Abstract
Spitz melanocytic neoplasms exhibit frequent chromosomal rearrangements leading to recurring gene fusions, such as ALK fusions. TPM3 and DCTN1 emerge as the predominant fusion partners of ALK , although less common partners such as NPM1 , TPR , CLIP1 , GTF3C2 , MLPH , EEF2 , MYO5A , and KANK1 have also been documented. Although ALK fusions are primarily associated with Spitz nevi or atypical Spitz tumors, instances of Spitz melanoma with ALK fusions documented in the English literature are exceedingly rare. Here, we present a case of Spitz melanoma harboring SLC20A1::ALK fusion, highlighting a novel fusion transcript not previously reported in Spitz melanocytic neoplasms, including Spitz melanomas. In addition, the tumor exhibits multiple aberrant chromosomal alterations characteristic of melanoma, along with a somatic mutation in GRM3 .
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