Clinical Report: First Evidence of Metastatic Capability in Acral MYH10::ALK Fusion Superficial Mesenchymal Tumor
Overview
This case study presents the first evidence of metastatic capability in an acral MYH10::ALK fusion superficial mesenchymal tumor. A 23-year-old male developed metastatic disease following initial excision of the tumor, highlighting the potential aggressiveness of these rare neoplasms.
Background
Superficial ALK-rearranged soft tissue tumors are rare and can mimic other spindle cell tumors, complicating diagnosis. Understanding their clinical behavior is crucial, as they may present as indolent but can exhibit aggressive features, including metastasis. This case contributes to the limited knowledge regarding the long-term behavior of these tumors.
Data Highlights
No numerical data or trial data presented in the article.
Key Findings
A 23-year-old male presented with a purplish mass on the plantar left foot.
Histopathology revealed increased mitotic activity and strong cytoplasmic ALK expression.
Next-generation sequencing confirmed a MYH10::ALK fusion.
The patient developed metastatic disease after initial excision with positive margins.
This case broadens the spectrum of acral ALK-rearranged unclassified mesenchymal tumors.
Increased mitotic activity may indicate a more aggressive behavior in these tumors.
Clinical Implications
The findings emphasize the need for careful histologic, immunophenotypic, and molecular assessment in diagnosing ALK-rearranged tumors. Clinicians should maintain vigilance for potential metastatic behavior in these neoplasms, particularly those with increased mitotic activity.
Conclusion
This case highlights the metastatic potential of ALK-rearranged unclassified mesenchymal neoplasms and underscores the importance of thorough surgical management and follow-up.
