Weinerber et al classified edema of the male genitalia based on the duration of clinical findings. The authors are from the University of Pittsburgh.
Clinical features: genital edema with pain
Duration of edema: hours to a few weeks
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Clinical Findings
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Possible Cause
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ecchymosis
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hematocele or hematoma (trauma, bleeding disorder, etc)
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prolonged erection
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priapism
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erythema and history of viral infection
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viral orchitis
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erythema with tenderness and/or induration
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epididymitis or epididiymo-orchitis
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sudden onset with absent blood flow to testis on Doppler ultrasound
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torsion of the testis
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sudden onset with abdominal pain and vomiting with normal testicular blood flow on Doppler ultrasound
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incarcerated hernia
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Additional diagnoses to consider:
(1) thermal or chemical burn
(2) venomous bite
(3) cellulitis, including Fournier's gangrene
