# A nurse is assessing a 45-year-old construction worker who presents to the clinic for a routine skin examination. Which assessment finding would be most concerning as a risk factor for developing skin cancer?

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## 문제

A nurse is assessing a 45-year-old construction worker who presents to the clinic for a routine skin examination. Which assessment finding would be most concerning as a risk factor for developing skin cancer?

## 보기

1. Presence of multiple irregular, asymmetrical moles with varying colors on the back and shoulders **✔ 정답**
2. Presence of dry, flaky skin patches on the arms and legs that are slightly raised
3. Presence of small, round, uniform brown spots scattered across the face and neck
4. Presence of mild erythema on the neck area with fine scaling

**정답: 1**

## 해설

Irregular, asymmetrical moles with varying colors meet ABCDE criteria for melanoma, requiring immediate evaluation in a construction worker with high sun exposure. Other options (dry skin, uniform spots, mild erythema) are benign or less concerning findings.

## 심화 해설

Correct Answer: 1

The assessment finding most concerning as a risk factor for developing skin cancer is the presence of multiple irregular, asymmetrical moles with varying colors on the back and shoulders. This clinical presentation is highly suspicious for dysplastic nevi, which are known precursor lesions with a potential for malignant transformation into melanoma.

In-Depth Pathophysiology and Clinical Rationale

The description in option 1 directly corresponds to the clinical features of a dysplastic nevus (DN). As defined in the provided guideline, a DN is characterized by histopathological findings of cytological atypia and architectural disorder [1]. The 2018 World Health Organization (WHO) classification system, which is currently in use, stratifies these lesions into two grades of atypia: low-grade and high-grade (severely atypical dysplastic nevus, or SDN) [1]. The clinical hallmarks of these lesions—asymmetry, irregular borders, and color variegation—are the visual manifestations of this underlying architectural disorder and atypical melanocytic proliferation. The presence of multiple such lesions signifies a higher total body burden of atypical melanocytes, which directly elevates the statistical probability that one of these lesions may accumulate the additional genetic hits required for progression to melanoma.

The management of these lesions is a complex clinical challenge precisely because they represent a point on a spectrum of melanocytic neoplasia. The guideline explicitly states that there are currently no definitive, universally accepted guidelines for managing patients with DN [1]. This lack of clear direction stems from the diagnostic difficulty and the uncertain malignant potential of these lesions, a category that pathology often terms Melanocytic Tumors of Uncertain Malignant Potential (MELTUMPs) [4]. The diagnostic challenge is compounded by significant inter-observer variability among pathologists when evaluating these borderline lesions [4]. Research into ancillary immunohistochemical markers, such as the combined loss of p16 and MTAP (which serves as a surrogate for CDKN2A genomic alterations at the 9p21 locus), is actively being pursued to help differentiate benign atypical nevi from early melanoma with greater accuracy [4]. The very existence of this intense diagnostic scrutiny underscores the inherent risk associated with these clinical findings.

Analysis of Incorrect Options

- Option 2 (Dry, flaky, slightly raised skin patches on arms and legs): This presentation is most consistent with actinic keratosis or a benign eczematous condition. While actinic keratoses are pre-malignant for squamous cell carcinoma, they do not carry the same lethal potential or direct link to melanoma as a dysplastic nevus. The question asks for the most concerning finding, and a lesion with direct melanocytic atypia takes precedence.

- Option 3 (Small, round, uniform brown spots on face and neck): This describes benign solar lentigines or common acquired nevi. The key features of uniformity in size, shape, and color are reassuring and indicate a benign, orderly growth of melanocytes without the architectural disorder or cytological atypia that defines a dysplastic nevus [1].

- Option 4 (Mild erythema on the neck with fine scaling): This is a non-specific finding likely related to sunburn, mild irritant dermatitis, or seborrheic dermatitis. It is an inflammatory process of the skin and does not represent a neoplastic proliferation of melanocytes, thus posing a negligible risk for skin cancer development.

NCLEX-RN Clinical Application

For the NCLEX-RN, this question tests your ability to prioritize a clinical finding based on its malignant potential. The core concept is the "ABCDE" rule of melanoma screening, which is directly reflected in the description of the lesions in option 1. The finding of a dysplastic nevus is a critical piece of assessment data that must be promptly reported to the healthcare provider for further evaluation, which may include dermoscopy. The meta-analysis on artificial intelligence in dermatology highlights that dermoscopy is the standard of care for melanoma diagnostics, and AI systems are being investigated as decision-support tools to improve the diagnostic performance of clinicians when evaluating such suspicious lesions . Your role includes not only recognizing these high-risk features but also understanding that the diagnostic uncertainty surrounding these lesions (as seen in the MELTUMPs concept [4]) and the variability in risk communication (as studied in patient decision aids ) make shared decision-making and specialist referral essential components of the nursing care plan.References (research sources)

- [1]Management of severe dysplastic nevus (high-grade dysplasia): Italian recommendations for good clinical practice.GuidelineMassone C, Argenziano G, Cota C, Ferrara G, Massi D, Cusano F, Fino M, Mitrova Z, Saulle R. (2026) · DOI: 10.4081/dr.2026.10672

- [4]The Diagnostic and Prognostic Role of Combined <i>p16</i> and <i>MTAP</i> Immunohistochemistry in Melanocytic Tumors of Uncertain Malignant Potential: A Comprehensive Review and Clinical Practice Analysis.Research articlePepe L, Fiorentino V, Pizzimenti C, Martini M, Santarpia M, Fazio A, Vaccaro M, Lentini M, Ieni A. (2026) · DOI: 10.3390/ijms27020971

## 임상 시나리오

Dysplastic Nevus Identification & Risk StratificationRecognizing Precursor Lesions for Melanoma
A dysplastic nevus is clinically identified by the ABCDE criteria: Asymmetry, Border irregularity, Color variegation, Diameter typically >6 mm, and Evolution over time. These features represent underlying architectural disorder and cytological atypia.

The presence of multiple dysplastic nevi significantly increases the risk of melanoma. Management involves total body skin examination and dermoscopy. Lesions with high-grade atypia often require excision with clear margins, while mildly atypical lesions may be monitored.

CautionDo not confuse benign solar lentigo (uniform color, round shape) with dysplastic nevi. A changing mole in an adult is melanoma until proven otherwise. When performing skin assessments, always inspect sun-exposed areas like the back and shoulders, but also check palms, soles, and mucosal surfaces.

## 핵심 개념

- **Dysplastic Nevus** — An atypical mole with histopathological findings of cytological atypia and architectural disorder, considered a precursor lesion with potential for malignant transformation into melanoma.
- **Melanoma** — A malignant tumor of melanocytes, often arising de novo or from a pre-existing nevus, characterized by the ABCDE criteria (Asymmetry, Border irregularity, Color variation, Diameter >6mm, Evolution).
- **ABCDE Rule** — A clinical screening tool for melanoma: Asymmetry, Border irregularity, Color variegation, Diameter greater than 6mm, and Evolving or changing lesion.
- **Actinic Keratosis** — A rough, scaly patch on the skin caused by years of sun exposure, considered a precancerous lesion that can progress to squamous cell carcinoma.
- **Solar Lentigo** — A benign, well-circumscribed, uniformly pigmented macule commonly known as an age spot or liver spot, resulting from chronic sun exposure.

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