ABSTRACT
A 47-year-old woman was referred to our hospital with recurring lower abdominal pain persisting for more than 2 weeks. Imaging modalities showed small bowel obstruction caused by a mass lesion in the terminal ileum. Despite undergoing fasting, rehydration, and decompression through an ileus tube, her symptoms persisted. Furthermore, the condition deteriorated on day 4, with the onset of her menstrual period. An emergency surgery was conducted on the 7th day after hospitalization. Surgical observations indicated severe stenosis around the ileocecal valve and ileal perforation approximately 40cm from the oral stricture. As a result, ileocecal resection was performed. Pathological examination revealed endometrial tissue infiltration through the mucosal lamina propria to the ileal subserosa. Thus, the patient was identified with intestinal endometriosis of the ileocecum. Endometriosis of the small bowel is an uncommon condition that eventually causes intractable bowel obstruction. Although preoperative diagnosis is considered challenging, intestinal endometriosis should be included in the differential diagnosis in cases of bowel obstruction in women of childbearing age.
Subject(s)
Endometriosis , Ileal Diseases , Intestinal Obstruction , Intestinal Perforation , Humans , Female , Endometriosis/complications , Middle Aged , Intestinal Obstruction/etiology , Intestinal Obstruction/surgery , Intestinal Obstruction/diagnostic imaging , Intestinal Perforation/surgery , Intestinal Perforation/etiology , Intestinal Perforation/diagnostic imaging , Ileal Diseases/etiology , Ileal Diseases/surgery , Ileal Diseases/diagnostic imagingABSTRACT
A 77-year-old patient was admitted to our hospital for the further examination of melena. A computed tomography scan detected two submucosal tumors (SMTs) in the stomach and jejunum. Double-balloon endoscopy revealed the presence of a delle on the jejunal SMT, suggesting that the SMT was the origin of the gastrointestinal bleeding. Both tumors were surgically resected and subsequently diagnosed via histology as gastrointestinal stromal tumors (GISTs). Furthermore, the two GISTs had different mutations in the c-kit gene, suggesting that they were derived from different clonal origins. This report depicts an extremely rare case of multiple synchronous sporadic GISTs in the stomach and jejunum.
Subject(s)
Gastrointestinal Stromal Tumors/pathology , Jejunal Neoplasms/pathology , Stomach Neoplasms/pathology , Aged , Gastrointestinal Stromal Tumors/diagnosis , Gastrointestinal Stromal Tumors/genetics , Humans , Jejunal Neoplasms/genetics , Jejunum , Male , Proto-Oncogene Proteins c-kit/genetics , Stomach Neoplasms/genetics , Tomography, X-Ray ComputedABSTRACT
Dechlorination of 1,1-bis(4-chlorophenyl)-2,2,2-trichloroethane (DDT) was catalyzed by a hydrophobic vitamin B(12), heptamethyl cobyrinate perchlorate, with a visible light irradiation system containing a [Ru(ii)(bpy)(3)]Cl(2) photosensitizer, and the hydrophobic vitamin B(12) showed high catalytic efficiency and stability during the reaction.
Subject(s)
Chlorine/chemistry , DDT/chemistry , Light , Photosensitizing Agents/chemistry , Vitamin B 12/chemistry , Catalysis , Hydrophobic and Hydrophilic Interactions , Photochemistry , Potentiometry , RadiationABSTRACT
The controlled-potential electrolysis of 1,1-bis(4-chlorophenyl)-2,2,2-trichloroethane (DDT) was carried out at -1.4 V vs. Ag-AgCl in the presence of a hydrophobic vitamin B12, heptamethyl cobyrinate perchlorate. DDT was dechlorinated to form 1,1-bis(4-chlorophenyl)-2,2-dichloroethane (DDD), 1,1-bis(4-chlorophenyl)-2,2-dichloroethylene (DDE), 1-chloro-2,2-bis(4-chlorophenyl)ethylene (DDMU) and 1,1,4,4-tetrakis(4-chlorophenyl)-2,3-dichloro-2-butene (TTDB)(E/Z), and quantitative recovery of the catalyst after the electrolysis was confirmed by electronic spectroscopy. A photo-sensitive intermediate having a cobalt-carbon bond formed during the electrolysis was characterized by electronic spectroscopy. A mechanism for the formation of various dechlorinated products was investigated by using deuterium solvents and various spectroscopic measurements such as UV-VIS and the EPR spin-trapping technique.
Subject(s)
DDT/chemistry , Insecticides/chemistry , Soil Pollutants , Vitamin B 12/chemistry , Catalysis , Cobalt/chemistry , Electrolysis , Hydrophobic and Hydrophilic InteractionsABSTRACT
Hydrophobic vitamin B(12) was covalently immobilized onto a platinum electrode surface, and the immobilized complex exhibits Co(ii)/Co(i) redox couple and in situ the Co(i) species reacts with phenethyl bromide to form styrene under irradiation with visible light with a turnover number of over 6000 for 1 h.
