<prompt> The prognosis of rhabdomyosarcoma is likely to be poor if the site of the tumour is:OrbitExtremityPara testicularUrinary bladder  <response>: The prognosis of rhabdomyosarcoma is likely to be poor if it involves the extremity. Extremity rhabdomyosarcomas in adolescents and young adults usually have alveolar histologic characteristics and carry a worse prognosis. Other poor prognostic factors associated with it includes age less than 1 and more than 10 years, alveolar histology, unorable primary size, size greater than 5cm and higher clinical group. Ref: CURRENT Diagnosis and Treatment: Surgery, 13th Edition, Chapter 43; Radiation Oncology: Management Decisions By K. S. Clifford Chao, 3rd Edition, Page 755; Kelleys Essentials of Internal Medicine By H. David Humes, 2nd Edition, Page 445. 