Suburethral Diverticulum

The etiology of urethral diverticulum is unknown (Fig. 44). Although postulated to occur as a result of childbirth trauma, they occur in nulliparous women as well. One theory is that they result from infection of Skene's glands, and frequent catheterizations have also been proposed as an etiology (84). Urethral diverticuli are most common in the third to fifth decade (84). They may be difficult to diagnose (84), but may cause significant symptomatology. Occasionally calculi may form because of urinary stasis (85). Histologically, they are usually composed of fibroconnective tissue. Often, an epithelial lining is not present, but may be squamous or transitional (Table 44) (76).

Table 41 Urethral Caruncle

Clinical

Differential

Diagnosis

Symptoms

appearance

diagnosis

Therapy

Urethral

None, or pain,

Small polypoid

Urethral prolapse,

None may be required.

caruncle

bleeding,

fleshy lesion

urethral

Topical estrogen.

discharge,

at the

carcinoma,

Surgery or

hematuria

urethral

urethral

electrocautery rarely

meatus

condyloma

needed

Figure 42 Malacoplakia: a characteristic Michaelis-Guttman body is seen in the center of the picture.

Urinary Meatus Irritation
Figure 43 Skene's (paraurethral) cyst: the cyst wall is lined by transitional epithelium.
Table 42 Malacoplakia of the Urethra

Clinical

Differential

Diagnosis

Symptoms

appearance

diagnosis

Therapy

Urethral

None, may

May have a

Other urethral lesions

Excision

malacoplakia

have

mass

including polypoid

hematuria

lesions, prolapse

Suburethral Diverticulum
Figure 44 Suburethral diverticulum: the wall of the diverticulum shows marked inflammation.
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Responses

  • heribald smallburrow
    How often does a urethral diverticulum result in cancer?
    8 months ago

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