The present study demonstrates that dermatoscopic vascular morphology, particularly polymorphous vascular patterns, is strongly associated with invasive tumor growth and recurrence in basal cell carcinoma. By integrating dermatoscopic, clinicopathologic, and morphometric data, the findings provide evidence that vascular complexity represents a clinically meaningful surrogate of underlying tumor aggressiveness.

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From a clinicopathologic perspective, the results are consistent with previous studies identifying an infiltrative growth pattern, margin involvement, and perineural invasion as key determinants of recurrence in basal cell carcinoma.7,12,13 These features reflect the biological capacity of the tumor to extend beyond clinically visible borders, leading to incomplete excision and local relapse. The present study extends these observations by demonstrating that such aggressive characteristics are closely linked to specific dermatoscopic vascular patterns, thereby establishing a connection between non-invasive imaging and histopathologic behavior.

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A particularly important finding is the dissociation between overall tumor size and invasive growth. While tumors exhibiting polymorphous vascularity were smaller in dermatoscopic and gross histologic dimensions, they showed significantly greater invasive depth. This observation supports the notion that horizontal tumor spread does not adequately reflect biological aggressiveness, whereas vertical invasion is a more relevant predictor of clinical outcomes.14 Similar observations have been reported in recent studies emphasizing the prognostic value of tumor thickness and invasive characteristics over surface dimensions in non-melanoma skin cancers.

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Dermatoscopy has long been established as a diagnostic tool for basal cell carcinoma, with characteristic features such as arborizing vessels and ulceration widely described. However, its role in prognostication has remained limited. Recent literature suggests that vascular morphology may reflect underlying tumor angiogenesis and stromal remodeling. The findings of the present study support this concept and further demonstrate that polymorphous vascular patterns are not merely descriptive but are strongly associated with invasive growth, infiltrative architecture, and recurrence. This aligns with emerging evidence indicating that vascular heterogeneity reflects dynamic tumor–microenvironment interactions and may serve as an indicator of aggressive tumor biology.11,15

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In contrast, other dermatoscopic features, including ulceration and border definition, did not demonstrate significant predictive value in this cohort. This suggests that surface-level changes may be less informative than vascular architecture in assessing tumor behavior. Clinically, this distinction is relevant, as it shifts the dermatoscopic focus toward microvascular patterns, potentially enabling earlier identification of high-risk lesions before histopathologic confirmation.

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The association between polymorphous vascularity and infiltrative growth pattern observed in this study further supports the hypothesis that dermatoscopic features reflect underlying structural organization. Infiltrative tumors are characterized by irregular tumor islands, stromal interaction, and subclinical extension, features that may manifest dermatoscopically as vascular complexity and heterogeneity. This relationship has been suggested in prior dermatoscopy–histopathology correlation studies, although it has not been consistently quantified.7,8

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From a clinical standpoint, the results have direct implications for patient management. Current risk stratification for basal cell carcinoma relies primarily on histologic subtype and tumor size, parameters that may underestimate aggressive behavior in some cases. The present findings suggest that incorporation of dermatoscopic vascular assessment into routine evaluation could improve preoperative risk stratification. In particular, the identification of polymorphous vascular patterns may alert clinicians to the possibility of deeper invasion and a higher risk of recurrence, thereby influencing surgical planning, margin selection, and follow-up strategies.

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Several limitations should be acknowledged. The retrospective design introduces potential selection bias, and the follow-up period may not capture late recurrences. Additionally, the presence of near-complete separation in some variables, particularly vascular patterns, limits the applicability of multivariate modeling. However, this phenomenon reflects the strength of the observed associations rather than a methodological limitation and underscores the potential clinical relevance of these findings.

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In conclusion, the present study demonstrates that dermatoscopic vascular patterns, particularly polymorphous vascularity, are strongly associated with invasive tumor depth, adverse histopathologic features, and recurrence in basal cell carcinoma. These findings support the concept that dermatoscopy can provide not only diagnostic but also prognostic information, bridging the gap between clinical imaging and tumor biology. The integration of dermatoscopic and morphometric parameters offers a practical, clinically applicable approach to risk stratification, with the potential to improve the management of patients with basal cell carcinoma.