Abstract
Mediastinal cysts are typically of bronchogenic, thymic or neurenteric origin, but may also represent oesophageal duplication. Posterior paravertebral mediastinal Müllerian cysts of undetermined pathogenesis are very rare occurrences. The first case of a ciliated cyst arising in the mediastinum, of probable Müllerian origin, was reported by Hattori in 2005, which gave rise to the name cyst of Hatorri (COH) The number of reported cases in literature of a similar nature have since then increased significantly. One of the main concerns about this pathology is the possibility of malignant transformation of the Müllerian tissue. Over the course of this paper we will discuss the pathogenesis, immunohistochemistry and its role in differential diagnosis as well as optimal treatment of such cysts.
Highlights
The purpose is to evaluate the prognostic significance of lung parenchymal density during percutaneous coaxial cutting needle lung biopsy (PNLB)
This study aims to evaluate the possibility that lobar lung parenchymal density and lung parenchymal density relative to the trajectory path are linked to an increased risk of pneumothorax during PNLB
Lung parenchymal attenuation that was in the trajectory path of the needle (Figure 1) was determined by placing the routinely used region of interest (ROI) within the lung segments of greatest dimension in the transaxial plane and was calculated by using the average measurement over three ROI
Summary
The purpose is to evaluate the prognostic significance of lung parenchymal density during percutaneous coaxial cutting needle lung biopsy (PNLB). Conclusion: Lobar parenchymal density and lung parenchymal density anterior to the lesion and posterior to the chest wall in the needle trajectory path could be used as predicting parameters in patients undergoing PNLB who sustained a pneumothorax. These findings can help interventional radiologist further assess risk of pneumothorax when preforming such procedure. In order to facilitate repeat sampling and decrease procedural duration, the coaxial technique for percutaneous lung lesion biopsy can be used This method achieves all the aforementioned objectives without increasing the number of passes through the pleura [1]. The success rates in many quality improvement task forces are reliant on a combination of factors such as interventionist skill set, years of experience and rate of complications post PNLB
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