نتایج جستجو برای: head and neck tumor
تعداد نتایج: 16923413 فیلتر نتایج به سال:
Relevance: Basal cell skin cancer is the most common malignant tumor originating from epithelial cells. Reconstruction of altered tissues
 and organs an urgent significant medical social problem. In particular, head neck injuries are particularly difficult for functional,
 cosmetic, aesthetic reconstruction.
 The article aimed to share experience performing reconstructive plastic...
Background and Aim: Cutaneous squamous cell carcinoma (CSCC) is the second most common skin cancer. Mast cells may play a role in tumor progression and metastasis by increasing angiogenesis. The aim of this study was to investigate the role of mast cells by increasing angiogenesis in invasion of head and neck cutaneous squamous cell carcinoma. Materials and Methods: In this cross-sectional stud...
fewer than 15% of lipomas occur in the head and neck. lipomas of the larynx are very rare benign laryngeal tumors (0.6%). to date less than 100 case of laryngeal lipoma have been reported in the literature.clinical manifestation include progressive horseness, dyspnea, and even dysphagia. in the direct exam smooth or pedunculated mass is seen in the larynx and sometimes if tumor is large enough ...
Syringocystadenoma papilliferum is an uncommon benign apocrine gland tumour, mostly of congenital or early childhood onset, affecting head and neck. In addition, nevus sebaceous is commonly associated with this tumor. Here, we document three cases of syringocystadenoma papilliferum with many atypical features, such as the involvement of rare sites (abdomen, axilla and thigh), absence of nevus s...
malignant peripheral nerve sheath tumor (mpnst), the principle malignancy of peripheral nerve origin, though rare in the general population, occurs with excessive frequency among patients with neurofi bromatosis. this tumor always arises in soft-tissues, usually found in the lower extremities and only 10-12% of all lesions occur in the head and neck region, which makes it a rare entity. the pri...
This paper presents an overview of the first HEad and neCK TumOR (HECKTOR) challenge, organized as a satellite event 23rd International Conference on Medical Image Computing Computer Assisted Intervention (MICCAI) 2020. The task challenge is automatic segmentation head neck primary Gross Tumor Volume in FDG-PET/CT images, focusing oropharynx region. data were collected from five centers for tot...
Hypoxia is a common feature of solid tumors that occurs across a wide variety of malignancies. Hypoxia and anemia (which contributes to tumor hypoxia) can lead to ionizing radiation and chemotherapy resistance by depriving tumor cells of the oxygen essential for the cytotoxic activities of these agents. Hypoxia may also reduce tumor sensitivity to radiation therapy and chemotherapy through one ...
Paragangliomas are neoplasms of neural crest origin. In the head and neck, they uncommonly involve the larynx. The distinction between paragangliomas and other neuroendocrine tumors can be difficult. Precise diagnosis is important in order to optimize patient treatment. Diagnosis relies mostly on histopathologic examination followed by immunohistochemistry. Here we report a 77-year-old woman wi...
PURPOSE OF REVIEW Although head and neck masses represent a common entity in children, malignancy is uncommon. The otolaryngologist may be the first physician to see these children, and early recognition of malignancy is of obvious importance. This review aims to discuss the cause, diagnosis, investigation, treatment options, and prognosis for the most common head and neck malignancies of child...
Endovascular tumor embolization as adjunctive therapy for head and neck cancers is evolving and has become an important part of the tools available for their treatment. Careful study of tumor vascular anatomy and adhering to general principles of intra-arterial therapy can prove this approach to be effective and safe. Various embolic materials are available and can be suited for a given tumor a...
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