Module 5 Flashcards
5α-DHT
that triggers pubertal growth of the male genitalia
FSH regulates(male)
sperm production by the germ cells
2 types of stimuli that trigger erection
Visual, auditory, and erotic cues trigger sympathetic outflow from higher brain centers to the T11 through L2 levels of the spinal cord.
Tactile stimulation initiates sensory impulses from the genitalia to the S2 to S4 reflex arcs and the parasympathetic pathways through the pudendal nerve.
yellow penile discharge seen in
gonnorhea
white penile discharge seen in
nongonococcal urethritis from Chlamydia
intense pruritius in groin
suspect scabies or pubic lice
Smegma
, a cheesy, whitish material, may accumulate normally under the foreskin
Phimosis
is a tight prepuce that cannot be retracted over the glans
Paraphimosis
is a tight prepuce that, once retracted, cannot be returned. Edema ensues.
Balanitis
is inflammation of the glans;
balanoposthitis
is inflammation of the glans and prepuce
cryptorchidism
(an undescended testicle).
testicular cancer
painless nodule
peak incidence between 15-34 in white males
A bulge near the external inguinal ring suggests a
direct inguinal hernia
A bulge near the internal inguinal ring suggests an .
indirect inguinal hernia
incarcerated hernia
A hernia is incarcerated when its contents cannot be returned to the abdominal cavity.
strangulated hernia
A hernia is strangulated when the blood supply to the entrapped contents is compromised. Suspect strangulation in the presence of tenderness, nausea, and vomiting, and consider surgical intervention
Genital Warts (Condylomata Acuminata)
Appearance: Single or multiple papules or plaques of variable shapes; may be round, acuminate (pointed), or thin and slender. May be raised, flat, or cauliflower-like (verrucous).
Causative organism: HPV, usually subtypes 6, 11; carcinogenic subtypes rare, approximately 5%–10% of all anogenital warts. Incubation: weeks to months; infected contact may have no visible warts.
Can arise on penis, scrotum, groin, thighs, anus; usually asymptomatic, occasionally cause itching and pain.
May disappear without treatment.
Primary Syphilis
Appearance: Small red papule that becomes a chancre, a painless erosion up to 2 cm in diameter. Base of chancre is clean, red, smooth, and glistening; borders are raised and indurated. Chancre heals within 3–8 wks.
Causative organism: Treponema pallidum, a spirochete. Incubation: 9–90 days after exposure.
May develop inguinal lymphadenopathy within 7 days; lymph nodes are rubbery, nontender, mobile.
20–30% of patients develop secondary syphilis while chancre still present (suggests coinfection with HIV).
Distinguish from: genital herpes simplex; chancroid; granuloma inguinale from Klebsiella granulomatis (rare in the United States; four variants, so difficult to identify).
Genital Herpes Simplex
Appearance: Small scattered or grouped vesicles, 1–3 mm in size, on glans or shaft of penis. Appear as erosions if vesicular membrane breaks.
Causative organism: Usually Herpes simplex virus 2 (90%), a double-stranded DNA virus. Incubation: 2–7 days after exposure.
Primary episode may be asymptomatic; recurrence usually less painful, of shorter duration.
Associated with fever, malaise, headache, arthralgias; local pain and edema, lymphadenopathy.
Need to distinguish from genital herpes zoster (usually in older patients with dermatomal distribution) and candidiasis.
Chancroid
Appearance: Red papule or pustule initially, then forms a painful deep ulcer with ragged nonindurated margins; contains necrotic exudate, has a friable base.
Causative organism: Haemophilus ducreyi, an anaerobic bacillus. Incubation: 3–7 days after exposure.
Painful inguinal adenopathy; suppurative buboes in 25% of patients.
Need to distinguish from: primary syphilis; genital herpes simplex; lymphogranuloma venereum, granuloma inguinale from Klebsiella granulomatis (both rare in the United States).
Hypospadias
A congenital displacement of the urethral meatus to the inferior surface of the penis. The meatus may be subcoronal, midshaft, or at the junction of the penis and scrotum (penoscro
Peyronie Disease
Palpable, nontender, hard plaques are found just beneath the skin, usually along the dorsum of the penis. The patient complains of curved, painful erections.
Carcinoma of the Penis
An indurated nodule or ulcer that is usually nontender. Limited almost completely to men who are not circumcised, it may be masked by the prepuce. Any persistent penile sore is suspicious.
Scrotal Edema
Pitting edema may make the scrotal skin taut; seen in heart failure, liver failure, or nephrotic syndrome.
Hydrocele
A nontender, fluid-filled mass within the tunica vaginalis. It transilluminates, and the examining fingers can palpate above the mass within the scrotum.
Cryptorchidism
The testis is atrophied and lies outside the scrotum in the inguinal canal, abdomen, or near the pubic tubercle; it may also be congenitally absent. There is no palpable testis or epididymis in the unfilled scrotum. Cryptorchidism, even with surgical correction, markedly raises the risk of testicular cancer.
Small Testis
In adults, testicular length is usually ≤3.5 cm. Small firm testes usually ≤2 cm suggest Klinefelter syndrome. Small soft testes suggesting atrophy are seen in cirrhosis, myotonic dystrophy, use of estrogens, and hypopituitarism; may also follow severe orchitis.
Acute Orchitis
The testis is acutely inflamed, painful, tender, and swollen. It may be difficult to distinguish from the epididymis. The scrotum may be reddened. Seen in mumps and other viral infections; usually unilateral.
Acute Epididymitis
An acutely inflamed epididymis is indurated, swollen, and notably tender, making it difficult to distinguish from the testis. The scrotum may be reddened and the vas deferens inflamed. Causes include infection from Neisseria gonorrhoeae, Chlamydia trachomatis (younger adults), Escherichia coli, and Pseudomonas (older adults); trauma; and autoimmune disease. Barring urinary symptoms, urinalysis is often negative.
Tuberculous Epididymitis
The chronic inflammation of tuberculosis produces a firm enlargement of the epididymis, which is sometimes tender, with thickening or beading of the vas deferens.
Varicocele of the Spermatic Cord
Varicocele refers to gravity-mediated varicose veins of the spermatic cord, usually found on the left. It feels like a soft “bag of worms” in the spermatic cord above the testis, and if prominent, appears to distort the contours of the scrotal skin. A varicocele collapses in the supine position, so examination should be both supine and standing. If the varicocele does not collapse when the patient is supine, suspect a left spermatic vein obstruction within the abdomen.
Testicular Torsion
Torsion, or twisting, of the testicle on its spermatic cord produces an acutely painful, tender, and swollen organ that is often retracted upward in the scrotum. The cremasteric reflex is nearly always absent on the affected side in boys or men with testicular torsion, though this can be difficult to assess during acute pain episodes. If the presentation is delayed, the scrotum becomes red and edematous. There is no associated urinary infection. Torsion is most common in neonates and adolescents but can occur at any age. It is a surgical emergency because of obstructed circulation and requires urgent surgical consultation.
Indirect Inguinal Hernia characteristics
Most common, all ages and sexes. Often in children; may occur in adults.
Above inguinal ligament, near its midpoint (the internal inguinal ring).
Often into the scrotum.
The hernia comes down the inguinal canal and touches the fingertip.
Direct inguinal hernia characteristics
Less common. Usually in men older than 40 yrs; rare in women.
Above inguinal ligament, close to the pubic tubercle (near the external inguinal ring)
Rarely into the scrotum.
The hernia bulges anteriorly and pushes the side of the finger forward.
Femoral hernia characteristics
Least common. More common in women than in men.
Below the inguinal ligament; appears more lateral than an inguinal hernia. Can be hard to differentiate from lymph nodes.
Never into the scrotum.
The inguinal canal is empty.
vulva composed of
he mons pubis, a hair-covered fat pad overlying the symphysis pubis; the labia majora, rounded folds of adipose tissue forming the outer lips of the vagina; the labia minora, the thinner pinkish-red folds or inner lips that extend anteriorly to form the prepuce; and the clitoris. It also includes the vestibule, the boat-shaped fossa between the labia minora that surrounds the opening of the urethra, the urethral meatus anteriorly and the vaginal opening, the introitus, posteriorly.