Pathologic Stage IA Cutaneous Melanoma AJCC v8

**Semantic type:** Neoplastic Process

**Definition:** Stage IA includes: (T1a, N0, M0); (T1b, N0, M0). T1a: Tumor measuring less than 0.8 mm in thickness. Ulceration status: Without ulceration. T1b: Tumor measuring less than 0.8 mm in thickness with ulceration, or 0.8-1.0 mm with or without ulceration. N0: No regional lymph node metastasis detected. Presence of in-transit, satellite, and/or microsatellite metastases: No. M0: No evidence of distant metastasis. LDH level is not applicable. (AJCC 8th ed.)

**Synonyms:** - Pathologic Stage IA Melanoma of the Skin AJCC v8 - Stage IA - Stage IA Cutaneous (Skin) Melanoma