Clinical T

This input is used for staging


**Note 1:** Assign 88 for in situ cases (behavior code /2). TNM does not include an in situ category for lacrimal gland tumors. **Note 2:** Tumors greater than 2 cm (the size of the lacrimal gland) usually extend into the orbital soft tissue. **Note 3:** Periosteum is a fibrous membrane that wraps the outer surface of bones. **Note 4:** 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 5:** Assign the appropriate T category (T1, T2) based on the tumor size for the following descriptions Extension to any of the following WITHOUT bone invasion Globe (eyeball) Optic nerve Orbital soft tissues Confined to lacrimal gland Localized, NOS


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 2 cm or less in greatest dimension
LIMITED to the lacrimal gland
Stated as T1
c2 cT2 Tumor more than 2 cm but not more than 4 cm in greatest dimension
LIMITED to the lacrimal gland
Stated as T2
c3 cT3 Tumor more than 4 cm OR
WITH extraglandular extension into orbital soft tissue, including optic nerve or globe
Stated as T3
c4 cT4 Tumor invades periosteum or orbital bone or adjacent structures Note: T4 has subcategories of T4a, T4b and T4c. Assign T4 only when there is no information available to assign one of the subcategories

Stated as T4 [NOS]
c4A cT4a Tumor invades periosteum Stated as T4a
c4B cT4b Tumor invades orbital bone Stated as T4b
c4C cT4c Tumor invades adjacent structures:
Pterygoid fossa
Temporal fossa
Stated as T4c
88 88 Not applicable Primary site/histology not TNM defined
In situ case but no pTis is defined by TNM
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)