PT1a melanoma: what to know

The p in PT1a indicates that the stage comes from examination of tissue removed from the skin. T refers to the primary tumour. The a category records a thinner tumour without ulceration, a feature assessed by the pathologist. PT1a describes the primary skin tumour; it is not a promise about every future outcome and it does not replace the full pathology report. The report may also mention margins, mitotic activity and other findings that help the specialist plan care.

Ask for a copy of the pathology report and confirm whether the melanoma has been fully removed. The usual discussion centres on the original biopsy, whether a wider surgical excision is needed, and the most suitable follow-up schedule. A sentinel lymph node biopsy is not automatically required for every thin melanoma; your team weighs pathology features and personal circumstances. Do not begin or stop medicines without the treating team. Check your skin regularly, use shade and protective clothing, and report a changing mole or a new persistent lesion.

Contact your treatment team promptly if the biopsy or surgical wound becomes increasingly red, hot, swollen, painful or starts draining, or if you develop fever. Arrange review for a new or changing pigmented spot, a firm lump near the scar, or a swollen area in the nearby lymph-node region. New neurological symptoms such as persistent severe headache, weakness, confusion or seizures require urgent medical assessment.

Ask what the pathology terms mean, whether margins are clear, whether further excision is advised, and how often your skin and lymph nodes should be checked. Ask which symptoms should lead to an urgent call.