Synovial cysts are found mainly in periarticular areas of the wrist, ankle, and knee, but also rarely in the temporomandibular joint (TMJ). Only 1 case of bilateral synovial cysts in the region of the TMJ has been reported. This case report described bilateral cysts in the TMJ in a 54-year-old Korean woman. T2-weighted magnetic resonance imaging (MRI) revealed bilateral oval cystic lesions lateral to the condylar capsule, whereas computed tomography (CT) apparently did not show the right hand side lesion. The cyst on the left side was surgically excised, and fine needle aspiration was performed on the right hand cyst. After 24 months, the long term follow-up showed no sign of recurrence.

In this study, we investigated the characteristics of Volatile Organic Compounds(VOCs) emission from painting and printing facilities in the Pyeongdong industrial complex in Gwangju. In addition, the objective was to understand the distribution characteristics of VOCs in the ambient air in industrial complexes affected by painting and printing facilities. The painting facility mainly emitted toluene, acetone, butyl acetate, 4-methyl-2-pentanone, ethyl acetate, 1-butanol, methyl ethyl ketone, m,p-xylene, o-xylene, 4-ethyltoluene, ethylbenzene, 3-ethyltoluene, and 1,2,4-trimethylbenzene. The main emission components in printing facilities were methyl ketone, ethyl acetate, acetone, 2-propanol, toluene, heptane, and butyl acetate. Ethyl acetate, toluene, 2-butanone, acetone, butyl acetate, 2-propanol, xylenes, and 4-methyl-2-pentanone were detected in the ambient air of the Pyeongdong industrial complex, consistent with the VOCs emitted by painting and printing facilities. The average concentration of seasonal TVOCs followed an order of winter > fall > spring > summer, whereas the concentrations of daytime and nighttime TVOCs were generally higher at night than those during the day, and the wind speed was greater during the day than it was at night. Based on a factor analysis of VOCs in the ambient air of Pyeongdong industrial complex, it is considered that organic solvents used in coating, printing, and electronics manufacturing facilities, as well as diesel vehicle emissions played a major role.