Twehues and Islam (2011)	Twehues and Islam (2011)	Hong et al (2013)	Onuki et al (2014)
Age	37	54	54	56
Gender	Female	Female	Female	Female
Symptoms	Chest pain, cough	Chest pain, cough	Asymptomatic	Asymptomatic
Imaging Characteristics	5.6 x 4 cm right paratracheal mass	5.7 x 4.3 cm left lower lobe intrapulmonary lesion with internal septations	6.9 cm well-defined, homogeneous, non-enhancing mass posterior to bronchus intermedius	2.6 x 1.6 cm cyst-like lesion in anterior mediastinum
Biopsy Needle Size	22-guage	22-guage	22-guage	22-guage
Fluid Characteristics	Straw-colored, no growth on culture, no malignant cells	Straw-colored, no growth on culture, no malignant cells	Serous, no growth on culture, no malignant cells	White, viscous fluid, no malignant cells, culture grew α-hemolytic streptococcus
Adverse Events	None	None	Cavitary pneumonia in right upper lobe	Mediastinitis
Ultimately Required Surgery for Definitive Management	No	Yes	No	Yes