Primary Bone Tumors: Spine Surgery Live -Video Techniques Mobile Spine

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1 Primary Bone Tumors: Spine Surgery Live -Video Techniques Mobile Spine Christopher Ames MD Professor of Neurosurgery and Orthopedic Surgery Director of Spine Tumor And Deformity Surgery UCSF Department of Neurosurgery Disclosures DePuy Medtronic Stryker Docters Research Group Fish & Richardson StrykerBiomet Spine Consultant Consultant Consultant Stock Shareholder (excluding mutual funds) P.C. Consultant 1

2 Outline Background of Grading and Staging Examples with Treatment Implications (Mobile Spine) Modern Spine Tumor Surgery Metastatic Spine Tumors Primary Spine Tumors 2

3 Primary Tumors Primary tumors rely more on surgical treatment at initial surgery Diagnosis Histology Staging System Oncological Location Surgical Treatment Planning Adjuvant yes/no/pre/post Surgery wide/marginal/intralesional (part/whole) Surgical Technique Histology Chondrogenic Osteogenic Fibrogenic Fibrohistiocytic Osteoclastic GC-rich Vascular Neuro/Ectodermal Notochordal Undefined/Pseudotumoral 3

4 Surgical staging system Stage Definition 1 G0 T0 M0 Benign latent 2 G0 T0 M0 Benign active 3 G0-1 T0-1 M0 Benign aggressive I A G1 T1 M0 Malignant, low grade, intracompartmental I B G1 T2 M0 Malignant, low grade, extracompartmental II A G2 T1 M0 Malignant, high grade, intracompartmental II B G2 T2 M0 Malignant, high grade, extracompartmental III G any T any M1 Malignant, any grade, any extent, distant metastasis Enneking et al,1983 Benign Tumor 1 G0 T0 M0 Latent 2 G0 T0 M0 Active 3 G0 T1/2 M0/1 Aggressive A E D B C 1.Capsule, 2.Pseudocapsule 4

5 Hemangioma Grade 1 Grade 2 Grade 3 5

6 Osteochondroma Low grade Benign Symptomatic Marginal Excision 20 yo f 6

7 Benign Tumor-Osteoid Osteoma Treatment NSAIDS RFA Intralesional curettage Associated scoliosis 13 yo female ABC Modern Tx Serial Embolization Intralesional embolization Intralesional resection Not able to embolize Mechanical Instabiliy Denosumab? 7

8 Posterior resection and reconstruction of C1 lateral mass for ABC 8

9 ABC vs GCT vs Telangiectatic OS Bx - GCT vs ABC Rebx- GCT vs OS 3 months denosumab 30 yo male back pain Indications for En Bloc Resection Curr Opinion Orthopedics

10 GCT Chordoma Semin Spine Surg 21:76-85 Terminology En bloc resections without tumor-free margins Intralesional: The tumor periphery is violated and the tumor is not covered by healthy tissue. Marginal: The pathologist describes histologically a thin layer of healthy muscle, bone, or an endothelial membrane continuously covering the tumor mass Wide: A fascial barrier represents a wide margin 1 cm of muscle or cancellous bone sometimes is not enough and a 2 cm barrier may be required to consider the margin wide. Boriani Seminars in Oncology 10

11 WBB Staging Osteoblastoma Benign Type 3 20% recurrence intralesional En Bloc Excision Associated ABC 11

12 Operative Plan 12

13 13

14 14

15 Giant cell tumor Chondrogenic Osteogenic Fibrogenic Fibrohistiocytic Osteoclastic GC-rich Vascular Neuro/Ectodermal Notochordal Undefined/Pseudotumoral 15

16 Recurrent GCT L1-2 Options? 16

17 17

18 Proportion of Patients (%) Giant cell Tumor (location) Denosumab The efficacy assessment included 49 patients who had the opportunity to be on denosumab treatment for at least 6 months. After 6 months, 47 patients (96%) were free of disease progression based on subjective assessment of disease status No Disease Progression Disease Progression 18

19 Malignant Tumor A E D C B Low grade High grade IA Intra-comp; thin capsule, tumor in pseudocapsule IB Extra-comp (Zone A,D,E) chordoma, chondrosarcoma IIA Intra-comp; tumor in PC, Osteosarcoma, ES IIB Extra-comp (Zone A,D,E) 1.Capsule, 2.Pseudocapsule, 3.Tumor invation to pseudocapsule, 4.Skip metastases 19

20 How to access contralateral nerve root? Lateral retraction of specimen 20

21 21

22 22

23 Chordoma Chondrogenic Osteogenic Fibrogenic Fibrohistiocytic Osteoclastic GC-rich Vascular Neuro/Ectodermal Notochordal Undefined/Pseudotumoral En Bloc Resection Technique Technique 1. Single stage, posterior High to mid thoracic, sacrectomy 2. 2 stage, posterior/anterior Cervical, Lower thoracic, lumbar,? Vessel or large extracompartmental disease 23

24 Tomita Threadwire Saw System Tomita Threadwire Saw System 24

25 First Step-pass wire saw 25

26 Anterior Finger Dissection 26

27 Single stage, posterior High to mid thoracic 27

28 28

29 29

30 Standard 2 stage P/A Chordoma 30

31 31

32 32

33 33

34 Chordoma 5 level 34

35 Spinal Cord Perfusion after Segmental Ligation NEW for Chordoma Combined Hybrid Surgery Preop SRS 2500cGy/5, max tumor 3450cGy 35

36 IVC Filter 3 Stage P/L/R PSF/I T2-T11, posterior osteotomy and nerve sacrifice Left Thoracotomy, aortic dissection, 3.25 level Right Thoracotomy, esophageal dissection, delivery 36

37 37

38 Chordoma (Location) 38

39 Case 4 Spondylectomy Technique En Bloc marginal -contaminated at vertebral a. SAC Preserve Bilateral Transverse Cervical Exposure 39

40 4 rod reconstruction 40

41

42 Chondrosarcoma Chondrogenic Osteogenic Fibrogenic Fibrohistiocytic Osteoclastic GC-rich Vascular Neuro/Ectodermal Notochordal Undefined/Pseudotumoral 42

43 2 Stage A/P Thoracic 270 SpondylectomyChondrosarcoma 2 Stage Thoracic Spondylectomy Chondrosarcoma 43

44 270 degree resection 32 yo male L2-3 chondrosarcoma A/P Needle biospy with chondrosarcoma 44

45 45

46 Osteosarcoma Preoperative adjuvant therapy Response to therapy predictive of outcome Refinement of surgical margins Chondrogenic Osteogenic Fibrogenic Fibrohistiocytic Osteoclastic GC-rich Vascular Neuro/Ectodermal Notochordal Undefined/Pseudotumo ral Ewings Sarcoma Preoperative Adjuvant Therapy Chondrogenic Osteogenic Fibrogenic Fibrohistiocytic Osteoclastic GC-rich Vascular Neuro/Ectodermal Notochordal Undefined/Pseudotumoral 46

47 P32 Brachytherapy Ex: Leiomyosarcoma Adjuvant therapy P32 to margin Dural margin Shape radiation targets for SRS 47

48 P32 Beta emitting radioisotope (1-2 Gy/minute) Embedded in thin plastic polymer Half-life 14 days Conforms to the dura Handled without shielding Custom fit at surgery to the target FDA approved 48

49 Soft Tissue Sarcoma Primary vs Metastatic Bone grafting demand Recurrent CS 5 years later 49

50 Thanks to the Primary Tumor Team! Vedat Deviren Orthopedics Igor Barani Rad Onc Pierre Theodore Thoracic Ivan El Sayed ENT Mika Varma Colorectal Bill Hoffman Plastics Charles Eichler Vascular Rebecca Mustille PT 50

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