Introductory Notes
The classifications apply to carcinomas of the skin, [excluding vulva (see Gynaecological Tumours), and penis (see Urological Tumours), and perianal skin (see Gastrointestinal Tumours)], to malignant melanomas of the skin including eyelid and to Merkel cell carcinoma.
Anatomical Sites
The following sites are identified by ICD‐O‐3 topography rubrics:
- Lip (excluding vermilion surface) (C44.0)
- Eyelid (C44.1)
- External ear (C44.2)
- Other and unspecified parts of face (C44.3)
- Scalp and neck (C44.4)
- Trunk excluding anal margin and perianal skin (C44.5)
- Upper limb and shoulder (C44.6)
- Lower limb and hip (C44.7)
- Scrotum (C63.2)
Regional Lymph Nodes (Figs. 322, 323)
The regional lymph nodes are those appropriate to the site of the primary tumour.
Unilateral Tumours
- Head, neck: Ipsilateral preauricular, submandibular, cervical, and supraclavicular lymph nodes
- Thorax: Ipsilateral axillary lymph nodes
- Upper limb: Ipsilateral epitrochlear and axillary lymph nodes
- Abdomen, loins, and buttocks: Ipsilateral inguinal lymph nodes
- Lower limb: Ipsilateral popliteal and inguinal lymph nodes
- Anal margin and perianal skin: Ipsilateral inguinal lymph nodes
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