C43.21

Clinical Causes: Prolonged exposure to ultraviolet (UV) radiation from sunlight or artificial sources History of frequent sunburns or intense sun exposure in childhood Presence of atypical moles or numerous moles on the skin Fair skin, light hair, and light eye color, which increase susceptibility History of skin injury or trauma to the ear region Inherited genetic factors and family history of melanoma

Key Symptoms: A new or changing dark mole or spot on the ear Asymmetrical pigmented lesion with irregular borders Color variations within the lesion, including shades of brown, black, or even red and white Itching, tenderness, or bleeding in the affected area Scaly, crusted, or ulcerated skin lesions Persistent soreness or discomfort on the ear Palpable lump or thickening in the ear or surrounding tissues

Diagnosis Path: Diagnosis of malignant melanoma involves a thorough clinical examination, often supported by dermoscopy to assess pigmented lesions more clearly. A biopsy is essential to confirm the diagnosis, where a small tissue sample from the lesion is examined under a microscope. Additional imaging studies such as ultrasound, CT scans, or MRI may be used to determine if the cancer has spread beyond the skin.

Treatment Protocols: Treatment typically involves surgical removal of the melanoma with adequate margins to ensure complete excision. Depending on the stage and location, other therapies may include: - Sentinel lymph node biopsy to evaluate spread to nearby lymph nodes - Immunotherapy to stimulate the body's immune response against melanoma - Targeted therapy if specific genetic mutations are identified - Radiation therapy, in cases where surgical removal is not feasible or for specific metastatic sites Follow-up care involves regular skin checks and monitoring for recurrence or metastasis to optimize outcomes.