NR 283 Pathophysiology Paper

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Chamberlain University

NR-283: Pathophysiology

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NR 283 Pathophysiology Paper

Introduction of Disease

Melanoma is a highly aggressive form of skin cancer originating from melanocytes, the specialized cells responsible for producing melanin, the pigment that gives skin its color. These cells reside at the junction between the epidermis and dermis and play a protective role by producing melanin in response to ultraviolet (UV) light exposure. Although melanoma is not the most frequently diagnosed skin cancer, it accounts for the majority of skin cancer–related deaths due to its metastatic potential. Over the last thirty years, the prevalence of malignant melanoma has risen significantly, now ranking as the fifth most common cancer in the general population (Harting, 2014). Despite its rising incidence, early detection and preventive measures—such as avoiding excessive sun exposure, using sunscreen, and monitoring skin changes—can substantially reduce the risk of developing melanoma.

Etiology

The development of melanoma is primarily linked to excessive exposure to UV radiation, which can arise from natural sunlight or artificial sources like tanning beds. While genetic factors may influence individual susceptibility, no definitive gene has been conclusively associated with melanoma risk (Porth & Gaspard, 2014). Skin pigmentation provides some natural protection, with melanin absorbing UV radiation and mitigating DNA damage. Individuals with fair skin, light hair, light-colored eyes, numerous freckles, or multiple moles are particularly vulnerable to melanoma. Men are generally at higher risk than women. Additional risk factors include severe sunburns during childhood, a family history of melanoma, and previous melanoma diagnoses (Harting, 2014). UV exposure is not limited to outdoor settings; reflective surfaces like snow and extended periods in vehicles with sunlight exposure through windows can intensify UV impact.

Pathophysiology Processes

Melanoma develops when melanocytes undergo genetic mutations due to UV radiation damage. These mutations disrupt normal cell cycle regulation, causing uncontrolled cell growth and eventual tumor formation. The progression of melanoma often begins with dysplastic changes, where cells exhibit abnormal morphology, and may advance to anaplasia, reflecting a loss of differentiation and structural organization (VanMeter & Hubert, 2014). Although hereditary factors may contribute to melanoma susceptibility, the exact genetic mechanisms remain unclear. The body’s DNA repair systems attempt to correct UV-induced damage, but when mutation accumulation outpaces repair, abnormal cells proliferate, promoting cancer development. Ongoing research is essential to uncover molecular targets for melanoma prevention, early detection, and treatment.

NR 283 Pathophysiology Paper Table

References

Harting, D. (2014). Malignant Melanoma. Radiation Therapist, 23(1), 51–76.

Porth, C. M., & Gaspard, K. J. (2014). Essentials of pathophysiology: Concepts of altered states (4th ed.). Philadelphia, PA: Lippincott Williams and Wilkins.

Schub, T., & Holle, M. N. (2017). Melanoma. CINAHL Nursing Guide.

VanMeter, K. C., & Hubert, R. J. (2014). Gould’s pathophysiology for the health professions (5th ed.). St. Louis, MO: Elsevier Saunders.