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ORCHITIS AND EPIDIDYMITIS
Orchitis
Orchitis is an inflammatory lesion of the testicle associated with a predominantly leukocytic exsudate inside and outside the seminiferous tubules resulting in tubular sclerosis. The inflammation causes pain and swelling. Chronic inflammatory changes in the seminiferous tubules disrupt the normal process of spermatogenesis and cause alterations both in sperm number and quality [1].
It is generally accepted that orchitis may also be an important cause of spermatogenetic arrest [2], which may be reversible. Following orchitis, testicle atrophy occurs [2].
Orchitis is classified according to aetiology (Table 15).
Table 15. Classification of epididymo-orchitis [3]
Non-specific
Specific
Viral
Acute bacterial epididymo-orchitis:
Specific granulomatous orchitis
Mumps orchitis
N. gonorrhoeae
Tuberculosis
Coxsackie-B
C. trachomatis
Lues
E. coli (and other Enterobacteriaceae)
Brucellosis
Non-specific chronic epididymo-orchitis
Granulomatous (idiopathic) orchitis
Pneumococcus
Salmonella
Klebsiella
Haemophilus influenzae
Diagnosis
Patients with epididymo-orchitis usually present with unilateral scrotal pain [4]. The diagnosis is based on medical history and palpation. Ultrasonography demonstrates a swollen, enlarged testis. The sonographic feature of the tissue does not allow any differential diagnosis [5].
Ejaculate analysis
Ejaculate analysis, including leukocyte analysis, indicates persistent inflammatory activity (see above Androlo-gical investigations and spermatology). In many cases, especially in acute epididymo-orchitis, transiently decreased sperm counts and reduced forward motility are observed [2]. Obstructive azoospermia due to complete obstruction is a rare complication. Mumps orchitis may result in bilateral testicular atrophy [3] and testicular azoospermia. When granulomatous orchitis is suspected, sperm-bound autoantibodies occur (see above Andrological investigations and spermatology).
Therapy
Only the therapy of acute bacterial epididymo-orchitis and of specific granulomatous orchitis is standardized [3] (Table 16).
Several regimens are thought to improve the inflammatory lesion. Therapies with corticoids and non-steroidal antiphlogistic substances, such as diclofenac, indometacin and acetylsalicylic acid, have unfortunately not been evaluated as to their andrological outcome [5]. A further therapeutic trial is based on the idea of preventing deleterious effects of inflammation on spermatogenesis by gonadotrophin-releasing hormone (GnRH) treatment [6].
In mumps orchitis, systemic interferon alpha-2b therapy has been reported to prevent testicular atrophy and azoospermia [7]. In idiopathic granulomatous orchitis, surgical removal of the testis is the therapy of choice.