D03.4

Clinical Causes: Prolonged exposure to ultraviolet (UV) radiation from the sun or tanning beds. Having fair skin that burns easily, freckles, or has specific skin types more sensitive to sun damage. A history of sunburns or excessive sun exposure over the years. Presence of numerous or atypical moles, which may increase the risk of melanoma. Weakened immune system which can affect the skin's ability to repair damage. Family history of melanoma or other skin cancers.

Key Symptoms: New or changing pigmented lesion on the scalp or neck. A spot or mole that has irregular borders or uneven color. Lesions that are asymmetrical or have multiple shades of brown, black, or other colors. Lesions that are larger than 6 mm in diameter or increasing in size. Sometimes, the lesion may be flat or slightly raised and may have a rough surface. Itching, bleeding, or crusting of the lesion, though these are less common in early stages.

Diagnosis Path: Diagnosis typically involves a thorough skin examination by a healthcare professional. If a suspicious lesion is identified, a biopsy is performed, where a small sample of tissue from the lesion is removed and examined under a microscope. This helps confirm whether the lesion is melanoma in situ and rules out other skin conditions. Imaging tests may be used if there's suspicion that the melanoma has spread, but these are more common in advanced stages.

Treatment Protocols: The primary treatment for melanoma in situ is surgical excision, where the affected skin is carefully removed along with some surrounding healthy tissue to ensure complete removal of abnormal cells. Mohs micrographic surgery may be used in certain cases for tissue-sparing removal with microscopic examination during the procedure. Follow-up includes regular skin checks to monitor for new lesions or recurrence. In some cases, topical treatments like immune response modifiers may be considered, but surgery remains the mainstay. Early detection and removal are crucial to prevent progression to invasive melanoma.