Fibromatous periorchitis.

We report a case of diffuse fibrous pseudotumour/fibromatous periorchitis, in a 43 year old male, that completely encased the right testis and was adjacent to a hydrocoele cavity. Although fibrous pseudotumours of this region are uncommon, they are reported to be the second most common benign paratesticular lesion after adenomatoid tumours. These comprise approximately 6 percent of paratesticular lesions, and are accepted as reactive lesions secondary to trauma, hydrocoele, infections or inflammation. Fibrous pseudotumours have a peak incidence in the third decade of life but can occur at any age. Clinically these lesions mimic malignancy resulting in the treatment by radical orchidectomy. Fibrous pseudotumours should be considered in differential diagnosis when one encounters a predominantly fibrocollagenous lesion.