The aim of this study was to elucidate the role of percutaneous transhepatic biliary drainage (PTBD) in patients with duodenal stump leakage (DSL) and afference loop syndrome (ALS) postgastrectomy for malignancy or benign ulcer perforation. Percutaneous transhepatic biliary drainage (PTBD) is an interventional radiologic procedure used to promote bile drainage. Duodenal stump leakage (DSL) and afferent loop syndrome (ALS) can be serious complications after gastrectomy. From January 2002 through December 2014, we retrospectively reviewed 19 patients who underwent PTBD secondary to DSL and ALS postgastrectomy. In this study, a PTBD tube was placed in the proximal duodenum near the stump or distal duodenum in order to decompress and drain bile and pancreatic fluids. Nine patients with DSL and 10 patients with ALS underwent PTBD. The mean hospital stay was 34.3 days (range, 12 to 71) in DSL group and 16.4 days (range, 6 to 48) in ALS group after PTBD. A liquid or soft diet was started within 2.6 days (range, 1 to 7) in the ALS group and within 3.4 days (range, 0 to 15) in the DSL group after PTBD. One patient with DSL had PTBD changed, and 2 patients with ALS underwent additional surgical interventions after PTBD. The PTBD procedure, during which the tube was inserted into the duodenum, was well-suited for decompression of the duodenum as well as for drainage of bile and pancreatic fluids. This procedure can be an alternative treatment for cases of DSL and ALS postgastrectomy.Key words: Gastrectomy -PTBD -Duodenal stump leakage -Afferent loop syndrome P ostoperative complications after gastrectomy are difficult for both patients and surgeons. In the past, most of the major complications after gastrectomy required re-operation. The rate of reoperation for these complications ranges from 2.8% to 10%. 1-3 After gastrectomy, duodenal stump leak-

Background and Objectives：Unilateral maxillary sinus lesions are relatively common but may occur in variety of causes. Therefore, accurate diagnosis and appropriate treatment are needed. The aim of this study is to review patients with unilateral maxillary sinus lesion who underwent surgical treatment and to analyze causes and characteristics of unilateral maxillary sinus lesions with literature review. Materials and Methods：A retrospective chart analysis was completed on 318 patients with unilateral maxillary sinus lesions who underwent surgical treatment from January, 2008 through May, 2018. Clinical history and data such as age, sex, symptoms of initial, radiologic and dental finding, operation type were collected from medical record. Results：Patients mean age was 50.7 years with slight male gender dominance. Most common type was sinusitis (42.7%), followed by odontogenic sinusitis (22.3%) and fungal ball (19.5%). In particular, the most common cause of odontogenic sinusitis was post dental surgery such as implant. Middle meatal antrostomy (90.9%) was accounted for a great part of surgery underwent to patients. Patients complained of post nasal discharge (62.9%), nasal obstruction (40.9%) and odor smell(35.2%) most commonly. Periapical lucency (35.8%) was the most common in CT finding followed by implant perforation (17.3%) and oroantral fistula (12.3%) in odontogenic sinusitis. Conclusions：Unilateral maxillary sinus lesions are relatively common, but they are increasing recently with dental procedures such as implant surgery, and serious adverse effects due to malignant tumors or improper treatment may occur, so accurate diagnosis and treatment are needed.