Skin Cancer Melanoma Stage

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Melanoma Stage o:

• Known as “cancer in situ,” meaning the lesion contains cancer cells in only the outer layer of skin
• Also called noninvasive cancer

Melanoma Stage 1A/IA :

• Size is less than 1.0 mm or smaller
• Has no ulceration
• Is Clark’s level II or III*

Melanoma Stage 1B/IB:

• Size is less than 1.0 mm or smaller and has ulceration or Clark’s level IV or V invasion*
• Or, the size is between 1.0 mm and 2.0 mm and has ulceration

Melanoma Stage 2A/IIA:

• Size is between 1.0 mm and 2.0 mm and has ulceration
• Or, the size is between 2.0 mm and 4.0 mm and has no ulceration

Melanoma Stage 2B/IIB:

• Size is between 2.0 mm and 4.0 mm and has ulceration
• Or, the size is larger than 4.0 mm and has no ulceration

Melanoma Stage 2C/IIC:

• Size is larger than 4.0 mm and has ulceration

Melanoma Stage 3/III:

• Any tumor size
• The cancer has spread to nearby lymph nodes and/or there is in-transit or satellite involvement
• Has not spread to other parts of the body

Melanoma Stage 4/IV/Final:

• Any tumor size
• The cancer has spread to other parts of the body beyond the regional lymph nodes

*Clark's Level:

1. Melanoma confined to the epidermis (melanoma in situ)
2. Invasion into the papillary dermis
3. Invasion to the junction of the papillary and reticular dermis
4. Invasion into the reticular dermis
5. Invasion into the subcutaneous fat

Main Article: Melanoma Symptoms and Signs