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Malignant neoplasm of skin — Clinical Guidelines

Overview

Malignant neoplasms of the skin encompass a variety of cancers originating from epidermal or adnexal tissues, including melanoma, basal cell carcinoma, squamous cell carcinoma, and rarer tumors like vimentinoma and trichoblastic fibroma. These malignancies vary in etiology, presentation, and management strategies.

Diagnosis

Clinical Presentation: Varied, from growing nodules to atypical lesions 2.

Histopathological Grading: Essential for dysplastic nevi; grading impacts management decisions 3.

Biopsy: Recommended for suspicious pigmented lesions and skin growths 5.

Differential Diagnosis: Important for distinguishing between benign and malignant lesions, e.g., differentiating trichoblastic fibroma from basal cell carcinoma 8.

Special Cases: Unusual presentations like hidradenoma papilliferum on non-typical sites (e.g., chest in males) require careful histopathological evaluation 6.

Management

Surgical Excision: Primary treatment for most malignant skin neoplasms 5.

Biopsy Triage: Teledermatology can effectively triage biopsy needs, though face-to-face consultations may offer advantages 5.

Grading and Monitoring: Regular monitoring for dysplastic nevi based on histopathological grading 3.

Immunohistochemistry: Useful in characterizing atypical fibroxanthoma and other tumors, aiding in diagnosis and prognosis 9.

Conservative Approaches: May be considered for low-risk lesions, depending on clinical context 3.

Special Populations

Pediatrics: Rare benign neoplasms like vimentinoma can occur, requiring careful differentiation 7.

Elderly: Atypical fibroxanthomas commonly affect elderly patients, often on sun-exposed areas 9.

Comorbidities: No specific guidelines provided in abstracts; management may need to consider systemic health status 9.

Key Recommendations

Perform histopathological examination for definitive diagnosis of suspicious skin lesions 3 5.

Utilize surgical excision as the primary treatment modality for confirmed malignant skin neoplasms 5.

Regularly monitor dysplastic nevi based on histopathological grading to guide management decisions 3.

Consider teledermatology for initial triage but prioritize face-to-face consultations when high suspicion of malignancy exists 5.

Employ immunohistochemistry to aid in the characterization and management of atypical fibroxanthoma and other complex skin tumors 9.

(Evidence: Moderate)

References

1 Liu Q, Jia W, Xia D, Yang L, Gu D. Disentangling the genetic relationship between malignant skin neoplasms and sepsis: Evidence from bidirectional Mendelian randomization. Medicine 2025. link 2 Wilson JL. Growing scalp nodule. The Journal of family practice 2020. link 3 Wall N, De'Ambrosis B, Muir J. The management of dysplastic naevi: a survey of Australian dermatologists. The Australasian journal of dermatology 2017. link 4 Kazakov DV, Bisceglia M, Calonje E, Hantschke M, Kutzner H, Mentzel T et al.. Tubular adenoma and syringocystadenoma papilliferum: a reappraisal of their relationship. An interobserver study of a series, by a panel of dermatopathologists. The American Journal of dermatopathology 2007. link 5 Shapiro M, James WD, Kessler R, Lazorik FC, Katz KA, Tam J et al.. Comparison of skin biopsy triage decisions in 49 patients with pigmented lesions and skin neoplasms: store-and-forward teledermatology vs face-to-face dermatology. Archives of dermatology 2004. link 6 Tanaka M, Shimizu S. Hidradenoma papilliferum occurring on the chest of a man. Journal of the American Academy of Dermatology 2003. link 7 Hermanns-Lê T, Nikkels AF, Ammar A, Piérard-Franchimont C, Piérard GE. Vimentinoma, an unusual neoplasm of the skin. Dermatology (Basel, Switzerland) 1994. link 8 Slater DN. Trichoblastic fibroma: hair germ (trichogenic) tumours revisited. Histopathology 1987. link 9 Leong AS, Milios J. Atypical fibroxanthoma of the skin: a clinicopathological and immunohistochemical study and a discussion of its histogenesis. Histopathology 1987. link 10 Walsh KM, Corapi WV. Tricholemmomas in three dogs. Journal of comparative pathology 1986. link90029-0) 11 Rubinstein N, Lijovetzky G, Knobler HY, Wexler MR, Peled IJ. Pilar tumor of the nose. Cutis 1985. link 12 Cruces Prado MJ, de la Torre C. Jadassohn's intraepidermal epithelioma. Dermatologica 1984. link

Malignant neoplasm of skin