UICC 8 th Edition Errata 25 th of May 2018

Similar documents
UICC TNM 8 th Edition Errata

UICC TNM 8 th Edition Errata

UICC 8th Edition Errata 28 th of January 2019

Staging and Treatment Update for Gynecologic Malignancies

Prognostic factors of genitourinary tumors: Do we have to care?

LUNG STAGING FORM LATERALITY: LEFT RIGHT BILATERAL

AJCC 7th Edition Handbook Errata as of 9/21/10

AJCC Staging of Head & Neck Cancer (7 th edition, 2010) -LIP & ORAL CAVITY-

The pathology of bladder cancer

TNM Classification of Malignant Tumours 8 th edition

C ORPUS UTERI C ARCINOMA STAGING FORM (Carcinosarcomas should be staged as carcinomas)

Gastric Cancer Histopathology Reporting Proforma

Gastric Cancer Staging AJCC eighth edition. Duncan McLeod Westmead Hospital, NSW

Greater Manchester & Cheshire Guidelines for Pathology Reporting for Oesophageal and Gastric Malignancy

Definition of Synoptic Reporting

This form may provide more data elements than required for collection by standard setters such as NCI SEER, CDC NPCR, and CoC NCDB.

New Cancer Cases By Site Breast 28% Lung 14% Colo-Rectal 10% Uterus 6% Thyroid 5% Lymphoma 4% Ovary 3%

Uterine Cervix. Protocol applies to all invasive carcinomas of the cervix.

This form may provide more data elements than required for collection by standard setters such as NCI SEER, CDC NPCR, and CoC NCDB.

Carcinoma of the Urinary Bladder Histopathology

UTERINE SARCOMA EXAMPLE OF A UTERINE SARCOMA USING PROPOSED TEMPLATE

Tumours of the Oesophagus & Gastro-Oesophageal Junction Histopathology Reporting Proforma

SEER Advanced Topic 2018 Presentation. EOD 2018 and SS2018 Jennifer Ruhl

2009 USCAP Gyn Pathology Evening Session Case #3. Richard J. Zaino, MD Hershey Medical Center Penn State University Hershey, PA

C ORPUS UTERI C ARCINOMA STAGING FORM (Carcinosarcomas should be staged as carcinomas)

VULVAR CARCINOMA. Page 1 of 5

CODING STAGE: TNM AND OTHER STAGING SYSTEMS. Liesbet Van Eycken Otto Visser

B REAST STAGING FORM. PATHOLOGIC Extent of disease through completion of definitive surgery. CLINICAL Extent of disease before any treatment

6/5/2010. Renal vein invasion & Capsule Penetration (T3a) Adrenal Gland involvement (T4 vs. M1) Beyond Gerota s Fascia? (?T4).

The 8th Edition Lung Cancer Stage Classification

A215- Urinary bladder cancer tissues

B REAST STAGING FORM. PATHOLOGIC Extent of disease through completion of definitive surgery. CLINICAL Extent of disease before any treatment

Urinary Bladder, Ureter, and Renal Pelvis

Testicular Malignancies /8/15

GUIDELINES ON RENAL CELL CANCER

Uterine Malignancies. Collecting Cancer Data: Uterine Malignancies 10/7/2010. NAACCR Webinar Series 1. Questions. Fabulous Prizes!!!

Staging for Residents, Nurses, and Multidisciplinary Health Care Team

Uterus Malignancies /5/15

SEER Summary Stage Still Here!

AJCC Cancer Staging Form Supplement

Cervical Cancer: 2018 FIGO Staging

Interactive Staging Bee

Colorectal Cancer Structured Pathology Reporting Proforma DD MM YYYY

Male genital tract tumors. SiCA. Division of Urology, Department of Surgery, Faculty of Medicine Siriraj Hospital.

Guidelines for Assigning Summary Stage 2000

25 TH ICRO DEHRADUN STAGING OF GENITOURINARY MALIGNANCIES

2018 Grade PEGGY ADAMO, RHIT, CTR OCTOBER 11, 2018

RENAL CELL CARCINOMA 2 to 3% of All New Visceral Cancers Peak Incidence is 6th Decade M:F = 2:1 Grossly is a Bright Yellow, Necrotic Mass with a Pseud

STAGE CATEGORY DEFINITIONS

Carcinoma of the Renal Pelvis and Ureter Histopathology

Major Rule Changes. Donna M. Gress, RHIT, CTR Technical Editor, AJCC Cancer Staging Manual First Author, Chapter 1: Principles of Cancer Staging

Oral cancer: Prognosis & Treatment. Dr. Hani Al Sheikh Radhi

MUSCLE - INVASIVE AND METASTATIC BLADDER CANCER

Summary Stage 2018 (SS2018)

Biology Human Anatomy Abdominal and Pelvic Cavities

Type I. Type II. Excess estrogen Lynch Endometrioid adenocarcinoma PTEN. High grade More aggressive Serous, Clear Cell p53

Table of Contents Comparison Chart

GUIDELINES ON NON-MUSCLE- INVASIVE BLADDER CANCER

Small Intestine. Protocol revision date: January 2005 Based on AJCC/UICC TNM, 6 th edition

AJCC Cancer Staging 8 th edition. Lip and Oral Cavity Oropharynx (p16 -) and Hypopharynx Larynx

Bladder Case 1 SURGICAL PATHOLOGY REPORT. Procedure: Cystoscopy, transurethral resection of bladder tumor (TURBT)

This protocol is intended to assist pathologists in providing

TOPICS FOR DISCUSSION

3/25/2019. Rare uterine cancers ~3% Leiomyosarcoma Carcinosarcoma (MMMT) Endometrial Stromal Sarcomas Aggressive tumors High Mortality Rates

Completing the Puzzle AJCC TNM Staging Breast. Nicole Catlett, CTR 2017 Kentucky Cancer Registry Fall Conference, September 21 & 22, 2017

Vulvar Carcinoma. Definition: Cases should be classified as carsinoma of the vulva when the primary site growth is in the vulva Malignant melanoma sho

Staging. Carcinoma confined to the corpus. Carcinoma confined to the endometrium. Less than ½ myometrial invasion. Greater than ½ myometrial invasion

Endometrium. Protocol applies to all carcinomas of the endometrium. Procedures Cytology (No Accompanying Checklist) Biopsy Curettage Hysterectomy

47. Melanoma of the Skin

NAACCR Webinar Series 1 Q&A. Fabulous Prizes. Collecting Cancer Data: Ovary 11/3/2011. Collecting Cancer Data: Ovary

LOINC. Clinical information. RCPA code. Record if different to report header Operating surgeon name and contact details. Absent.

Proposed All Wales Vulval Cancer Guidelines. Dr Amanda Tristram

NAACCR Webinar Series 1

2018 Implementation: SEER Summary Stage 2018

SUBJECTS 2nd year, 1st semester I. 1. Primitive gut - limits, derivatives 2. Foregut -limits, evolution, derivatives 3. Midgut -limits, evolution,

Head & Neck Clinical Sub Group. Network Agreed Imaging Guidelines for UAT and Thyroid Cancer. Measure Nos: 11-1C-105i & 11-1C-106i

Topics: Staging and treatment for pancreatic cancer. Staging systems for pancreatic cancer: Differences between the Japanese and UICC systems

CPC on Cervical Pathology

Staging Challenges in Lower GI Cancers. Disclosure of Relevant Financial Relationships. AJCC 8 th edition and CAP protocol updates

6. Cervical Lymph Nodes and Unknown Primary Tumors of the Head and Neck

Question: If in a particular case, there is doubt about the correct T, N or M category, what do you do?

A916: rectum: adenocarcinoma

The Depth of Tumor Invasion is Superior to 8 th AJCC/UICC Staging System to Predict Patients Outcome in Radical Cystectomy.

The Human Body: An Overview of Anatomy. Anatomy. Physiology. Anatomy - Study of internal and external body structures

Q&A. Fabulous Prizes. Collecting Cancer Data: Bladder, Renal Pelvis, and Ureter 5/2/13. NAACCR Webinar Series

Update on staging colorectal carcinoma, the 8 th edition AJCC. General overview of staging. When is staging required? 11/1/2017

6 th Reprint Manual Pages AJCC 7 th Edition

The new FIGO classification in endometrial carcinoma

MPH Quiz. 1. How many primaries are present based on this pathology report? 2. What rule is this based on?

Colon and Rectum. Protocol revision date: January 2005 Based on AJCC/UICC TNM, 6th edition

CODING PRIMARY SITE. Nadya Dimitrova

Case Scenario 1 Worksheet. Primary Site C44.4 Morphology 8743/3 Laterality 0 Stage/ Prognostic Factors

H&E, IHC anti- Cytokeratin

3. Guidelines for Reporting Bladder Cancer, Prostate Cancer and Renal Tumours

Thyroid INTRODUCTION ANATOMY SUMMARY OF CHANGES

GUIDELINES ON PENILE CANCER

Pancreas (Exocrine) Protocol applies to all carcinomas of the exocrine pancreas.

Current staging of endometrial carcinoma with MR imaging

CARCINOMA CERVIX. Dr. PREETHI REDDY. B. M S OBG II yr POST GRADUATE.

Transcription:

UICC 8 th Edition Errata 25 th of May 2018 ions are in italics Head and Neck Tumours Page 19 Oral Cavity T2 T3 T4a Tumour 2 cm or less in greatest dimension and more than 5 mm but no more than 10 mm depth of invasion or, Tumour more than 2 cm but not more than 4 cm in greatest dimension and depth of invasion no more than10 mm Tumour more than 4 cm in greatest dimension or more than 10 mm depth of invasion (oral cavity) Tumour invades through the cortical bone of the mandible or maxilla or maxillary sinus, or invades the skin of the face. T1 T2 Tumour 2 cm or less in greatest dimension and 5 mm or less depth of invasion* Tumour 2 cm or less in greatest dimension and more than 5 mm depth of invasion or, Tumour more than 2 cm but not more than 4 cm in greatest dimension and depth of invasion no more than 10 mm T3 Tumour more than 2 cm but not more than 4 cm in greatest dimension and depth of invasion more than 10 mm or Tumour more than 4 cm in greatest dimension and not more than 10 mm depth of invasion T4a (oral cavity) Tumour more than 4 cm in greatest dimension and more than 10 mm depth of invasion or tumour invades through the cortical bone of the mandible or maxilla or involves the maxillary sinus, or invades the skin of the face. Pages 20, p27, p34, p38, p41, and p49 ly pn2a pn2a Metastasis in a single ipsilateral lymph node, less than 3cm in greatest dimension with extranodal extension or more than 3 cm but not more than 6 cm in greatest dimension without extranodal extension Metastasis in a single ipsilateral lymph node, 3cm or less in greatest dimension with extranodal extension or more than 3 cm but not more than 6 cm in greatest dimension without extranodal extension 1

Page 24 Hypopharynx ly T3 Tumour more than 4 cm in greatest dimension, or with fixation of hemilarynx or extension to oesophagus T3 Tumour more than 4 cm in greatest dimension, or with fixation of hemilarynx or extension to oesophageal mucosa Page 28 Oropharynx p16 positive Clinical Stage III T4 Any M0 Stage III T4 AnyN M0 Pathological Stage II T1,T2 N2 M0 T3 N0,N1 M0 Stage II T1,T2 N2 M0 T3,T4 N0,N1 M0 Page 40 and 41 Unknown primary N Regional Lymph Nodes N2c Metastasis in bilateral or contralateral lymph nodes, none more than 6 cm in greatest dimension, without extranodal extension N2c Delete contralateral Metastasis in bilateral or contralateral lymph nodes, none more than 6 cm in greatest dimension, without extranodal extension pn Regional Lymph Nodes pn2c Metastasis in bilateral or contralateral lymph nodes, none more than 6 cm in greatest dimension, without extranodal extension pn2c Delete contralateral Metastasis in bilateral or contralateral lymph nodes, none more than 6 cm in greatest dimension, without extranodal extension 2

Page 59 Oesophagus Squamous cell Pathological Stage Stage IVA T4a N2 M0 T4b AnyN M0 Any T N3 M0 Stage IV AnyT AnyN M1 Stage IVA T4a N2 M0 T4b AnyN M0 Any T N3 M0 Stage IVB AnyT AnyN M1 Page 61 Oesophagus Adenocarcinoma Pathological Prognostic Group Group IB T1a N0 M0 2, T1b N0 M0 1, 2 Group IIIA T1 N2 M0 Any T2 N1 M0 Any T3, N0 M0 Any Group IB T1a N0 M0 2 T1b N0 M0 1, 2, X Group IIIA T1 N2 M0 Any T2 N1 M0 Any T3 N0 M0 Any Delete Page 66 Stomach Reference Gastric Cancer 2016, in press Gastric Cancer 2017; 20: 217-225 3

Page 72 Appendix Stage IVA Any T Any N0 M1a Stage IVA Any T Any N M1a Any T Any N M1b G1 Page 80 Liver T4 Tumor(s) involving a major branch of the portal or hepatic vein with direct invasion of adjacent organs (including the diaphragm), other than the gallbladder or with perforation of visceral peritoneal. T4 Tumor(s) involving a major branch of the portal or hepatic vein or with direct invasion of adjacent organs (including the diaphragm), other than the gallbladder or with perforation of visceral peritoneal. Page 91/92 Ampulla of Vater T3 Tumor invades pancreas T3 Tumour invades pancreas or peripancreatic tissue N Regional Lymph Nodes NX N0 N1 N2 Regional lymph nodes cannot be assessed No regional lymph node metastasis Metastasis in 1 or 2 regional lymph nodes Metastasis in 3 or more regional lymph nodes N Regional Lymph Nodes NX N0 N1 N2 Regional lymph nodes cannot be assessed No regional lymph node metastasis Metastasis in 1 to 3 regional lymph nodes Metastasis in 4 or more regional lymph nodes 4

Page 94 Pancreas T1 T1 Tumour 2 cm or less in greatest dimension T1a Tumour 0.5 cm or less in greatest dimension T1b Tumour greater than 0.5 cm and less than 1 cm in greatest dimension T1c Tumor greater than 1 cm but no more than 2 cm in greatest dimension Tumour 2 cm or less in greatest dimension T1a Tumour 0.5 cm or less in greatest dimension T1b Tumour greater than 0.5 cm and no more than 1 cm in greatest dimension T1c Tumor greater than 1 cm but no more than 2 cm in greatest dimension Page 102 Pancreas T4 Tumour perforates visceral peritoneum (serosa) or invades other organs or adjacent structures T4 Tumour invades adjacent organs (stomach, spleen, colon, adrenal gland) or the wall of large vessels (coeliac axis or the superior mesenteric artery) Page 113 Pleural Mesothelioma T1 Tumour involves ipsilateral parietal or visceral pleura only, with or without involvement of visceral, mediastinal or diaphragmatic pleura. T1 Tumour involves ipsilateral parietal or visceral pleura only, with or without involvement of visceral, mediastinal or diaphragmatic pleura. Page 124 Soft Tissue Sarcoma Histological Types of Tumour The following histological types are not included: Kaposi sarcoma Dermatofibrosarcoma (protuberans) Fibromatosis (desmoid tumour) Sarcoma arising from the dura mater, brain, hollow viscera, or parenchymatous organs (with the exception of breast sarcomas). Angiosarcoma, an aggressive sarcoma, is excluded because its natural history is not consistent with the classification. 5

Histological Types of Tumour The following histological types are not included: Kaposi sarcoma Dermatofibrosarcoma (protuberans) Fibromatosis (desmoid tumour) Sarcoma arising from the dura mater or brain, Angiosarcoma, an aggressive sarcoma, is excluded because its natural history is not consistent with the classification. Note Cystosarcoma phylloides is staged as a soft tissue sarcoma of the superficial trunk Page 140 Carcinoma of the skin of the eyelid T3 Tumor > 20 mm, but more than 30 mm in greatest dimension T3 Tumor > 20 mm in greatest dimension but more than 30 mm Page 143 Melanoma ptx pt0 ptis Note: Primary tumour cannot be assessed* No evidence of primary tumour Melanoma in situ (Clark level I) (atypical melanocytic hyperplasia, severe melanocytic dysplasia, not an invasive malignant lesion) *ptx includes shave biopsies and regressed melanomas. ptx Primary tumour cannot be assessed* pt0 No evidence of primary tumour or regressed melanomas ptis Melanoma in situ (Clark level I) Note: *ptx includes shave biopsies and curettage that do not fully assess the thickness of the primary.. pt1 Tumour 1 mm or less in thickness pt1a 0.8mm or less in thickness without ulceration pt1b 0.8mm or less in thickness with ulceration or more than 0.8mm but no more than 1mm in thickness, with or without ulceration pt1 Tumour 1 mm or less in thickness 6

pt1a pt1b less than 0.8mm in thickness without ulceration less than 0.8mm in thickness with ulceration or 0.8mm or more but no more than 1mm in thickness, with or without ulceration And Stage IIIB pt0 N1b, N1c M0 Stage IIIC pt0 N2b, N2c, N3b, N3c M0 Page 149 Merkel Cell Carcinoma of the skin Pathological Stage Stage IIIB Any T N1b,N2,N3 M0 Pathological Stage Stage IIIB T1,T2, T3, T4 N1b,N2,N3 M0 Page 156 Breast : pn3a Metastasis in 10 or more ipsilateral axillary lymph nodes (at least one larger than 2 mm) or metastasis in infraclavicular lymph nodes Clarrification: pn3a Metastasis in 10 or more ipsilateral axillary lymph nodes (at least one larger than 2 mm) or metastasis in infraclavicular lymph nodes/level III lymph nodes. Page 166 Cervix Uteri Regional Lymph Nodes The regional lymph nodes are the paracervical, parametrial, hypogastric (internal iliac, obturator), common and external iliac, presacral, and lateral sacral nodes. Para-aortic nodes are not regional. Regional Lymph Nodes The regional lymph nodes are the paracervical, parametrial, hypogastric (internal iliac, obturator), common and external iliac, presacral, lateral sacral nodes and para-aortic nodes. Note In the 7 th edition the paraortic nodes were considered to be metastatic but to be consistent with advice from FIGO the paraortic nodes are now classified as regional 7

Page 173/4 Uterus Endometrium Stage III T1, T2, T3 N1, N2 M0 Stage IIIC1 T1, T2, T3 N1 M0 Stage IIIC2 T1, T2, T3 N2 M0 Stage IIIC T1, T2, T3 N1, N2 M0 Stage IIIC1 T1, T2, T3 N1 M0 Stage IIIC2 T1, T2, T3 N2 M0 Page 175 Uterine Sarcomas (leiomyosarcoma, endometrial stromal sarcoma, adenosarcoma) (ICD-O-3 53, 54) Clarrification (leiomyosarcoma, endometrial stromal sarcoma, adenosarcoma) (ICD-O-3 53, 54, 54.1, 54.2) P 179 Ovary Regional Lymph Nodes The regional lymph nodes are the hypogastric (obturator), common iliac, external iliac, lateral sacral, paraaortic, retroperitoneal, and inguinal nodes. Regional Lymph Nodes The regional lymph nodes are the hypogastric (obturator), common iliac, external iliac, lateral sacral, paraaortic, and retroperitoneal nodes* * Note *including intra-abdominal node such as greater omental nodes. Page 182 Ovary M Distant Metastasis M0 M1 No distant metastasis Distant metastasis M Distant Metastasis M0 M1 M1a M1b No distant metastasis Distant metastasis Pleural effusion with positive cytology Parenchymal metastasis and metastasis to extra-abdominal organs (including inguinal lymph nodes and lymph nodes outside the abdominal cavity) 8

Stage Stage I T1 N0 M0 Stage IA T1a N0 M0 Stage IB T1b N0 M0 Stage IC T1c N0 M0 Stage II T2 N0 M0 Stage IIA T2a N0 M0 Stage IIB T2b N0 M0 Stage IIC T2c N0 M0 Stage Stage I T1 N0 M0 Stage IA T1a N0 M0 Stage IB T1b N0 M0 Stage IC T1c N0 M0 Stage II T2 N0 M0 Stage IIA T2a N0 M0 Stage IIB T2b N0 M0 Stage IIC T2c N0 M0 Page 186 : GTT Pretreatment <10 3 10 3 < 10 4 10 4 < 10 5 >10 5 serum hcg (IU/ml) Pretreatment <10 3 10 3 < 10 4 10 4 < 10 5 10 5 serum hcg(iu/ml) Page 188 Penis T Primary Tumour Tis Carcinoma in situ Ta Noninvasive verrucous carcinoma 1 T1 Tumour invades subepithelial connective tissue T1a Tumour invades subepithelial connective tissue without lymphovascular invasion and is not poorly differentiated T1b Tumour invades subepithelial connective tissue with lymphovascular invasion or is poorly differentiated Note: 1 Verrucous carcinoma not associated with destructive invasion. 9

Tis Carcinoma in situ (Penile intraepithelial neoplasia PeIN) Ta Noninvasive localized squamous cell carcinoma 1 T1 Tumour invades subepithelial connective tissue 2 T1a Tumour invades subepithelial connective tissue without lymphovascular invasion or perineural invasion and is not poorly differentiated T1b Tumour invades subepithelial connective tissue with lymphovascular invasion or perineural invasion or is poorly differentiated Note: 1 Including verrucous carcinoma. 2 Glans: Tumor invades lamina propria Foreskin: Tumor invades dermis, lamina propria or dartos fascia Shaft: Tumor invades connective tissue between epidermis and corpora and regardless of location Page 191, 193 Prostate T3 Tumour extends through the prostatic capsule 2 T3a Extracapsular extension (unilateral or bilateral) including microscopic bladder neck involvement T3 Tumour extends through the prostatic capsule 2 T3a Extraprostatic extension (unilateral or bilateral) including microscopic bladder neck involvement ptnm Pathological Classification The pt and pn categories correspond to the T and N categories. For pm see page 8 However, there is no pt1 category because there is insufficient tissue to assess the highest pt category or sub-categories of pt2 ptnm Pathological Classification The pt and pn categories correspond to the T and N categories. For pm see page 8 However, there is no pt1 category because there is insufficient tissue to assess the highest pt category. There are no sub-categories of pt2 Prognostic Factor Grid 10

Gleason Sum Score Page 195 Testes Stage IIA Any pt/tx N1 M0 S0 Any pt/tx N1 M0 S1 Stage IIB Any pt/tx N2 M0 S0 Any pt/tx N2 M0 S1 Stage II Any pt/tx N3 M0 S0 Any pt/tx N3 M0 S1 Stage IIA Any pt/tx N1 M0 S0 Any pt/tx N1 M0 S1 Stage IIB Any pt/tx N2 M0 S0 Any pt/tx N2 M0 S1 Stage IIC Any pt/tx N3 M0 S0 Any pt/tx N3 M0 S1 Page 199 Kidney T Primary Tumour T3 Tumour extends into major veins or perinephric tissues but not into the ipsilateral adrenal gland and not beyond Gerota fascia T3a Tumour extends into the renal vein or its segmental (muscle containing) branches, or tumour invades perirenal and/or renal sinus fat (peripelvic) fat but not beyond Gerota fascia T3b Tumour grossly extends into vena cava below diaphragm T3c Tumour grossly extends into vena cava above the diaphragm or invades the wall of the vena cava T3 Tumour extends into major veins or perinephric tissues but not into the ipsilateral adrenal gland and not beyond Gerota fascia T3a Tumour extends into the renal vein or its segmental (muscle containing) branches, or tumour invades the pelvicalyceal system or tumour invades perirenal and/or renal sinus fat (peripelvic) fat but not beyond Gerota fascia T3b Tumour grossly extends into vena cava below diaphragm T3c Tumour grossly extends into vena cava above the diaphragm or invades the wall of the vena cava Page 204, 205 Urinary Bladder T2 Tumour invades muscle T2a Tumour invades superficial muscle (inner half) 11

T2b Tumour invades deep muscle (outer half) T2 Stage IVA T4b N0 M0 Tumour invades muscularis propria T2a Tumour invades superficial muscularis propria (inner half) T2b Tumour invades deep muscularis propria (outer half) Stage IVA T4b Any N M0 Page 208 Urethra Urothelial (Transitional cell) carcinoma of the prostate Tis pu Tis pd Carcinoma in situ, involvement of prostatic urethra Carcinoma in situ, involvement of prostatic ducts Urothelial (Transitional cell) carcinoma of the prostate Tis pu Carcinoma in situ, involving the prostatic urethra, periurethral or prostatic ducts without stromal invasion Page 224 Malignant Melanoma of the Uvea Stage* Note *The stage groups are for malignant melanoma of the choroid and ciliary body but not of the iris Page 232 Lacrimal Gland T2 Tumour more than 2 cm but not more than 4 cm in greatest dimension, limited to the lacrimal gland T2a No periosteal or bone involvement T2b Periosteal involvement without bone involvement T2c Bone involvement T2 Tumour more than 2 cm but not more than 4 cm in greatest dimension, limited to the lacrimal gland T2a No periosteal or bone involvement T2b Periosteal involvement without bone involvement T2c Bone involvement 12