Gynecomastia is a common disorder of the endocrine system in which there is a non-cancerous increase in the size of male breast tissue.
An epispadias is a rare type of malformation of the penis in which the urethra ends in an opening on the upper aspect (the dorsum) of the penis.
Micropenis is an unusually small penis.
Erectile dysfunction (ED) or impotence is sexual dysfunction characterized by the inability to develop or maintain an erection of the penis during sexual activity in humans.
Hypospadias /haɪpoʊˈspeɪdɪəs/ is a birth defect of the urethra where the urinary opening is not at the usual location on the head of the penis.
Phimosis is a condition of the penis where the foreskin cannot be fully retracted over the glans penis.
Premature ejaculation (PE) occurs when a man experiences orgasm and expels semen soon after sexual activity and with minimal penile stimulation.
A hydrocele (Br English: hydrocoele) denotes a pathological accumulation of serous fluid in a body cavity.
Aspermia is the complete lack of semen with ejaculation (not to be confused with azoospermia, the lack of sperm cells in the semen).
Hypogonadism means diminished functional activity of the gonads—the testes in males or the ovaries in females—that may result in diminished sex hormone biosynthesis.
A varicocele is an abnormal enlargement of the pampiniform venous plexus in the scrotum.
Paraphimosis (/ˌpærəfaɪˈmoʊsᵻs/ or /ˌpærəfəˈmoʊsᵻs/) is an uncommon medical condition in which the foreskin of an uncircumcised penis becomes trapped behind the glans penis, and cannot be reduced (pulled back to its normal flaccid position covering the glans).
Balanitis is inflammation of the glans penis.
Diphallia, penile duplication (PD), diphallic terata, or diphallasparatus, is a rare developmental abnormality in which a male infant is born with two penises.
Orchitis /ˌɔːrˈkaɪtɪs/ or orchiditis /ˌɔːrkɪˈdaɪtɪs/ (from the Ancient Greek ὄρχις meaning "testicle"; same root as orchid) is inflammation of the testes.
Penile fracture is rupture of one or both of the tunica albuginea, the fibrous coverings that envelop the penis's corpora cavernosa.
Peyronie's disease or Peyronie disease (/peɪroʊˈniː/), also known as induratio penis plastica (IPP) or chronic inflammation of the tunica albuginea (CITA), is a connective tissue disorder involving the growth of fibrous plaques in the soft tissue of the penis affecting an estimated 5% of men.
Priapism is a medical condition in which the erect penis does not return to its flaccid state, despite the absence of both physical and psychological stimulation, within four hours.
Cryptorchidism is the absence of one or both testes from the scrotum.
Anorchia (or anorchism) is an XY disorder of sex development in which individuals have both testes absent at birth.
Monorchism (also monorchidism) is the state of having only one testicle within the scrotum.
Male genital disease
A male genital disease is a condition that affects the male reproductive system.
Frasier syndrome is a urogenital anomaly associated with the WT1 (Wilms tumor 1 gene) gene.
Webbed penis, also called penis palmatus or penoscrotal fusion, is an acquired or congenital condition in which the scrotal skin extends onto the ventral penile shaft.
Atypical small acinar proliferation
In urologic pathology, atypical small acinar proliferation, abbreviated ASAP, is a collection of small prostatic glands, on prostate biopsy, whose significance is uncertain and cannot be determined to be benign or malignant.
Male infertility refers to a male's inability to cause pregnancy in a fertile female.
Ejaculatory duct obstruction
Ejaculatory duct obstruction (EDO) is a congenital or acquired pathological condition which is characterized by the obstruction of one or both ejaculatory ducts.
Vasitis nodosa is a complication experienced in approximately 66% of men who undergo vasectomy.
Retrograde ejaculation occurs when semen, which would, in most cases, be ejaculated via the urethra, is redirected to the urinary bladder.
Frenulum breve, or short frenulum, is a condition in which the frenulum of the penis, which is an elastic band of tissue under the glans penis that connects to the foreskin and helps contract it over the glans, is too short and thus restricts the movement of the foreskin.
Androgen deficiency also known as hypoandrogenism and androgen deficiency syndrome, is a medical condition characterized by not enough androgenic activity in the body.
Hyperandrogenism, or androgen excess, is a medical condition characterized by excessive levels of androgens in the body and the associated effects of these excessive levels of androgens.
Pneumoscrotum is a rare medical condition in which gas accumulates in the scrotum.