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 orbit sarcoma tumors. **Note 2:** The orbital tissues are the support systems of the globe, confined to the space within the surrounding bony structure. The orbital tissues include * Fat, striated and smooth muscle, and fibroconnective, vascular, lymphoid, peripheral nerve, and optic nerve tissue **Note 3:** Tis may be used only for *non-sarcoma* histologies coded to this site. * Sarcomas do not present as in situ or noninvasive tumors


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 15 mm or less in greatest dimension Confined to orbit
Localized, NOS

Stated as T1
c2 cT2 Tumor more than 15 mm in greatest dimension
WITHOUT invasion of globe or bony wall
Stated as T2
c3 cT3 Tumor of any size
WITH invasion of orbital tissues and/or bony walls
Stated as T3
c4 cT4 Tumor invades:
Globe or periorbital structure, such as
Temporal fossa
Nasal cavity
Paranasal sinuses
Central nervous system (CNS)

Further contiguous extension

Stated as T4
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)