Male GU Exam - Core Terminology & Definitions

Corpora cavernosa

Paired erectile tissue structures on the dorsal penis that engorge with blood during erection.

Corpus spongiosum

Column of erectile tissue surrounding the male urethra on the ventral side of the penis.

Prepuce

The foreskin covering the glans penis in uncircumcised males.

Smegma

Secretions of the glans penis that may collect under the foreskin of uncircumcised men.

Scrotal septum

Internal structure dividing the scrotum into two distinct compartments.

Normal post-pubertal testicle length

Normal adult testicular length measuring 4 to 5 cm.

Epididymis

Nodular, cord-like structure located on the posterior surface of the testicle.

Vas deferens

Stiff, tubular duct transporting sperm from the epididymis toward the ejaculatory duct.

Cremasteric muscle

Muscle layer within the scrotum and spermatic cord that elevates the testicle.

Prostate gland location

Surrounds the urethra at the bladder neck and is roughly testicle-sized.

Prostate gland function

Contributes to the production of ejaculatory fluid.

Vascular mechanism of erection

Increased arterial dilation combined with decreased venous outflow within the corpora cavernosa.

Inguinal canal

Tunnel medial and parallel to the inguinal ligament forming a pathway for the vas deferens.

Internal inguinal ring

Deep entrance to the inguinal canal through abdominal wall musculature.

External inguinal ring

Superficial exit of the inguinal canal superior to the pubic tubercle.

Urethral meatus

Terminal external orifice of the urethra located on the glans penis.

Incarcerated hernia

Nonreducible hernia where tissue is trapped outside the abdominal cavity.

Strangulated hernia

Nonreducible hernia with compromised blood supply to protruded tissue requiring emergency surgery.

Cremasteric reflex

Elevation of the testicle and scrotum upon stroking the ipsilateral inner thigh.

Tanner staging system

Objective 5-stage classification tracking development sequence of secondary sexual characteristics.

Paraphimosis

Inability to return retracted foreskin back over the glans, leading to venous congestion and edema.

Phimosis

Inability to retract foreskin from its natural position over the glans penis.

Pathologic phimosis

Nonretractable foreskin resulting from scarring due to trauma, infection, or inflammation.

Hypospadias

Congenital urethral defect where the meatus opens on the ventral surface of the penis.

Peyronie disease

Fibrous band in the corpus cavernosum causing penile curvature or indentation during erection.

Hydrocele

Fluid accumulation between the parietal and visceral layers of the tunica vaginalis.

Spermatocele

Benign cystic accumulation located on the epididymis, often containing sperm.

Erectile mechanism in male genitalia

Engorgement of corpora cavernosa caused by increased arterial dilation and decreased venous outflow.

Inguinal canal anatomical path

Lies medial and parallel to inguinal ligament, forming a tunnel for vas deferens through abdominal wall.

Vas deferens physical palpation distinction

Palpates as a slightly stiff, tubular structure, distinguishing it from surrounding softer spermatic cord vessels.

Transillumination differential in scrotal masses

Fluid-filled masses (hydroceles, spermatoceles) transilluminate, whereas solid testicular masses or normal testes do not.

Indirect vs direct inguinal hernia origin

Indirect hernias are commonly congenital at internal ring; direct hernias are acquired from tissue weakness near external ring.

Inguinal hernia palpation finger tip vs side

An indirect hernia touches the tip of the examining finger; a direct hernia touches the side.

Incarcerated vs strangulated hernia relationship

An incarcerated hernia is nonreducible; it becomes strangulated when tissue blood supply is compromised.

Cremasteric reflex anatomical pathway

Stroking inner thigh triggers ipsilateral contraction of cremasteric muscle, elevating testicle and scrotum.

Phimosis vs paraphimosis definition difference

Phimosis is inability to retract foreskin; paraphimosis is retracted foreskin trapped behind glans causing constriction.

Physiologic vs pathologic phimosis distinction

Physiologic phimosis stems from congenital adhesions in newborns; pathologic phimosis results from scar tissue formation.

Paraphimosis ischemia risk

Persistent foreskin entrapment causes venous stasis and glans ischemia, turning glans blue or black.

Hypospadias anatomical defect

Congenital displacement where the urethral meatus opens on the ventral surface of the penis.

Primary syphilis vs genital herpes lesion presentation

Syphilitic chancres are typically painless single ulcers, whereas genital herpes causes painful fluid-filled vesicles or erosions.

Peyronie disease mechanism

Fibrous plaque development in corpus cavernosum causing penile curvature or indentation during erection.

Hydrocele anatomical fluid location

Accumulation of serous fluid between parietal and visceral layers of tunica vaginalis.

Spermatocele contents and location

Benign cystic accumulation containing dead sperm, located superiorly and separately on the epididymis.

Varicocele vascular origin

Abnormal tortuosity and dilatation of the pampiniform venous plexus within spermatic cord.

Primary vs secondary varicocele positional response

Primary varicoceles collapse when supine; secondary varicoceles show no positional change regardless of posture.

Varicocele fertility relationship

Varicocele represents the most common surgically correctable cause of male factor infertility.

Epididymitis vs orchitis anatomical sites

Epididymitis is inflammation of epididymis (often secondary to UTI); orchitis is acute inflammation of testicle.

Testicular torsion physical exam orientation

Testicle presents as high-riding with horizontal lie, with epididymis located anteriorly instead of posteriorly.

Testicular torsion diagnostic reflex sign

Absence of cremasteric reflex on affected side strongly indicates testicular torsion.

Klinefelter syndrome genetic and genital features

XXY genotype leading to small firm testes, gynecomastia, tall stature, poor muscle tone, and infertility.

Tanner staging clinical purpose

Objective 5-stage classification system tracking adolescent development of primary and secondary sexual characteristics.

Tanner Stage 2 vs Stage 3 genitalia expansion

Stage 2 involves initial scrotal/testicular enlargement; Stage 3 features significant penile length enlargement.

Tanner Stage 4 vs Stage 5 pubic hair distribution

Stage 4 hair is adult-textured but restricted to pubis; Stage 5 hair spreads to medial thighs.

Foreskin replacement procedural rule

Retracted foreskin must always be replaced over glans immediately after exam to prevent paraphimosis.

Vascular mechanism of penile erection

Increased arterial dilation increases blood flow into the corpora cavernosa while decreased venous outflow traps blood.

Sequence for foreskin inspection during male GU exam

Retract foreskin to inspect glans and meatus, then always replace foreskin immediately before proceeding.

Step-by-step technique for testicular palpation

Palpate each testicle between thumb and first two fingers, assessing firmness, symmetry, and presence of masses.

Palpation sequence from epididymis to spermatic cord

Begin at epididymis on posterior testicle, then palpate upward along spermatic cord to external inguinal ring.

Diagnostic mechanism of scrotal transillumination

Light passes through fluid-filled structures (hydrocele), while solid masses or normal testes block light transmission.

Procedure for inguinal hernia palpation

Insert gloved finger into inguinal canal through external ring and instruct patient to cough or perform Valsalva.

Tactile mechanism distinguishing indirect from direct hernias

Indirect hernias touch the tip of the examining finger; direct hernias touch the side of the finger.

Mechanism of hernia strangulation

Nonreducible tissue protrusion leads to compromised blood supply, causing ischemia and requiring prompt surgical intervention.

Procedure and physiological mechanism of cremasteric reflex

Stroke inner thigh with a blunt instrument; ipsilateral cremaster muscle contracts, elevating testicle and scrotum.

Anatomical path of the vas deferens through the groin

Travels from epididymis up spermatic cord, entering external inguinal ring and passing through internal ring via inguinal canal.

Step-by-step physiological progression of Tanner Stage 2

Testes/scrotum begin enlarging with scrotal skin reddening, minimal penile enlargement, and initial straight dark pubic hair at base.

Step-by-step physiological progression of Tanner Stage 3

Testes/scrotum enlarge further, penis lengthens significantly, and pubic hair becomes darker, coarser, and curly.

Step-by-step physiological progression of Tanner Stage 4

Penis grows in length and diameter with glans development, testes reach near-adult size, and pubic hair darkens without thigh spread.

Step-by-step physiological progression of Tanner Stage 5

Penis, testes, and scrotum reach full adult size and shape, with pubic hair spreading to medial thighs.

Pathophysiologic mechanism of Paraphimosis progression

Retracted foreskin behind glans creates constrictive band, causing venous congestion, edema, glans ischemia, and blue discoloration.

Mechanism differentiating physiologic from pathologic phimosis

Physiologic phimosis stems from congenital adhesions that resolve over time; pathologic phimosis results from fibrotic tissue scarring.

Developmental mechanism of Hypospadias

Congenital failure of urethral fold closure, causing urethral meatus to open on ventral surface of penis.

Pathophysiologic mechanism of Peyronie disease

Fibrous plaque develops within corpus cavernosum, causing penile curvature or indentation during erection.

Fluid accumulation mechanism in Hydrocele

Serous fluid collects between parietal and visceral layers of tunica vaginalis surrounding testicle.

Pathophysiologic mechanism of Varicocele formation

Incompetent valves cause tortuosity and dilation of pampiniform plexus veins within spermatic cord.

Positional diagnostic mechanism for primary vs secondary varicocele

Primary varicocele decompresses and disappears when supine; secondary varicocele remains unchanged in supine position.

Pathophysiologic mechanism of Testicular Torsion

Testis twists on spermatic cord, occluding venous and arterial blood supply and causing rapid testicular ischemia.

Mechanism of Cremasteric reflex loss in testicular torsion

Ischemia and mechanical twisting of spermatic cord disrupt reflex arc, causing absence of cremasteric response.

Anatomical displacement mechanism in testicular torsion

Spermatic cord shortening causes testicle to become high-riding with horizontal lie and anteriorly rotated epididymis.

Physical exam procedure for femoral hernia detection

Inspect and palpate anterior thigh region over femoral canal while patient stands and performs Valsalva maneuver.

Pathophysiologic mechanism of direct inguinal hernia

Acquired weakness in posterior wall of inguinal canal causes tissue to bulge directly forward through Hesselbach triangle.

Pathophysiologic mechanism of indirect inguinal hernia

Persistent patent processus vaginalis allows bowel or tissue to pass through internal inguinal ring into inguinal canal.

Clinical Maneuver: Cremasteric Reflex Test

Stroke inner thigh with a blunt instrument; normal result is elevation of testicle and scrotum on stroked side.

Clinical Case: Scrotal "Bag of Worms"

Soft mass superior to testicle feeling like a "bag of worms" that worsens standing indicates a varicocele.

Physical Exam: Primary vs. Secondary Varicocele

Primary varicocele decompresses/disappears when supine; secondary varicocele shows no change with position changes.

Physical Exam: Inguinal Hernia Inspection & Palpation

Inspect groin standing; palpate inguinal canal while patient performs a Valsalva maneuver or coughs.

Hernia Exam: Tip of Finger Touch

A herniating bulge touching the tip of the examining finger in the canal indicates an indirect inguinal hernia.

Hernia Exam: Side of Finger Touch

A herniating bulge touching the side of the examining finger in the canal indicates a direct inguinal hernia.

Special Test: Transillumination of Scrotal Mass

Fluid-filled hydrocele lights up (transilluminates); solid testicular mass or large testicle does not transilluminate.

Clinical Emergency: Testicular Torsion Findings

High-riding testicle with horizontal lie, anterior epididymis, severe acute pain, and absent cremasteric reflex.

Clinical Rule: Prepuce Retraction Step

Always replace (reduce) retracted foreskin over glans immediately after exam to prevent paraphimosis.

Clinical Manifestation: Paraphimosis Presentation

Painful swelling, glans edema, constrictive preputial band, and potential blue/black ischemic glans discoloration.

Clinical Manifestation: Pathologic Phimosis Cause

Inability to retract foreskin due to preputial scarring from prior trauma, inflammation, or recurrent infection.

Clinical Presentation: Syphilitic Chancre

Presents as a single, firm, typically painless ulceration on penile skin during primary syphilis.

Clinical Differentiation: Genital Herpes vs. Chancre

Genital herpes causes painful fluid-filled vesicles/ulcers (HSV-2); syphilitic chancres are characteristically painless.

Clinical Finding: Condyloma Acuminata Inspection

Presents as verrucous, genital wart-like lesions on penile mucosa or skin caused by HPV.

Clinical Finding: Peyronie Disease Manifestation

Fibrous plaque in corpus cavernosum causing pain, curvature, or indentation of penis during erection.

Clinical Findings: Klinefelter Syndrome Physical Phenotype

Tall stature, gynecomastia, decreased muscle tone, small testes, and lower IQ associated with XXY genotype.

Palpation Finding: Spermatocele Location

Painless, mobile, transilluminating cystic mass located on the epididymis, separate from main testicle.

Clinical Significance: Varicocele and Fertility

Varicocele is recognized as the most common surgically correctable cause of male infertility.

Clinical Context: Newborn Hydrocele Course

Common cause of painless scrotal swelling in newborns; majority resolve spontaneously by age 2.