Ewing's sarcoma staging

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Ewing's sarcoma Microchapters

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1];Associate Editor(s)-in-Chief: Suveenkrishna Pothuru, M.B,B.S. [2];Assistant Editor(s)-In-Chief: Michael Maddaleni, B.S.

Overview

Ewing's sarcoma staging

Primary tumor (T)
Stage Finding
Spine Pelvis Appendicular skeleton, trunk, skull, and facial bones
Tx
  • Cannot be assessed
  • Cannot be assessed
  • Cannot be assessed
T0
  • No evidence of primary tumor
  • No evidence of primary tumor
  • No evidence of primary tumor
T1
  • Confined to one vertebral segment or two adjacent vertebral segments
  • Confined to one pelvic segment with no extraosseous extension
  • Tumor ≤8 cm in greatest dimension
T2
  • Confined to three adjacent vertebral segments
  • Confined to one pelvic segment with extraosseous extension or two segments without extraosseous extension
  • Tumor >8 cm in greatest dimension
T3
  • Confined to four or more adjacent vertebral segments, or any nonadjacent vertebral segments
  • Spanning two pelvic segments with extraosseous extension
  • Discontinuous tumors in the primary bone site
T4
  • Extension into the spinal canal or great vessels
  • Spanning three pelvic segments or crossing the sacroiliac joint
_
Regional lymph nodes (N)
Stage Finding
Nx
  • cannot be assessed
N0
  • No regional lymph node metastasis
N1
  • Regional lymph node metastasis
Distant metastasis (M)
Stage Finding
M0
  • No distant metastasis
M1
  • Distant metastasis
M1a
  • Distant metastasis to lung
M1b
  • Distant metastasis to bone or other distant sites
Histologic grade (G)
Stage Finding
Gx
  • cannot be assessed
G1
  • Low grade
G2
  • High grade (moderately differentiated)
G3
  • High grade (poorly differentiated)

References


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