In addition to meningiomas, poromas, and porocarcinomas, YAP1::MAML2 gene fusions have been detected in most metaplastic thymomas (Vivero et al. 2020, Zhao et al. 2021), about one-third of retiform hemangioendotheliomas and composite hemangioendotheliomas (Antonescu et al. 2020, Koutlas et al. 2021) (Figure 1e,f), a specific morphologic variant of myxoinflammatory fibroblastic sarcoma (Perret et al. 2022), a series of malignant undifferentiated epithelioid neoplasms (Dermawan et al. 2023), schwannoma (Karajannis et al. 2022), and nasopharyngeal carcinoma (Valouev et al. 2014). The gene discussed is MAML2; the disease is Poroma.