Publications by authors named "K Masai"

A pheochromocytoma is a malignant tumor with metastatic potential. Moreover, the cardiovascular effects of abnormal amounts of catecholamines resulting from pheochromocytoma impact prognosis. Resection of the primary tumor is useful for reducing catecholamine production; however, the significance of resection of metastases remains unclear.

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Chronic traumatic encephalopathy (CTE) has attracted attention due to sports-related head trauma or repetitive mild traumatic brain injury (mTBI). However, the pathology of CTE remains underexplored. Reproducible and quantitative model of CTE has yet to be established.

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Objectives: Cases of severe pectus excavatum presenting with worsening cardiopulmonary symptoms in the upright position have been reported. However, the underlying mechanism remains unclear. We evaluated posture-related morphological changes of the thorax in patients with pectus excavatum.

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Article Synopsis
  • The Nuss procedure is a minimally invasive surgery for pectus excavatum that has seen various improvements, though the effects of using multiple bars on surgical outcomes are still uncertain.
  • A study evaluated 225 patients who underwent the procedure, comparing outcomes between those with 1-2 bars and those with 3 or more bars; results showed more asymmetric conditions and postoperative pleurisy in the group with more bars.
  • The study concluded that while using multiple bars can help correct asymmetric cases, there is an increased risk of postoperative complications, particularly pleurisy, that should be monitored.
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Purpose: Salvage surgery for primary lung cancer is expected to become increasingly common. This study aimed to clarify the survival impact of pathologic characteristics after salvage surgery.

Methods: Consecutive patients who underwent salvage surgery following definitive chemoradiotherapy or systemic therapy for initially unresectable lung cancer from 2010 to 2020 were enrolled in this study.

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