D03.0

Clinical Causes: Excessive exposure to ultraviolet (UV) radiation from sunlight or tanning beds. History of sunburns, especially during childhood. Fair skin, light hair, and light eyes increase susceptibility. Presence of numerous moles or atypical moles. Genetic predisposition to skin cancers. Immunosuppression due to medical conditions or medications.

Key Symptoms: Appearance of a new pigmented lesion on the lip. Changes in an existing mole or spot, such as size, shape, or color. Irregular borders or asymmetry of the lesion. Uneven coloration, including shades of brown, black, or other colors. Lesion that does not heal or bleeds easily. Persistent soreness or discomfort on the affected lip.

Diagnosis Path: Diagnosis typically involves a thorough clinical examination by a healthcare professional, focusing on the visual assessment of the lesion. To confirm the presence of melanoma in situ, a biopsy is performed, where a small tissue sample is removed and examined microscopically. Additional diagnostic tools such as dermoscopy can aid in evaluating suspicious lesions, and imaging studies may be used to assess the extent if invasive melanoma is suspected later. Early diagnosis is crucial for effective management and treatment.

Treatment Protocols: The primary treatment for melanoma in situ of the lip is surgical removal of the lesion with clear margins to eliminate all cancerous cells. Techniques include excisional surgery, where the lesion and a margin of surrounding healthy tissue are removed, or Mohs micrographic surgery for precise removal while conserving tissue. Following surgery, patients may undergo regular monitoring for recurrence or new lesions. Other options, depending on the case, can include topical treatments or laser therapy; however, surgical excision remains the most common and effective approach. Preventive strategies involve sun protection and regular skin checks.