Extraperitoneal mass effect by ascites under tension

Benign ascites may cause an extraperitoneal mass effect when it becomes loculated by adhesions or when peritoneal recesses are enlarged by ascites under tension. Five symptomatic patients were examined by computed tomography demonstrating ascites as the cause of an apparent mediastinal mass in 1, a retrogastric mass in 1, and a retroperitoneal mass displacing the right kidney anteriorly in 4.     

Dermoid cyst: a rare tumour of the appendix.

Dermoid cyst is a rare but well recognised cause of a mass in the abdomen. As a cause of a palpable mass in the right iliac fossa, dermoid and epidermoid cysts of the caecum have hitherto been described. We here report a case of a dermoid cyst arising from the vermiform appendix.     

宏基因组学测序诊断曼氏裂头蚴病1例

患者于2000年无明显诱因发现下腹部游走性包块,20年来多次就诊,未明确病因。2020年8月11日发现包块游走于左侧腋前,微创手术取出不完整白色虫体3段,用宏基因组学测序鉴定虫体,明确诊断为曼氏裂头蚴病。2021年10月21日经手术取出完整虫体,患者康复出院;随访患者身体状况良好,全身未发现新包块。     

Azygos vein aneurysm forming a mediastinal mass

Aneurysm of the azygos vein is a rare cause of mediastinal mass that is normally detected radiologically in asymptomatic patients. In some cases a diagnosis is made by noninvasive methods, such as computed tomography and magnetic resonance. However, in the present case imaging revealed what appeared to be a solid mass. When the mass had been excised by thoracotomy, the histopathologic diagnosis was aneurysm of the azygos vein.     

Spontaneous massive hemothorax secondary to chest wall chondrosarcoma: a case report

We present the case of a 30-year-old man with no past history of disease or recent trauma, who was seen in the emergency room after developing sharp pain in the left hemithorax. Chest roentgenogram showed costopherenic angle blunting and an oval mass in the left mediastinum. A computed tomographic scan showed extrapleural mass with coarse calcifications and pleural effusion, confirmed by magnetic resonance imaging. The tumor was biopsied and removed during thoracotomy. The pathology reported revealed chondrosarcoma, which is a rare cause for a spontaneous massive hemothorax. Invasion of the intercostals vessels by the tumor was the probable cause of hemothorax in this patient.     

Hypertension artérielle associée à une paraparésie des membres inférieurs révélant un adénome surrénalien

Cushing's syndrome is a rare cause of high blood pressure. The originally adrenal cause is found in 15% of cases. We describe the case of a patient with hypertension associated with paraparesis of the lower limbs revealing a Cushing syndrome due to a left adrenal adenoma. A 23-year-old man consults for a paraparesis of the lower limbs. The highlighting of an arterial high blood pressure led to the realization of complementary examinations. Computed tomography of the abdomen shows a left adrenal mass. Chirurgical excision of the mass was performed and histological examination concluded with adrenal adenoma. After intervention, the patient normalized his blood pressure with 3 years of follow up. This case illustrates a form of endocrine hypertension of adrenal origin and the need for a careful clinical examination during the discovery of hypertension in the young subject in order to carry out adequate balance sheets to search for a curable cause of secondary hypertension.     

Gastric outlet obstruction caused by Riedel's lobe of the liver: a diagnostic and therapeutic challenge for surgeons

Gastric outlet obstruction is commonly caused by gastric ulcers, pyloric stenosis, foreign bodies, and compression of the duodenum by pancreatic cancer and other intra-abdominal masses. There is no report on Riedel's lobe of the liver as a cause of this condition. This is the first report to describe Riedel's lobe of the liver as a cause of gastric outlet obstruction. An 81-year-old woman who complained of severe nausea and abdominal discomfort was admitted to our clinic. The physical examination revealed a mass in the right upper quadrant of the abdomen. An exploratory laparotomy showed an approximately 10x6-cm tongue-like mass arising from the left lobe of the liver, extending to the umbilicus and compressing the prepyloric area of the stomach. The nature and location of the mass were compatible with Riedel's lobe. A cholecystectomy was performed and the compressing mass was fixed to the abdominal wall with a simple suture. The patient did well postoperatively and was discharged from the hospital. We also reviewed the English-language literature to provide an update on this subject.     

Obscure anaemia and hepatic dysfunction in Castleman's disease.

A case is reported illustrating a rare and puzzling cause of long standing anaemia and abnormal liver function tests. The diagnosis of Castleman's disease came to light only after an adrenal mass was noted during ultrasound examination. Removal of the mass led to a rapid reversal of all the abnormalities.     

鞍区占位病因诊断的误区

垂体鞍区占位的病因诊断与处理及预后密切相关.鞍区占位病因多样,易误诊误治.本文介绍了临床较常见易混淆的一组鞍区占位病因的特点,鉴别要点,诊断注意点.旨在提醒广大内分泌医师在鞍区占位病因诊断上需谨慎对待,提高鉴别水平,避免误诊误治.     

Single-molecule mass spectrometry in solution using a solitary nanopore

We introduce a two-dimensional method for mass spectrometry in solution that is based on the interaction between a nanometer-scale pore and analytes. As an example, poly(ethylene glycol) molecules that enter a single alpha-hemolysin pore cause distinct mass-dependent conductance states with characteristic mean residence times. The conductance-based mass spectrum clearly resolves the repeat unit of ethylene glycol, and the mean residence time increases monotonically with the poly(ethylene glycol) mass. This technique could prove useful for the real-time characterization of molecules in solution.     

Lymphomatoid granulomatosis: A rare cause of cavitatory lung disease in an HIV positive child

We present an unusual cause of lung cavitation and a neck mass in an HIV positive child, initially thought to be tuberculosis. This case report illustrates that the cause for cavitatory lung disease in immunosuppressed children has a large number of possibilities and careful investigation to determine the etiological agent is warranted. Pediatr Pulmonol. 2013; 48:202–205. © 2012 Wiley Periodicals, Inc.     

FEMORAL BONE MASS IN PATIENTS WITH RHEUMATOID ARTHRITIS AND OSTEOARTHROSIS

Femoral bone mass has been measured in 42 patients with rheumatoidarthritis and in 27 with osteoarthrosis. Measurements were madeby scanning the leg with a photon beam from ²⁴¹Am. The resultshave been compared with normal subjects and correlated withclinical, biochemical and radiological parameters of the arthriticpatients. In general, femoral bone mass was lower than normalin patients with arthritic changes. Reduced physical activityrather than the arthritis itself seemed to be the cause of thelow bone mass. In rheumatoid arthritis the bone mass appearedto be an accurate representation of the clinical assessmentof the disease.     

Complementary use of computerized tomography and technetium scanning in the diagnosis of accessory spleen

Summary A patient with a previous splenectomy presented with acute gastrointestinal bleeding. He was found to have a benign gastric ulcer, esophagogastric varices, and a mass indenting the gastric fundus. Abdominal computerized tomography and technetium liver-spleen scanning established the diagnosis of an accessory spleen as cause for the mass effect. This diagnostic approach obviated the need for arteriography and exploratory laparotomy.     

Cardiogenic embolisms following silent anterior wall infarct

A 33-year-old man had suffered recurrent arterial embolisms. Echocardiography identified as the most likely cause a large mobile mass in the left ventricle. Initially a primary heart tumor was discussed, but the ECG finding of an anterolateral scar and an angiographically proven LAD-stenosis were suspicious of an organized thrombus of the left ventricle. After surgical excision, histological analysis classified the mass as an organized thrombus.     

An uncommon cause of a vascular mass in the left lung in neonate: a case report with a brief review of literature

A 20-day-old female child presented with mild respiratory distress since first week of life. On examination there was an ejection systolic murmur at left sternal border. Chest x-ray revealed well-defined mass in the left lung. Echocardiogram showed features suggestive tetrology of fallot with absent pulmonary valve with massively dilated main and left pulmonary artery. We report a rare cause of vascular mass in a neonate due to tetrology fallot with absent pulmonary valve.     

Adenoid cystic carcinoma of trachea

Adenoid cystic carcinoma of trachea is a rare but distinct salivary gland-type malignant neoplasm. This paper described such a case in a young female in whom the mass that progressed to cause almost complete obstruction before it was diagnosed.     

Pedunculated Aortic Mural Thrombus Attached at Unusual Site of Normal Aorta Presenting With Acute Myocardial Infarction

We report a rare case of thrombus formation in normal aorta causing myocardial infarction. A 44-year-old man who had no prothrombotic risk factors presented with acute myocardial infarction. Two-dimensional echocardiography revealed a hypoechoic homogenous mass occupying the left coronary sinus and attached at the nonatherosclerotic aorta. The mass seemed to cause myocardial infarction by occluding the left anterior descending artery with oscillating movement according to the cardiac cycles. After surgical resection, the histopathologic examination revealed the mass as an organized thrombus. This case implies that an aortic mural thrombus can form in a nonatherosclerotic aorta without any prothrombotic risk factors.     

Metabolic adaptation to malnutrition

Resting and nonresting energy expenditure are reduced in restricted volunteers.This decrease is due to fat-free mass depletion and also to a reduction in energy expenditure per kilogram of fat-free mass. Protein deprivation leads to a reduction in protein turn-over or oxidation in the postabsorptive state and to a decrease in the amplitude of diurnal cycling of protein turn-over, synthesis and breakdown. Such a metabolic adaptation tends to maintain fat mass and to reduce the need for essential amino acids. In adults with naturally occurring states of malnutrition, the results vary according to the cause of malnutrition. One may observe or not a reduction in energy expenditure or protein metabolism. The lack of reduction of metabolic adaptation could be due to the long term energy and protein deprivation and to the preservation of visceral mass relative to muscle mass     

The evanescent right atrial mass

An unusual cause of pulmonary emboli from an evanescent right atrial mass is described in this case report. The systematic approach from initial presentation to a definite diagnosis of a rare condition is described.