An andrologist is a medical practitioner who specialises in pathologies of the male genital tract.

- Pathologies of the penis : erectile disorders, impotence, curved penis, « small penis », Peyronie's disease, infections ...
- Pathologies of the prostate : benign tumors (adenoma : benign prostatic hypertrophy), malignant tumors (prostate cancers), infections (prostatitis), Andropause ...
- Pathologies of the testis : tumors, infections, varicocele, pain ....