DOI: 10.36347/sjmcr.2023.v11i04.041

Pages: 579-581

Introduction: Synovialosarcoma is a mesenchymal tumor that usually affects the soft parts of the lower limbs, especially in the knee or ankle region, in adolescents or young adults. Much more rarely, it is observed in the retrovesical region. Objective: The aim of our work is to illustrate and show the primordial interest of imaging in the positive diagnosis and follow-up of this pathology. Case Report: This is a 13-year-old patient, with no pathological history, who presented for 9 months a urinary obstructive and irritative syndrome, complicated by acute retention of urine. Pelvic ultrasound showed a midline, rounded pelvic mass measuring 8x9 cm isoechoic, with areas of cystization, infiltrating the bladder base and the prostate. Abdominal-pelvic CT scan with and without injection of contrast product revealed a bulky retrovesical mass, roughly rounded, hypodense, of homogeneous tissue density, discreetly enhanced after injection of contrast product. The histological and immuno-histo-chemical study of the biopsy revealed a Synovialosarcoma. The recommended treatment was primary chemotherapy. Conclusion: Imaging is essential to guide the diagnosis, establish prognostic criteria and ensure post-therapeutic follow-up.