Most paratracheal masses are of thyroid origin. We describe two cases of vocal fold paralysis that were caused by unusual paratracheal masses. In one case, a 35-year-old man was found to have a malignant lymphoma that originated in the mediastinum and extended above the clavicle. The other patient was a 53-year-old man with an enlarged left thyroid lobe, tumor invasion of the adjacent larynx an...

Background and Objectives: In the most Iranian hospitals the internal air is cooled by a system comprising centrifugal blower fan and excelsior filters. Because amoeba can be present in air and dust it may enter into filters of cooling systems. It has been suggested that diffusion of amoebae cyst through air canals may contribute to various types of nosocomial infections. This ...

The effects of extraction technique, sample size, soil moisture level, and overflow rate on recovery of Globodera rostochiensis and (or) Heterodera schachtii cysts from organic soils were investigated. A modified Fenwick can (MFC) and an underflow elutriator (UE) described in this paper were evaluated and compared for cyst recovery efficiency and amount of organic flotsam collected. The MFC and...

A retrospective review of 126 surgically-proven cases of hydatid cyst of the liver was performed. Sixty percent of the patients were in the third and fourth decades of life. The most common presenting complaint was right upper abdominal pain and/or fullness sensation (92%). Duration of symptoms was more than two months in 61 %. One third of the patients had more than one cyst in the liver....

Aneurysms of the azygos vein are rare and can sometimes mimic a paratracheal or posterior mediastinal mass. It is important to confirm the diagnosis with radiologic tools before performing invasive procedures, which carry the risk of hemorrhage. Here, we present a case in a 79-year-old asymptomatic patient of an increasing azygos vein aneurysm that mimicked a growing paratracheal mass. Review o...

Paratracheal air cysts (PTACs) are frequently and incidentally found on computed tomography (CT) examinations of the chest, neck, and spine. Aetiology, pathophysiology, clinical and radiological relevance, and accompanying airway and parenchymal pathologies of PTACs are not known. A limited number of studies have discussed the association between PTACs and radiological or clinical abnormalities...

Purpose. To determine the association between the progression of upper lung fibrosis and paratracheal air cysts (PACs) size. Materials and Methods. The thoracic CT images of 4573 patients were reviewed for the prevalence, size, and location of PACs and their communication with trachea. In addition, the presence of upper lung fibrosis, emphysema, and bronchiectasis was evaluated in patients with...

PURPOSE We aimed to determine the prevalence of paratracheal air cysts (PTACs) and the relationship of PTACs with emphysema and bronchiectasis through retrospective analysis of multidetector computed tomography (MDCT) findings. METHODS MDCT findings of 1027 consecutive patients who underwent routine thorax examination between January 2012 and January 2013 were evaluated retrospectively for th...