Direct formation of four5disubstituted carbazoles via regioselective dilithiation

A dural arteriovenous fistula (AVF) is a rare condition in a child and is not evident clinically. It is a type of an acquired cerebral vascular malformation that usually occurs after a thrombotic event of the cerebral venous sinuses. Dural AVF is not suspected clinically and is revealed through imaging done for evaluation of cranial symptoms. Therefore, it is essential to revisit the pathophysiology and the clinical situations leading to intracranial dural AVF. Equally crucial is identifying the imaging findings on computed tomography, or magnetic resonance imaging brain scans done as a preliminary work-up in these patients. However, for optimal management decision and prognostication of dural AVF, a digital subtraction angiography is essential. As the entire burden of establishing the diagnosis rests on the radiologists, we would like to present this rare case report highlighting both the clinical and imaging aspects and the management options available for dural AVFs.Complications related to the placement of a peripherally inserted central catheter are a common phenomenon and they can lead to acute complications which must be treated in an emergency regime. The aim of this study was to describe cases in their most practical and technical aspect, especially in complicated conditions. This was a descriptive case report of a 64 years old female patient who presented with a fractured peripherally inserted central catheter, migrated into the right heart chambers and inferior vena cava, and how the team arranged for its recovery by endovascular technique, in a frail patient who could not undergo to open surgery.The procedure was completed without any complications. The use of the endovascular technique allows a recovery of the foreign body in a short time, essential for a life-saving procedure; the interventional radiological approach allows less invasiveness in fragile patients and shorter hospitalization times.Primary bone lymphoma is a rare type of non-Hodgkin's lymphoma. It commonly arises from long bones such as the femur in the appendicular skeleton. The authors present a case of primary bone lymphoma of the clavicle, an uncommon location for this pathology, presenting as a painful supraclavicular lump in a 76-year-old woman. Magnetic resonance imaging and ultrasound examinations showed the typical feature of preservation of the bony cortex, and PET-CT revealed no alternative primary site of malignancy. This case highlights the importance of considering typical imaging characteristics of a lesion, even if it presents in an unusual site, as well as the value of completion imaging in clinical practice to secure a diagnosis.Bow Hunter's syndrome, also referred to as rotational occlusion of the vertebral artery, is caused by dynamic compression of a patient's dominant vertebral artery. We reported a case of successful clinical and imaging work up of Bow Hunter's Syndrome that occurred in a 79-year-old female patient. We discussed the clinical presentation, imaging findings, and subsequent management options of this rare syndrome. The gold standard for diagnosis is dynamic cerebral angiography, which allows the reproduction of symptoms with head turn greater than 30-45 degrees. Subsequent management is based on the underlying etiology causing rotational compression.Fetus in fetu (FIF) is a rare anomaly of diamniotic monochorionic twins, in which a malformed fetus resides in its twin's body. This report shows a case with the prenatal diagnosis of FIF at Tu Du hospital. A 23-year-old woman, first-time pregnant, presented at the hospital with an abdominal mass in the fetus at 31 weeks and 4 days of gestation. The ultrasound showed an abnormal mass with the images of calcified features located in the left hypochondriac region and the kidney's upper pole. These images had shapes of skull, femur, spine and became more apparent as the fetus grew. Then, the patient was monitored and delivered at our hospital. The infant was moved to the Children's Hospital 1 and diagnosed with FIF by ultrasound. The surgical resection was performed at 12 days of birth.In the 2016 World Health Organization renal tumor classification, the mixed epithelial and stromal tumor family was introduced as a new entity. This family encompasses a spectrum of tumors, ranging from predominantly cystic tumors (adult cystic nephromas) to tumors that are variably solid (mixed epithelial and stromal tumors). The majority of previous studies incorporating "mixed epithelial and stromal tumor" in the titles were actually reports of imaging findings of adult cystic nephroma. Thus, the solid component of mixed epithelial and stromal tumors has not been well evaluated. In this study, we present 2 cases of mixed epithelial and stromal tumors, as defined by the 2016 World Health Organization classification, showing a predominantly solid component. The characteristic findings of the solid component of these tumors were T2-hypointensity on magnetic resonance imaging and hyperattenuation on unenhanced computed tomography. Angiomyolipoma with epithelial cysts and epithelioid angiomyolipoma should be considered in the differential diagnosis of mixed epithelial and stromal tumors.Fourty-seven-year-old woman with 5-year history of progressive decreased left eye vision. Optical coherence tomography showed optic nerve atrophy (left > right) and brain MRI revealed T2 hyperintense signal along the course of left optic radiations. We present a case of a trans-synaptic degeneration of the optic radiation in a patient with confirmed optic atrophy. SNDX-5613 purchase Trans-synaptic degeneration of the optic radiation without associated infarct or inflammatory disease has not been reported before in patients with optic atrophy.The term amyloidosis describes a group of diseases caused by the fibrillar deposit of poorly folded proteins in tissues with a secondary alteration of their function. Diffuse parenchymal lung disease associated with amyloidosis is rare and is most often diagnosed in autopsy. A 45-year-old male patient presented an acute episode of cough with mucoid expectoration. He had also dyspnea, dry cough, chest pain, and constitutional symptoms of 6 months of evolution. Initially the case was treated as acute pneumonia. After taking radiological images of the thorax, a diagnostic suspicion of lymphangitic spread of neoplasia was assumed. Histopathological findings of an open pulmonary biopsy demonstrated interstitial thickening with perivascular eosinophilic invasion. Congo Red staining and immunohistochemistry studies were done and turned out to be positive for amyloid. The perilymphatic micronodular pattern as a radiological manifestation of parenchymal pulmonary amyloidosis has been very rarely described in the literature, therefore it must be considered as a differential diagnosis in patients with this pattern in CT scan and should be an incentive for its histopathological study once a neoplasm is ruled out.