Clinical T

This input is used for staging

Notes

**Note 1:** Superficial lesions are located entirely in the subcutaneous tissues without any degree of extension through the muscular fascia or into underlying muscle. **Note 2:** Deep lesions are located partly or completely within one or more muscle groups within the extremity. Deep tumors may extend through the muscular fascia into the subcutaneous tissues or even to the skin but the critical criterion is location of any portion of the tumor within the muscular components of the extremity. * Deep lesions include retroperitoneal and intrathoracic lesions, and the majority of head and neck tumors **Note 3:** For tumors of the extremities and trunk ONLY. * Superficial lesions are defined as those not involving the superficial muscular fascia * Deep lesions are those that involve or are beneath the superficial fascia **Note 4:** Adjacent connective tissue is defined as the unnamed tissues that immediately surround an organ or structure containing a primary cancer. * Assign T1b or T2b (deep tumor) when a tumor has invaded past the outer border (capsule, serosa, or other edge) of the primary organ into the organ's surrounding supportive structures but has not invaded into larger structures or adjacent organs * Blood, cartilage, and bone are coded as connective tissues, but they are coded separately **Note 5:** If a vessel has a name, for example brachial artery or recurrent laryngeal nerve, code it as a structure. **Note 6:** Tumor size must be known to assign a value of T1 or T2. You may use a physician’s statement of the T category if this is the only information in the medical record. * If the tumor appears to be in the T1 or T2 categories, but no size or category is specified, assign TX **Note 7:** Assign the appropriate T category (T1, T2) based on the tumor size for the following descriptions **Superficial tumors (T1a or T2a)** Invasive tumor confined to site/tissue of origin (Lesion does not involve superficial fascia) Tumor involves adjacent connective tissue **Deep tumors (T1b or T2b)** Confined to site/tissue of origin Tumor involves adjacent connective tissue Deep tumor involving adjacent organs/structures including bone/cartilage (including major vessel invasion) Further contiguous extension

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
Tumor size (TS) unknown for T categories where TS needed to determine T
Physician assigns cTX, no other information available to determine T
c0 cT0 No evidence of primary tumor
c1 cT1 Tumor 5 cm or less in greatest dimension Note: T1 has subcategories of T1a and T1b. Assign T1 only when there is no information available to assign one of the subcategories

Localized, NOS

Stated T1 [NOS]
c1A cT1a Tumor 5 cm or less in greatest dimension:
Superficial tumor
Superficial: Localized, NOS

Stated as T1a
c1B cT1b Tumor 5 cm or less in greatest dimension:
Deep tumor
Deep: Localized, NOS

Stated as T1b
c2 cT2 Tumor more than 5 cm in greatest dimension Note: T2 has subcategories of T2a and T2b. Assign T2 only when there is no information available to assign one of the subcategories

Stated as T2 [NOS]
c2A cT2a Tumor more than 5 cm in greatest dimension:
Superficial tumor
Stated as T2a
c2B cT2b Tumor more than 5 cm in greatest dimension:
Deep tumor
Stated as T2b
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)