Inclusion Criteria:  General Inclusion Criteria  Skeletally mature adult males and females (closed epiphyseal plates) 21 years of age or older.  Impending or actual non-displaced or minimally displaced pathological fracture of the pelvis, secondary to metastatic bone disease. Fractures will be classified by region (acetabulum, ilium, ischium, sacrum, and pubis). According to the region, different criteria for inclusion will be applied.  Displacement will be classified in the:  acetabulum as less than 2mm iliac bone as less than 1cm ischium as less than 1cm sacrum as less than 2mm pubic bone as less than 2cm Females: neither pregnant nor intending to become pregnant during the course of the study will be enrolled in the study. Women defined as follows will be eligible for enrollment: a. Postmenopausal for at least 1 year OR b. Documented oophorectomy or hysterectomy c. Surgically sterile d. If of childbearing potential, must be practicing double-barrier method of birth control, be willing to avoid pregnancy for the period of study participation and have a negative pregnancy test at screening Patient, or his/her legally authorized representative, is able to understand and provide informed consent. Willing and able to comply with post-operative treatment protocol and follow-up visit schedule.  VAS Pain Score ≥ 30mm on 100mm scale  OR  Geriatric patients (aged 65 or older) Fragility fractures of the pelvis, specifically a pathologic fracture, or osteoporotic fracture that results from minimal trauma (i.e. fall from standing height)  Fractures will be classified and marked as eligible by displacement in a particular region (acetabulum, ilium, ischium, sacrum, and pubis). According to the region, different criteria for inclusion will be applied.  Displacement will be classified in the:  acetabulum as less than 2mm ischium as less than 1cm sacrum as less than 2mm  pubic bone as less than 2cm  3. Patient, or his/her legally authorized representative, is able to understand and provide informed consent.  4. Willing and able to comply with post-operative treatment protocol and follow-up visit schedule.  5. Fracture is closed  Impending Fracture-Specific Inclusion Criteria  7. Documented presence of at least one metastatic lesion of the pelvis.  8. Lytic or mixed matrix lesion, measuring at least 3 cm in size in an area at risk of pathologic fracture and causing mechanical pain with axial loading of the affected site. (There is no Mirels for pelvis).  9. Non-displaced or minimally displaced pathologic fractures of the pubic bone, iliac bone, acetabulum and/or ischium, causing mechanical pain on axial loading of the affected site.  Actual Fracture-Specific Inclusion Criteria 10. Fracture is closed, Gustilo Type I or II open fractures  Exclusion Criteria:  - General Exclusion Criteria  Primary tumor (osteogenic origin, etc.) at site. Impending or actual fracture at any other location, that in the Investigator's opinion, would preclude ability to assess pain and/or function in the target pelvis Active or incompletely treated infections that could involve the device implant site. Distant foci of infection that may spread to the implant site. Allergy to implant materials or dental glue. In the Investigator's judgment, functional deficit in the target pelvis with an etiology other than bone metastases (e.g. due to avascular bone necrosis). In the Investigator's judgment, focal neurologic deficit as a result of metastases in the brain, spine, or other central nervous system disorders. Uncooperative patients, or patients who are incapable of following directions (for example, as a consequence of a neurological or psychiatric disorder). Prisoner. Life expectancy less than three months. Any intra-articular displacement larger than 3 mm in the fracture site. Open fractures Patients whose intramedullary region at site of fracture measures smaller than the diameter of the sheath provided.  Impending Fracture-Specific Exclusion Criteria  10. Lytic or mixed matrix lesion, measuring at less than 3 cm in size or less than 30 cm in an area at risk of pathologic fracture and causing mechanical pain with axial loading of the affected site.  11. Destruction of cortical bone at impending fracture site < 50%.  12. Any intra-articular displacement larger than 3 mm in the fracture site.  Actual Fracture-Specific Exclusion Criteria  14. Open fractures with severe contamination.  15. Patients whose intramedullary region at site of fracture or impending fracture that measures smaller than the diameter of the sheath provided.