Clinical T

This input is used for staging

Notes

**Note 1:** Pleural effusion does not affect the coding Clinical and Pathologic T, but is coded in **Site-Specific Factor 1**. **Note 2:** T3 describes locally advanced, but potentially resectable tumor. **Note 3:** T4 describes locally advanced, technically unresectable tumor.

NAACCR Item

NAACCR #940
Clinical T Clinical T Display Description Registrar Notes
cX cTX Primary tumor cannot be assessed Clinical classification criteria met, evaluation done:
Physician unable to assess T
Extension cannot be determined
Physician assigns cTX, no other information available to determine T
c0 cT0 No evidence of primary tumor
c1 cT1 Tumor involves ipsilateral parietal pleura
WITH or WITHOUT focal involvement of visceral pleura
Note: T1 has subcategories of T1a and T1b. Assign T1 only when there is no information available to assign one of the subcategories

Invasive tumor (mesothelioma) confined to pleura, NOS
Ipsilateral parietal pleura, including mediastinal or diaphragmatic pleura, involvement of visceral pleura not stated

Localized, NOS

Stated as T1 [NOS]
c1A cT1a Tumor involves ipsilateral parietal (mediastinal, diaphragmatic) pleura
NO involvement of visceral pleura
Stated as T1a
c1B cT1b Tumor involves ipsilateral parietal (mediastinal, diaphragmatic) pleura
WITH focal involvement of the visceral pleura
Stated as T1b
c2 cT2 Tumor involves any of the ipsilateral pleural surfaces, with at least one of the following:
Confluent visceral pleura tumor (including the fissure)
Invasion of diaphragmatic muscle
Invasion of lung parenchyma
Ipsilateral pleura WITH nodule(s) beneath visceral pleural surface
Lung involvement, NOS
Mesothelioma nodule(s) which have broken through the visceral pleural surface to the lung surface

Stated as T2
c3 cT3 Tumor involves any ipsilateral pleural surfaces, with at least one of the following:
Invasion of endothoracic fascia
Invasion into mediastinal fat
Solitary focus of tumor invading soft tissues of the chest wall
Non-transmural involvement of the pericardium
Mediastinal tissues

Stated as T3
c4 cT4 Tumor involves any ipsilateral pleural surfaces, with at least one of the following:
Diffuse or multifocal invasion of soft tissues of chest wall
Any involvement of rib
Invasion through diaphragm to peritoneum
Invasion of any mediastinal organ(s)
Direct extension to contralateral pleura
Invasion into the spine
Extension to internal surface of pericardium
Pericardial effusion with positive cytology
Invasion of myocardium
Invasion of brachial plexus
Heart muscle, myocardium

Further contiguous extension:
Cervical tissues
Intra-abdominal organs

(For contralateral lung, see distant metastasis)

Stated as T4
88 88 Not applicable Primary site/histology not TNM defined
Death certificate only (DCO) case
<BLANK> BLANK See Registrar Notes Clinical classification criteria not met
Clinical classification criteria met, evaluation done:
No information about diagnostic workup
Results not documented in record
Clinical evaluation of primary tumor not done or unknown if done
Tumor first detected on surgical resection (no clinical workup)
Evidence of metastatic disease [(cM1) or (pM1)], no other workup
Only Clinical Stage Group documented (no T, N, or M information available)