[Solitary fibrous tumour of the testes (SFT)]. / Solitärer fibröser Tumor des Hodens (SFT).

INTRODUCTION: Testicular masses in adults are most likely seminomatous or non-seminomatous germ cell tumours. Paratesticular tumours are far less frequent. Most lesions within this category are variants of fibrous pseudotumours. Solitary fibrous tumours (SFT) with characteristic (hemangiopericytoma-like) vascular structures are rare neoplasms that in the vast majority arise in the pleura, although extrapleural localisations in virtually every organ have been reported. CASE REPORT: A 64-year-old male nursing case was presented with a testicular swelling on the left side and recurrent testicular pain. Physical examination revealed a distinct mass at the left spermatic cord. The tumour marker levels were normal. The patient's history included an HIV infection as well as neurosyphilis. The sonographic examination showed a heterogeneous and hyperperfused tumour, MRI examination a 3.2 x 4.3 cm measuring heterogeneous tumour above the left epididymis. An inguinal orchiectomy was performed due to the unclear dignity. The histological examination revealed a solitary fibrous tumour. CONCLUSIONS: In cases of paratesticular tumours, rare tumours like solitary fibrous tumours have to be considered. Certainty regarding the dignity of the tumour can only be achieved by surgical exposure and excision.