Viva Practice for the FRCS(Urol) and Postgraduate Urology Examinations, 2nd ed.

Chapter 15 Tnm Classification For Urological Cancers

Herman S Fernando

Tables 15.1 through to 15.7 describe the latest TNM staging system for individual urological cancers.

Table 15.1 TNM (8th edition) staging of bladder cancer

Tx

Primary tumour cannot be assessed

Ta

Non-invasive papillary carcinoma

Tis

Carcinoma in situ:‘flat tumour’

T1

Tumour invades subepithelial connective tissue

T2

T2a: Tumour invades superficial muscularis propria (inner half)

T2b: Tumour invades deep muscularis propria (outer half)

T3

T3a: Tumour invades perivesical tissue microscopically

T3b: Tumour invades perivesical tissue macroscopically (extravesical mass)

T4

T4a: Tumour invades prostate stroma, seminal vesicles, uterus or vagina

T4b: Tumour invades pelvic wall or abdominal wall

Nx

Regional lymph nodes cannot be assessed

N0

No regional lymph node metastasis

N1

Metastasis in a single lymph node in true pelvis (hypogastric, obturator; external iliac or presacral)

N2

Metastasis in multiple lymph nodes in true pelvis (hypogastric, obturator; external iliac or presacral)

N3

Metastasis in common iliac lymph node(s)

Mx

Distant metastasis cannot be assessed

M0

No distant metastasis

M1

MIa: Non-regional lymph nodes

MIb: Other distant metastases

Table 15.2 TNM (8th edition) classification for upper tract urothelial carcinoma

Tx

Primary tumour cannot be assessed

TO

No evidence of primary tumour

Ta

Non-invasive papillary carcinoma

Tis

Carcinoma in situ

TI

Invades subepithelial connective tissue

T2

Tumour invades muscularis propria

T3

Renal pelvis - Tumour invades beyond muscularis into peripelvic fat or renal parenchyma Ureter - Tumour invades beyond muscularis into periureteric fat

T4

Tumour invades into adjacent organs or through kidney into perinephric fat

Nx

Regional lymph nodes cannot be assessed

NO

No regional lymph node metastasis

N1

Metastasis in a single lymph node 2 cm or less in the greatest dimension

N2

Metastasis in a single lymph node more than 2 cm, or multiple lymph nodes

Mx

Distant metastasis not assessed

MO

No distant metastasis

MI

Distant metastasis

Table 15.3. TNM (8th edition) classification for penile cancer (note that the pathological classification is given here as candidates often have difficulty with this)

TX

Primary tumour cannot be assessed

TO

No evidence of primary tumour

Tis

Carcinoma in situ (penile intraepithelial neoplasia [PeIN])

Ta

Non-invasive localised squamous cell carcinoma/non-invasive verrucous carcinoma (not associated with destructive invasion)

TI

Tumour invades subepithelial connective tissue (lamina propria)

TIa: Tumour invades subepithelial connective tissue without perineural or lymphovascular invasion and is not poorly differentiated or undifferentiated (TIGI-2)

TIb: Tumour invades subepithelial connective tissue with perineural or lymphovascular invasion or is poorly differentiated or undifferentiated (TIG3-4)

T2

Tumour invades corpus spongiosum with or without invasion of the urethra

T3

Tumour invades corpus cavernosum (including tunica albuginea) with or without invasion of the urethra

T4

Tumour invades other adjacent structures (scrotum, prostate, bone)

NX

Regional lymph nodes cannot be assessed

NO

No lymph node metastasis

pNI

Metastasis in one or two unilateral inguinal lymph nodes, but without extra-nodal extension

pN2

Metastasis in three or more unilateral inguinal lymph nodes without extra-nodal extension, or, any number of bilateral positive inguinal lymph nodes without extra-nodal extension

pN3

Metastasis to any number of inguinal lymph nodes with extra-nodal extension, or, metastasis to pelvic lymph nodes

MO

No distant metastases

MI

Distant metastases

Table 15.4 TNM (8th edition) classification for renal cancer

Tx

Primary tumour cannot be assessed

TO

No evidence of primary tumour

TI

Tumour <7 cm in greatest dimension, limited to the kidney

TI a: Tumour <4 cm in greatest dimension, limited to the kidney

TI b: Tumour >4 cm but <7 cm in greatest dimension

T2

Tumour >7 cm in greatest dimension, limited to the kidney

T2a: Tumour >7 cm but < IO cm in greatest dimension

T2b:Tumour > IO cm limited to the kidney

T3

Tumour extends into major veins or perinephric tissues but not into the ipsilateral adrenal gland and not beyond Gerota’s fascia

T3a: Tumour extends into the renal vein or its segmental branches, or tumour invades the pelvi-calyceal system or tumour invades perirenal and/or renal sinus fat (peripelvic fat) but not beyond Gerota’s fascia

T3b: Tumour extends into the vena cava (VC) below the diaphragm

T3c: Tumour extends into vena cava above the diaphragm or invades the wall of the vena cava

T4

Tumour invades beyond Gerota’s fascia (including contiguous extension into the ipsilateral adrenal gland)

Nx

Regional LNs cannot be assessed

NO

No regional LN metastasis

NI

Metastasis in regional LN

MO

No distant metastasis

MI

Distant metastasis

Table 15.5. TNM (8th edition) classification for prostate cancer

TX

Primary tumour cannot be assessed

TO

No evidence of primary tumour

TI

Clinically inapparent tumour not palpable or visible by imaging

TIa: Tumour incidental histological finding in 5% or less of tissue resected

TIb: Tumour incidental histological finding in more than 5% of tissue resected

TIc: Tumour identified by needle biopsy (e.g. because of elevated prostate-specific antigen level)

T2

Tumour that is palpable and confined within the prostate

T2a: Tumour involves one-half of one lobe or less

T2b: Tumour involves more than half of one lobe, but not both lobes

T2c: Tumour involves both lobes

T3

Tumour extends through the prostatic capsule

T3a: Extraprostatic extension (unilateral or bilateral) including microscopic bladder neck involvement

T3b: Tumour invades seminal vesicle(s)

T4

Tumour is fixed or invades adjacent structures other than seminal vesicles: external sphincter, rectum, levator muscles, and/or pelvic wall

Nx

Regional lymph nodes cannot be assessed

NO

No regional lymph node metastasis

NI

Regional lymph node metastasis

Mx

Distant metastasis cannot be assessed

MO

No distant metastasis

(Continued)

Table 15.5 (Continued TNM (8th edition) classification for prostate cancer

MI

Distant metastasis

MIa: Non-regional lymph node(s)

MIb: Bone(s)

MIc: Other site(s)

Table 15.6 TNM (8th edition) classification for testicular cancer

pTX

Primary tumour cannot be assessed

pTO

No evidence of primary tumour (e.g. histological scar in testis)

pTis

Intratubular germ cell neoplasia (testicular intraepithelial neoplasia)

pTI

Tumour limited to testis and epididymis without vascular/lymphatic invasion; tumour may invade tunica albuginea but not tunica vaginalis

pT2

Tumour limited to testis and epididymis with vascular/lymphatic invasion, or tumour extending through tunica albuginea with involvement of tunica vaginalis

pT3

Tumour invades spermatic cord with or without vascular/lymphatic invasion

pT4

Tumour invades scrotum with or without vascular/lymphatic invasion

NX

Regional lymph nodes cannot be assessed

NO

No regional lymph node metastasis

NI

Metastasis with a lymph node mass 2 cm or less in greatest dimension or multiple lymph nodes, none more than 2 cm in greatest dimension

N2

Metastasis with a lymph node mass more than 2 cm but not more than 5 cm in greatest dimension, or multiple lymph nodes, any one mass more than 2 cm but not more than 5 cm in greatest dimension

N3

Metastasis with a lymph node mass more than 5 cm in greatest dimension

MX

Distant metastasis cannot be assessed

MO

No distant metastasis

MI

Distant metastasis

MIa: Non-regional lymph node(s) or lung

MIb: Other sites

SX

Serum marker studies not available or not performed

SO

Serum marker study levels within normal limits

LDH (U/L)

hCG (mlU/mL)

AFP (ng/mL)

SI

< I.5 x N and

<5,OOO and

< I ,OOO

S2

I.5-IO x N or

5,OOO-5O,OOO or

I,OOO-IO,OOO

S3

>IO x N or

>5O,OOO or

> IO,OOO

Table 15.7 TNM (8th edition) classification for primary urethral cancer (male and female) (note that the staging system for primary prostatic urethral cancer is not included)

Tx

Primary tumour cannot be assessed

Tis

Carcinoma in situ

TO

No evidence of primary tumour

Ta

Non-invasive papillary, polypoid or verrucous carcinoma

TI

Tumour invades subepithelial connective tissue

T2

Tumour invades any of the following structures: corpus spongiosum, prostate, peri-urethral muscle

T3

Tumour invades any of the following structures: corpus cavernosum, invasion beyond prostatic capsule, anterior vaginal wall, bladder neck

T4

Tumour invades other adjacent organs (bladder proper, rectum)

Nx

Regional lymph nodes cannot be assessed

NO

No regional lymph-node metastasis

NI

Metastasis in a single lymph node

N2

Metastasis in multiple nodes

Mx

Distant metastasis cannot be assessed

MO

No distant metastasis

MI

Distant metastasis

Further Reading

1. Brierley JD et al. The TNM Classification of Malignant Tumours, 8th edn. 2017. http://www. uicc.org/resources/tnm/publications-resources



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