Abstract Parotid gland is a rare site of metastasis from gastrointestinal (GI) tract primary cancer. Here, we present an interesting case report parotid unknown with probable lower GI as cancer, normal colonoscopy and upper endoscopy. This highlights the importance immunohistochemistry in taking treatment decisions during dilemmatic situations.

background: ebt and ebt3 radiochromic films have been used in radiotherapy dosimetry for years. objective: the aim of the current study is to compare ebt and ebt3 radiochromic films in dosimetry of radiotherapy fields for treatment of parotid cancer. methods: calibrations of ebt and ebt3 films were performed with identical setups using a 6 mv photon beam of a siemens primus linac. skin dose was...

Introduction: Background: Radiotherapy of parotid tumors is achieved by different radiotherapy techniques. So they deliver the dose to organs at risk such as contralateral parotid, temporal lobe & spinal cord. The consequences of high dose to OARs are xerostomia, Temporal lobe necrosis and loss of hearing. Purpose: The aim of this study was to compare different treatment tech...

Introduction: Xerostomia is the most common complication due to radiation–induced damage to salivary glands in head and neck cancer radiotherapy and it reduces quality of life. Parotid glands are main glands which they are account for secretion of stimulated saliva. Studies have demonstrated that mean tolerance parotid’s radiation dose under 26-30 Gy result in an increase in t...

BACKGROUND Carcinoma ex pleomorphic adenoma (CXPA) of the parotid gland is a high-grade cancer and the prognosis of this cancer has not been compared with non-CXPA high-grade primary parotid cancer. METHODS Retrospective medical chart review of patients with surgically treated high-grade primary parotid cancer (21 CXPA and 52 non-CXPA) was performed with correlation with disease-specific surv...

Mucoepidermoid carcinoma (MEC) is the most
 common malignant tumor of salivary gland and
 most commonly seen in parotid. Oncocytic
 mucoepidermoid (OMEC) a rare
 subtype. Here, we aimed to present histological,
 immunohistochemical, and molecular results a
 28-year-old female patient followed for endometrial
 cancer, whether mass right parotid primary or metas...

Background: Three-dimensional conformal radiotherapy (3D-CRT) and intensity-modulated radiotherapy (IMRT) techniques are used for the treatment of patients with laryngeal cancer. Objective: This study aimed to investigate the effects of these 2 treatment techniques on the planning target volume (PTV) (laryngeal cancer), dose homogeneity, dose of organs at...

Parotid gland cancer; 3DCRT; Postoperative radiotherapy techniques; Dose distribution Abstract Introduction: Postoperative radiotherapy of the parotid gland could be achieved with various radiotherapy techniques. However they irradiate differently the surrounding organs at risk (OARs) in particular the cochlea, oral cavity & contralateral parotid causing significant increase in the risk of oral...

OBJECTIVE We analyze parotid specimens in patients treated with prophylactic parotidectomy for squamous cell carcinoma of the auricle greater than or equal to 2 cm to determine rates of metastasis and the efficacy of elective resection. STUDY DESIGN Case series with chart review. SETTING Cancer treatment center in Fort Worth, Texas, from 1998 to 2013. SUBJECTS AND METHODS The study includ...