not a small calculus, it is less likely to pass out from ureters on its own, needs surgical removal, PCNL is a good option or RIRS can be attempted. Till then take antispasmodics, tamsulosin
, diuretics with your doctor's opinion.
2) You haven't mentioned your age. Though prostate
size & shape appears to be normal, post void residue of 400 ml is abnormal.
You need to do certain investigations- USG KUB, X-ray KUB, Urine (R&M),
, Sr. BUN, Sr. Uric acid, Sr. PSA, Uroflowmetry.
Per Rectal examination
by your doctor to know prostate size & more importantly its consistency.
If prostate is HARD in consistency on P/R exam. & Sr. PSA is raised, it indicates malignancy (cancer), in which case you need to do TRUS-biopsy
of prostate to get the histopathological diagnosis.
Wish you a good health.