- LB51 Anorchia or microorchidia - A disorder affecting males, caused by an abnormality occurring in sex development during the antenatal period. This disorder is characterized by individuals who are born with absence of the testes, or with testes that are deficient in size and function. Confirmation is by physical examination, identification of low testosterone levels but elevated follicle stimulating hormone and luteinizing hormone levels in a blood sample, or imaging.
- LB58 Polyorchidism - A condition of the testes, caused by determinants arising during the antenatal period. This condition is characterized by the presence of more than two testicles. Confirmation is by imaging.
- 5A81.1 Testicular hypofunction - In pre-puberty, a disorder characterized by atrophied testes and sterility, abnormal height and absence of secondary sex characteristics. In post-puberty, a disorder characterized by depressed sexual function, loss of sex drive and sterility, muscle weakness and osteoporosis (due to loss of the androgen anabolic effect).
- GB04.0 Azoospermia - Any condition of the genital system affecting males, caused by obstruction of the reproductive tract, abnormal hormone levels, testicular failure, or inadequate production of spermatozoa. These conditions are characterized by the absence of a measurable level of sperm cells in semen, and very low levels of fertility. Confirmation is by the absence of spermatozoa in the sediment of a centrifuged sample of ejaculate.
- GB03 Atrophy of testis - A condition of the testis, caused by apoptosis of the cells due to diminished cellular proliferation, decreased cellular volume, decreased function, ischemia, malnutrition, disease, infection, mutation, or hormonal changes. This condition is characterized by a partial or complete decrease in size and function of the testis tissue.
- GB00 Hydrocele or spermatocele - A condition characterized by an accumulation of serous fluid in the tunica vaginalis testis or along the spermatic cord, and cystic swelling containing fluid and dead spermatozoa of the testicular epididymis, rete testis or efferent ductuli.
- LB52 Cryptorchidism - A disorder affecting males, caused by an abnormality occurring in sex development during the antenatal period. This disorder is characterized by the absence of one or both testes from the scrotum. This disorder may also present with reduced fertility, psychological implications, or increased risk of testicular germ cell tumours. Confirmation is by imaging, karyotyping, or identification of male sex hormones in a blood sample.