1 Metastatic Bone Disease and Multiple Myeloma 16000122-01.

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Presentation transcript:

1 Metastatic Bone Disease and Multiple Myeloma

2 Southwest Spine Institute Douglas S. Won, MD –Spine Surgery Specialist –Director of Southwest Spine Institute –Clinical Asst. Professor, UT Southwestern Medical School –Baylor Spine & Brain Center at Irving –Irving Native, Graduate of MacArthur High

3 Metastases to Bone Metastatic bone carcinoma Originates from other cancers, such as breast, prostate, lung, renal cell, etc.. and spreads to bone Metastatic cancer causes skeletal complications every 3-4 months 1 1 Janjan, N. (2001). "Bone Metastases: Approaches to Management." Seminars in Oncology 28(4):

4 Metastasis Cancer typically spreads to 1:. – Lymphatic system – Lungs – Liver – Skeleton 2  Vertebrae 75%  Pelvis 40%  Femur 25% 1 Levesque, J et al.. A Clinical Guide to Primary Bone Tumors. Baltimore: Williams & Wilkins; Kleerekoper, M et al. (eds.) The Bone and Mineral Manual: A Practical Guide. Academic Press; 1999.

5 Classifications Osteoblastic lesions – Increase bone density – Do not change bone strength – Decrease bone stiffness – Characterized by increased bone formation Example: – Metastatic osteoblastic carcinoma

6 Metastatic Osteoblastic Carcinoma

7 Classifications Osteolytic lesions - Decrease both bone strength and stiffness - Characterized by increased bone resorption, causing swiss cheese type lesions on bone Examples: - Multiple Myeloma - Metastatic osteolytic carcinoma

8 Metastatic Osteolytic Carcinoma

9 Metastases to Bone Cancers that frequently metastasize to the skeleton include 1 : Breast cancer – 75% of cases » 65% of the lesions are lytic 2 Lung cancer – 35% of cases » 80% of the lesions are lytic 2 Kidney cancer – 25% of cases 1Kleerekoper, M. et al (eds.) The Bone and Mineral Manual: A Practical Guide. Academic Press; Mirra, J. Bone Tumors: Clinical, Radiologic, and Pathologic Correlations. Philadelphia: Lea & Febiger; 1989.

10 Metastases to the Vertebrae > 70% of patients who die from cancer have vertebral metastases 1 Lytic destruction of the anterior portion of the vertebral body 1 Lytic lesions are associated with higher fracture risk Metastatic bone disease is painful 2 – Up to 2/3 of patients experience severe pain and disability 1 Harrington, K. (1986). Journal of Bone and Joint Surgery 68-A(7): Janjan, N. (2001). Seminars in Oncology 28(4):

11 Fracture Risk Osteolytic lesions = higher fracture rate Fracture probability increases with the duration of metastatic involvement 1 Certain cancers almost always metastasize with osteolytic lesions 2 1Coleman, R. (2001). Cancer Treatment Reviews 27: Mirra, J. Bone Tumors: Clinical, Radiologic, and Pathologic Correlations. Philadelphia: Lea & Febiger; 1989.

12 CG Biomechanics of Pathologic Spine Fractures Center of gravity (CG) moves forward Large bending moment created Posterior muscles and ligaments must counterbalance increased bending Anterior spine must resist larger compressive stresses White III and Panjabi 1990

13 Radiation Therapy May leave bone unstable Radiation may increase risk of fracture 1 – Up to 41% of patients who undergo radiation experience bone fractures Cannot correct an anatomic abnormality such as a fracture 2 1 Patel, B. and H. DeGroot III (2001). Orthopedics 24(6): Janjan, N. (2001). Seminars in Oncology 28(4):

14 Fracture Treatment Pain is due to spinal instability – radiotherapy or systemic treatment will not relieve the pain 1 Stabilization is required for pain relief 1 Spinal cord involvement and neurologic deficit possible if not stabilized 2 1Coleman, R. (2001). Cancer Treatment Reviews 27: Harrington, K. (1986). Journal of Bone and Joint Surgery 68-A(7):

15 Multiple Myeloma Myeloma cells Picture courtesy of the International Myeloma Foundation

16 Multiple Myeloma Cancer of the bone marrow 75,000 – 100,000 patients in the US at any one time Over 13,500 new cases diagnosed each year in the US Male to female ratio is 3:2 Trend towards patients under the age of 55 From “Multiple Myeloma: Cancer of the Bone Marrow.” International Myeloma Foundation, 2001 edition.

17 Multiple Myeloma Disruption of bone marrow function Suppression of immune function Osteoclasts activated Osteoblasts inhibited Hallmark is osteolytic lesions Picture courtesy of the International Myeloma Foundation

18 Common Sites for Bone Involvement  Skull  Spine  Pelvis  Long bones Picture courtesy of the International Myeloma Foundation

19 T-10 fracture due to multiple myeloma Photo courtesy of Steve James, M.D.

20 T2 weighted MRI showing myeloma related fracture at L3 and L4

21 Vertebral Body Compression Fracture Treatment Options

22 ORTHOPEDIC FRACTURE CARE Why have we been content to leave the spine in a physiologically and biomechanically compromised condition?

23 Fracture Treatment Objectives Four AO principles 1  Fracture reduction and fixation to restore anatomical relationships  Stability by fixation or splintage, as the nature of the fracture and the injury requires  Preservation of blood supply to soft tissues and bone by careful handling and gentle reduction techniques  Early and safe mobilization of the part and the patient *Arbeitsgemeinschaft Osteosynthesefragen (English translation: Association for the Study of Internal Fixation - ASIF) 1 Ruedi & Murphy, AO Principles of Fracture Management, Thieme, Stuttgart, New York, 2000

24 Vertebral Body Compression Fracture (VCF) Normal Fractured Wedge- shaped Depressed endplate(s) Spine shorter, tilted forward

25 Deformity Progression Aug 31, 2000 Sept 3, 2000 Lieberman et al., Spine º kyphosis 25º kyphosis

26 VCF Treatment Options Medical Management n Treatment Protocol –Bed rest –Narcotic analgesics –Braces n Shortcomings –May fail to relieve pain –Does not provide long-term functional improvement –May exacerbate bone loss –Does not attempt to restore the anatomy

27 VCF Treatment Options Open Surgical Treatment n Indication –Only if neurologic deficit (very rare, only 0.05%) –Instrumented fusion, anterior or posterior n Shortcomings –Invasive –Poor outcomes in osteopenic bone

28 VCF Treatment Options Vertebroplasty n Designed to stabilize painful VCFs n Shortcomings –Risk of filler leaks (27-74% reported 1,2,4,5,6,7,8,9,10 ) –High pressure injection –Uncontrolled fill –High complication rate (1-20% reported 3,4,5 ) –Freezes spinal deformity –Does not reduce fracture or restore anatomy –Not designed to reposition bone 1 Cortet et al., J Rheum Jensen et al., AJNR Grados et al., Rheumatology Alvarez et al., Eurospine Cotten et al. Radiology Peh et al., Radiology Padovani et al., AJNR Gaughen et al., AJNR Ryu et al., J Neurosurgery Weill et al., Radiology 1996

29 Why Fracture Reduction? What is orthopedic reduction? –The restoration, by surgical or manipulative procedures, of a part to its normal anatomical relation 1 What is the goal? –To produce optimal outcomes with early diagnosis and treatment 2 –To accommodate the frail physical status and co- morbidities of geriatric patients 2 1 Stedman’s Concise Medical Dictionary Williams and Wilkins. 2 Brakoniecki, Anesthetic Management of the Trauma Patient with Skeletal Injuries, Skeletal Trauma, W.B. Saunders Company, 1998, 1:7:

30 New VCF Treatment Option Minimally Invasive Fracture Reduction

31 Minimally Invasive Fracture Reduction KyphX® Inflatable Bone Tamp (IBT) For use as a conventional bone tamp for the reduction of fractures and/or creation of a void in cancellous bone in the spine, hand, tibia, radius and calcaneus.

32 Allows precise, minimally invasive access to the vertebral body and provides a working channel KyphX ® Introducer Tool Kit

33 KyphX ® IBT Inflation Reduces the fracture, compacts the bone, and may elevate the endplates

34 Leaves a defined cavity within the vertebral body KyphX ® IBT Removal

35 Minimally Invasive Fracture Reduction Clinical Experience  Over 3 years of orthopedic fracture reduction  As of June 30, 2002  Fractures reduced > 22,000  Patients > 17,000

36 Minimally Invasive Fracture Reduction KyphX ® Inflatable Bone Tamp has been developed for patients with symptomatic VCFs

37 Possible causes of VCFs  Primary osteoporosis  Secondary osteoporosis –Drug-induced (corticosteroids, tobacco, barbituates, heparin) –Endocrine (hyperparathyroidism, diabetes) –Miscellaneous (renal failure, COPD, rheumatoid arthritits, hepatic disease or transplant) Merck Manual, 16 th ed., 1992

38 Possible causes of VCFs  Osteolytic lesions –Multiple Myeloma –Bone metastases –Paget’s disease Trauma –½ of all trauma cases are misclassified

39 Summary n The general goal for fracture treatment is restoration of anatomy and early return to function n Conventional therapy not always effective n KyphX ® IBT is a new option for VCFs designed to:  reduce the fracture  move cancellous bone (elevate endplates)  create void inside vertebral body n As with hip fracture surgery, early diagnosis and intervention are important for fracture reduction

40 Case Study Patient:55 YO Male Diagnosis:Multiple Myeloma Fracture Reduced:L-1, 3 day old

41 Case Study Patient:61 YO Female Diagnosis:Multiple Myeloma Fracture Reduced:T11-L2, 1 ½ yrs old

42 Case Study Patient:61 YO Male Diagnosis:Multiple Myeloma Fracture Reduced:T-11, 5 weeks o

43 Southwest Spine Institute 2120 N. MacArthur Blvd Irving 2200 Morriss Rd. #100 Flower Mound 200 Pecan Creek Dr., Southlake www.SwSpineInst.com

44 Thank you!