| 0 |
In situ, intraepithelial, noninvasive
- Bowen disease |
| 1 |
Localized only (localized, NOS)
- Eyelid margin
- Full thickness of eyelid
- Lesion(s) confined to dermis
- Minimal infiltration of dermis
- Subcutaneous tissue (through entire dermis)
- Underlying orbicularis muscle
- Tarsal plate
- Tarsus |
| 2 |
Regional by direct extension only
- Adjacent structures, NOS
- Bone/periosteum of orbit
- Bony walls of orbit (invades or evades through)
- Bulbar conjunctiva
- Intraorbital structures, NOS
- Lacrimal sac
- Ocular structures
- Sclera
- Skeletal muscles (except orbicularis muscle of eyelid)
- Soft tissues of orbit
- Underlying cartilage |
| 3 |
Regional lymph node(s) involved only
- Buccinator (buccal)
- Cervical, NOS
- Facial, NOS
- Intraparotid
- Nasolabial
- Parotid
+ Infra-auricular
+ Preauricular
- Submandibular [submaxillary]
- Submental
- Supraclavicular, NOS
- Regional lymph node(s), NOS
+ Lymph node(s), NOS |
| 4 |
Regional by BOTH direct extension AND regional lymph node(s) involved
- Codes (2) + (3) |
| 7 |
Distant site(s)/lymph node(s) involved
- Distant site(s) (including further contiguous extension)
+ Brain
+ Central nervous system (CNS)
+ Nasal cavity
+ Nasolacrimal duct
+ Other craniofacial structures
+ Paranasal sinus
- Distant lymph node(s), NOS
- Distant metastasis, NOS
+ Carcinomatosis
+ Distant metastasis WITH or WITHOUT distant lymph node(s), NOS
+ Metastatic skin lesions with or without distant lymph node(s) |
| 9 |
Unknown if extension or metastasis |
