Five New Records of Soil-Derived in Korea: , , , , and .

Despite the huge worldwide diversity of (, ), only about 22 species have been reported in Korea. Thus, between 2013 and 2015, soil-derived spp. were isolated to reveal the diversity of Korean .

Isolated pulmonary cryptococcosis in an immunocompetent boy.

Pulmonary cryptococcosis is rare in immunocompetent subjects. Here, we present the case of a 16-year-old boy who was referred to our pediatric department for the management of multiple consolidations detected on chest radiography, which was routinely performed when the patient was being evaluated for an ankle fracture. Fine needle aspiration biopsy was performed, and the definitive diagnosis was established as cryptococcal pneumonia.

Gastropericardial fistula-induced pyopneumopericardium after esophagectomy with esophagogastrectomy.

Gastropericardial fistula is an acquired disorder presenting as an abnormal communication between the stomach and the pericardium, with a rare incidence and extremely high mortality rate. We recently experienced a case of life-threatening gastropericardial fistula occurring as an unusual complication after an esophagectomy with an esophagogastrostomy for esophageal cancer treatment. A 68-year-old man with a history of esophagectomy and esophagogastrostomy using the gastric pedicle for the esophageal cancer 13 years ago, visited the hospital with a complaint of dyspnea for 3 days.

Unusual recurrence in ureters and maxillary sinus of Langerhans cell histiocytosis involving mastoid bone.

We present a case of Langerhans cell histiocytosis (LCH) diagnosed in the mastoid bone. The tumor recurred in the ureter and maxillary sinus mucosa two years later. The diagnosis of LCH was based on morphology and immunohistochemistry.

A distinct expression pattern and point mutation of c-kit in papillary renal cell carcinomas.

KIT is expressed not only in tumors derived from hematopoietic stem cells, melanocytes, germ cells, mast cells, and interstitial cells of Cajal, but also in other malignancies such as chromophobe renal cell carcinoma. This pattern of KIT expression prompted us to investigate the expression and mutation of c-kit gene exons 9, 11, 13, 17, and intron 17 in the different subtypes of renal cell carcinomas (n=66) and non-neoplastic kidneys (n=12). We found that KIT showed strong immunoreactivity in the cytoplasm of papillary renal cell carcinomas (100%), but on the cell membranes of chromophobe renal cell carcinomas (100%).