1. Introduction: Tumor Classification and Immunohistochemistry 2. Biologic Potential, Grading, Staging, and Reporting of Sarcomas 3. Spindle Cell Tumors of Adults 4. Pediatric Spindle Cell Tumors 5. Tumors with Myxoid Stroma 6. Epithelioid and Epithelial-like Tumors 7. Pleomorphic Sarcomas 8. Round Cell Tumors 9. Biphasic Tumors and Tumors with Mixed Patterns 10. Soft Tissue Tumors with Prominent Inflammatory Cells 11. Giant Cell-Rich Tumors 12. Adipocytic Tumors 13. Vascular Tumors 14. Cartilaginous and Osseous Soft Tissue Tumors 15. Cutaneous Mesenchymal Tumors 16. Mesenchymal Tumors of the Gastrointestinal Tract 17. Lower Genital Soft Tissue Tumors 18. Applications of Molecular Testing to Differential Diagnosis sakriti opis