An extralingual Ectomesenchymal chondromyxoid tumor with RREB1::MRTFB fusion: a rare case report of plantar fascia involvement

We report, for the first time, a mesenchymal chondromyxoid tumor with an RREB1::MRTFB fusion gene occurring in the foot. This case expands the known distribution of ECT beyond the tongue. Accurate differential diagnosis should rely on thorough histological assessment, combined with immunohistochemical and molecular analyses.