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Updated: Feb 1, 2026
05:24
Teratoma Generation in the Testis Capsule
Published on: November 7, 2011
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[Myeloid Sarcoma of the Testis].
Kenta Yoshida1, Koichi Uemura1, Masahiro Inoue1
1The Department of Urology, Yokohama City Minato Red Cross Hospital.
Hinyokika Kiyo. Acta Urologica Japonica
|December 14, 2018
Summary
A rare case of myeloid sarcoma, an extramedullary tumor of immature myeloid cells, was diagnosed in a 68-year-old man presenting with testicular swelling. This condition, though uncommon in the testis, carries a poor prognosis and requires consideration in differential diagnoses.
Area of Science:
- Oncology
- Hematology
Background:
- Myeloid sarcoma is an extramedullary tumor composed of immature myeloid cells.
- Primary testicular involvement by myeloid sarcoma is a rare clinical presentation.
Observation:
- A 68-year-old man presented with a 40 mm testicular mass, diagnosed as myeloid sarcoma via orchiectomy and immunohistochemistry (myeloperoxidase positive, T-cell/B-cell negative).
- No evidence of leukemia was found in peripheral blood or bone marrow at diagnosis.
Findings:
- The patient developed para-aortic lymph node enlargement 11 months post-orchiectomy, indicating recurrence.
- Chemotherapy was initiated for the recurrent myeloid sarcoma.
Implications:
- Testicular myeloid sarcoma, despite its rarity, is a critical differential diagnosis for testicular masses.
- Early recognition and management are crucial due to the typically poor prognosis associated with this condition.
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