Publications by authors named "W Omata"

Vulvar and vaginal melanomas (VVMs) are rare malignancies, but they are relatively more common among Asian women. This makes the collection of data on VVMs in this population crucial. Moreover, no cohort studies have examined and compared the effects of immune checkpoint inhibitors (ICIs) on VVM in Asian women.

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Mucosal malignant melanoma (MMM) is a rare subtype of malignant melanoma with a more aggressive biological behavior than cutaneous melanoma (CM). Owing to its rarity, it is necessary to accumulate information on treatments, especially in Asians, in whom MMM occurs more frequently than in Caucasians. In this study, we investigated the efficacy and adverse events (AEs) of nivolumab plus ipilimumab therapy (NIVO+IPI) versus immune checkpoint inhibitor (ICI) monotherapy (PD-1) in Japanese patients with MMM.

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We report a case of secondary adrenal insufficiency due to nivolumab. An 83-year-old man with acral lentiginous types of melanoma on the right sole visited our department in March 2017. He received primary surgery at referred hospital in June 2017, and pathological stage was IIIC (pT3bN3M0) according to AJCC (American Joint Committee on Cancer) 7th edition criteria.

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Assessment of treatment efficacy of immune checkpoint inhibitors in melanoma patients is difficult as the response to these therapies varies among patients or lesions. The clonal evolution of cancer during immune checkpoint blockade therapy could cause treatment resistance. We investigated the potential of liquid biopsy in monitoring the mutational profiles of metastatic melanoma during immunotherapy.

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Aim: The single nucleotide polymorphism (SNP) c.415C>T in exon 3 of affects thiopurine-induced leukopenia in Asian patients with Crohn's disease. Meanwhile, three additional genetic variants of were reported in patients with acute lymphoblastic leukemia.

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