Genitourinary Disease and STDs Flashcards
PENILE DISORDERS:
Malformations
The most common malformations include
abnormalities in the location of the distal urethral orifice.
PENILE DISORDERS:
Hypospadias refers to an
abnormal opening of the urethra along the ventral aspect of the penis, and occurs in 1/300 live male births. The opening may be restricted and lead to an increased risk of urinary tract infections.
PENILE DISORDERS:
Epispadias refers to the
urethral opening on the dorsal aspect of the penis. This abnormality is less common, but also exhibits an increased prevalence of urinary tract infections in addition to predisposition to urinary incontinence.
Premalignant Lesions
Premalignant lesions of the penis appear as
white plaque-like thickenings, areas of redness or a mixture.
Premalignant lesions:
Histologically, they may reveal any level of
epithelial dysplasia, including carcinoma in situ.
Bowen disease is a synonym for
carcinoma in situ of the penis.
Bowen disease is not specific to the
penis but may occur on other cutaneous or mucosal surfaces. Its major clinical importance lies in the potential progression to invasive squamous cell carcinoma.
Carcinoma of the Penis
Squamous cell carcinoma of the penis accounts for
about 0.4% of cancer in males.
Squamous cell carcinoma and its precursor lesions are the
most common penile neoplasms. The lesion is extremely rare among men who are circumcised early in life.
Human papillomavirus (HPV 16/18) may be involved with development of
penile cancer, and circumcision may improve hygiene and lessen exposure to oncogenic viruses.
Penile cancer:
This cancer tends to arise in those over
40 and may be preceded by Bowen’s disease.
Penile cancer:
Normally, it begins as a
crusted plaque or nodule with irregular margins that usually develops a central ulceration.
Penile cancer:
Less frequently, it forms a
papillary mass.
Penile cancer:
Treatment is
surgical excision. 5-year survival is 66%. Widespread metastasis is rare; however local metastasis to inguinal lymph nodes reduces 5-yr survival to 27%.
DISORDERS OF THE SCROTUM
- Inflammatory processes, fungal infections, dermatoses
- Rare neoplasms; most squamous cell carcinoma
- 1st human cancer associated with occupational (environmental) factors (chimney sweeps)
Cryptorchidism refers to
failure of testicular descent from the abdomen to the scrotum.
Normally, the testes descend from the body cavity into the pelvis by the
third month of gestation and into the scrotum during the last two months of intrauterine life.
Cryptorchidism:
The diagnosis cannot be confirmed until
1 year of age because the timing of completion of the descent is variable.
Cryptorchidism is present
in
1% of the male population and may be unilateral or bilateral (10%).
Cryptorchidism:
Untreated bilateral cryptorchidism results in
sterility.
Cryptorchidism:
In unilateral cases, the contralateral descended testis may undergo
atrophy, also leading to sterility.
Cryptorchidism:
Failure of descent also is associated with a
3-5 times increased risk of testicular malignancy manifesting as intratubular germ cell neoplasia developing within the atrophic tubules.
Cryptochidism:
Surgical placement of
the testes into the scrotum (orchiopexy) before puberty reduces but does not eliminate the risk of cancer and infertility.
Orchitis refers to
inflammation of the testes.