A 33-year-old man diagnosed with KS and with a history of bilateral sinusitis, bronchiectasis and retinal detachment of the right eye consulted for testicular enlargement and induration. The patient reported no other accompanying symptoms except lumbar pain radiating to the left testicle. Examination revealed an increase in testicular volume, painless and with a stony consistency suggestive of neoplasia. No lymph nodes were palpable.

The ultrasound showed signs compatible with a seminoma-type testicular tumour with no locoregional lymph nodes. Chest X-ray showed situs inversus, evidenced by the apex of the cardiac silhouette and the gastric gas chamber to the right and some scarring with probable bronchiectasis in the left lower lobe.

Laboratory tests showed LDH: 340 (230-460); GOT: 44 (2-37); GPT: 44 (2-40). Tumour markers: a-fetoprotein: 1.1 ng/ml (1-7) and b-HCG <5.0 mIU/ml.
Inguinal orchiectomy was performed under spinal anaesthesia at L3-L4 level with hyperbaric bupivacaine and testicular prosthesis was placed.
The anatomopathological result was a classic seminoma of 2.5 cms in diameter that affected the albuginea (without exceeding it) and respected the epididymis, the rete testis, the spermatic cord and the surgical edges. There is no evidence of vascular invasion. Intratubular germinal neoplasia. Fibrosis and tubular hyalinisation of the non-tumour testicle.
With the diagnosis of grade I seminoma without poor prognosis criteria and in agreement with the Oncology Department, it was decided not to apply additional treatment, observing after one year of follow-up normal biochemical normality of the tumour parameters and with negative physical examination and imaging tests. After orchiectomy, two spermiograms were performed, both of which showed azoospermia.

