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Wang Q, Long ZB, Qian M, Feng J, Guo XX, Yang AM, You Y, Fei GJ. [The 486th case: chronic diarrhea and orthostatic hypotension]. Zhonghua Nei Ke Za Zhi 2021; 60:284-288. [PMID: 33663184 DOI: 10.3760/cma.j.cn112138-20200318-00260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
A 57-year-old man was admitted to hospital with diarrhea for 10 months and dizziness for 4 months. The patient had 1-2 liters watery stool per day, without pyogenic blood or abnormality in gastroenteroscopy examination. The level of hemoglobin and albumin was generally normal, and fasting test was positive. At the same time, he was accompanied with hyperalgesia of lower limbs and orthostatic hypotension. After the discussion of multiple disciplinary teams, the patient was diagnosed with amyloidosis by sural nerve biopsy, myocardial MRI, and the assays of urine immunoelectrophoresis and serum free light chain. Light chain amyloidosis was confirmed after excluded the diagnosis of familial amyloidosis. The patient was improved after courses of chemotherapy with melphalan and dexamethasone.
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Affiliation(s)
- Q Wang
- Department of Gastroenterology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Z B Long
- Department of Hematology, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
| | - M Qian
- Department of Neurology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - J Feng
- Department of Hematology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - X X Guo
- Department of Cardiology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - A M Yang
- Department of Gastroenterology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Y You
- Department of Pathology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - G J Fei
- Department of Gastroenterology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
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Zhang ZY, Li XY, Bai CM, Zhou Y, Wu X, Yang AM, Hua SR. [The clinicopathologic features and prognostic analysis of pancreatic metastasis from clear cell renal cell carcinoma]. Zhonghua Zhong Liu Za Zhi 2020; 42:44-49. [PMID: 32023768 DOI: 10.3760/cma.j.issn.0253-3766.2020.01.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the clinicopathologic features and prognosis of the patients who had clear cell renal cell carcinoma (CCRCC) with metastasis to the pancreas. Methods: From Jan, 2000 to Dec, 2018, 18 patients with clear cell renal cell carcinoma (CCRCC) and had pathologically diagnosed metastasis to the pancreas were enrolled at Peking Union Medical College Hospital. The clinical and pathological data were retrospectively analyzed. Results: 11 out of 18 patients were male, and the other 7 were female. The average age of onset of CCRCC was 51.4 years. 8 cases (44.4%) occurred in the left kidney, and the other 10 cases (55.6%) with right kidney tumor. Three patients had synchronous pancreatic metastasis, and the other 15 patients had metachronous pancreatic metastasis. The median time from CCRCC onset to pancreas metastasis was 156 months. The main complaints of pancreas metastasis were abdominal pain, jaundice, gastrointestinal bleeding, nausea, weakness, loss of weight and so on. Seven patients (38.9%) had single lesion of pancreas, while 11 patients (66.1%) had multiple lesions of pancreas. Nine patients (50%) had other organs metastasis besides pancreatic metastasis at the same time. Five patients underwent pancreatic metastasis resection, while 15 patients received oral tyrosine kinase inhibitor(TKI). The mean follow-up was 171.7 months(1~361.5 months) and 5 patients died. The median overall survival (mOS) was 122 months, and the 5 year-survival rate was 81.4%. In univariate analysis, synchronous metastasis to the pancreas, relapse after 10 years, Memorial Sloan Kettering Cancer Center prognostic index, International Metastatic Renal Cell Carcinoma Database Consortium index were all significant parameters for patients'survival. Conclusions: Metastasis to the pancreas from clear cell renal cell carcinoma were rare. These patients had better survival outcomes, especially those relapsing after ten years. Pancreatic metastasis resection had no significant benefit on patient's survival.
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Affiliation(s)
- Z Y Zhang
- Department of Oncology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Peking Union Medical College, Beijing 100730, China
| | - X Y Li
- Department of Oncology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Peking Union Medical College, Beijing 100730, China
| | - C M Bai
- Department of Oncology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Peking Union Medical College, Beijing 100730, China
| | - Y Zhou
- Department of Urology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Peking Union Medical College, Beijing 100730, China
| | - X Wu
- Department of Gastroenterology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Peking Union Medical College, Beijing 100730, China
| | - A M Yang
- Department of Gastroenterology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Peking Union Medical College, Beijing 100730, China
| | - S R Hua
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Peking Union Medical College, Beijing 100730, China
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Wang YN, Li XQ, Guo F, Yang AM, Qian JM, Li JN, Xue HD, Zhou WX, Ma ZQ. [The 465th case: intestinal obstruction, gastrointestinal hemorrhage and duodenal fistula]. Zhonghua Nei Ke Za Zhi 2018; 57:614-616. [PMID: 30060340 DOI: 10.3760/cma.j.issn.0578-1426.2018.08.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
This is a complicated and difficult case. The onset symptom of a 62-year-old male was recurrent intestinal obstruction. Ileocecal and ileocolic operation was done twice. Massive gastrointestinal bleeding occurred due to giant fistula of descending duodenum, which connected to ileocolic anastomosis. After consultation by multidisciplinary team, jejunal-feeding tube was placed to provide enteral nutrition. With general condition improving, duodenal fistula repair and involved bowel resection were performed. Postoperative pathology confirmed Crohn's disease. The patient was treated with thalidomide and recovered well during follow-up.
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Affiliation(s)
| | - X Q Li
- Department of Gastroenterology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
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Zhang SY, Li J, Wang Q, Feng YL, Jiang QW, Jiang F, Fei GJ, Yao F, Zhu LM, Qian JM, Yang AM. [The colonoscopic characteristics of colorectal endometriosis: a single-centered retrospective study]. Zhonghua Nei Ke Za Zhi 2018; 57:275-278. [PMID: 29614586 DOI: 10.3760/cma.j.issn.0578-1426.2018.04.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To reinforce the awareness of colorectal endometriosis (EM) in colonoscopy examination. Methods: Patients diagnosed as colorectal EM at Peking Union Medical College Hospital between February 2002 and February 2017 were enrolled in this study. The clinical characteristics and endoscopic features of EM lesions were summarized and compared between pathologically positive group and negative group. Results: A total of 34 cases were included with average age of (38.3±8.9) years old. All EM lesions located within rectum and sigmoid colon. The endoscopic lesions manifested as protrusion in 21 cases (61.8%) and protrusion-depression in 13 cases (38.2%), local stenosis in 8 cases (23.5%); erosive surface in 33 cases (97.1%) with local spontaneous hemorrhage in 4 cases (11.8%); nodal surface in 23 cases (67.6%), and lymphangiectasis base in 9 cases (26.4%). Endoscopic biopsy specimens were obtained in all cases with average 3 (2, 4) pieces. Positive results were found only in 4 patients (11.8%) with 3 endometriosis and one (endometrial) adenosarcoma. Compared with negative group, spontaneous hemorrhage was more frequent in positive group (2/4 vs. 2/30, P=0.013). Mean biopsy sample number was significantly larger in positive group (5 vs. 3, P=0.004). Conclusions: Colorectal endometriosis is mostly located within rectosigmoid region. Endoscopic features mainly include protrusion or protrusion-depression lesions with erosive and nodular surface, or local stenosis. Spontaneous hemorrhage under colonoscopy yields higher positive rate for biopsy, thus increasing biopsy sample numbers may improve pathology results.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - A M Yang
- Department of Gastroenterology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medicine Sciences, Beijing 100730, China
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Jiang QW, Wang FD, Wang WZ, Wu X, Shu HJ, Li JN, Yang AM, Qian JM, Wu D. [An analysis of clinical characteristics of twelve cases of mesenteric panniculitis]. Zhonghua Nei Ke Za Zhi 2017; 56:112-115. [PMID: 28162180 DOI: 10.3760/cma.j.issn.0578-1426.2017.02.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: Mesenteric panniculitis is an idiopathic, uncommon disease involving the adipose tissue of mesentery. The etiology, diagnosis and treatment are still unnoticed. We thus reported a case series to improve the understanding of this rare disorder. Methods: We retrospectively analyzed the clinical data of 12 patients with mesenteric panniculitis including manifestation, diagnosis, treatment and prognosis. Results: We found a male predominance (M∶F 3∶1) with the median age of 58 years old at diagnosis. The most common symptom was abdominal pain (9/12), followed by abdominal distension (3/12) and weight loss (3/12). Physical examination was unremarkable in the majority of patients (8/12). C reactive protein (9/12) and erythrocyte sedimentation rate (10/12) were normal in majority of patients. CT findings were of much diagnostic value. All patients had small intestinal mesentery involvement and multi-nodular appearance with increased fat density. Pseudo-capsule sign (8/12) and fat halo sign (6/12) were common. Pathological diagnosis was obtained in 4 cases showing fat tissue inflammation with local necrosis and fibrosis. Six cases all received prednisone, 2 with combined cyclophosphamide, 1 with azathioprine, 1 with tripterygium wilfordii. Short-term clinical response was achieved in all cases, but two patients relapsed. Conclusions: Mesenteric panniculitis occurs predominantly in middle-aged and elderly. Abdominal pain is the leading symptom. Inflammatory markers are often normal while computed tomography is the most important diagnostic tool. Surgery combined with cortical steroid and immunosuppressant agents is effective.
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Affiliation(s)
| | | | | | | | | | | | | | | | - D Wu
- Department of Gastroenterology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
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Feng YL, Wu D, Zhang SY, Wu X, Shu HJ, Yang AM, Qian JM. [A retrospective case-control study of immunoglobulin G 4-related disease combined with malignancy]. Zhonghua Nei Ke Za Zhi 2016; 55:869-871. [PMID: 27801343 DOI: 10.3760/cma.j.issn.0578-1426.2016.11.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
IgG4-related disease (IgG4-RD) has been proved to be associated with malignancy.The incidence and risk factors of malignancy development in IgG4-RD were not clear. Nine IgG4-RD patients with malignancies and 27 IgG4-RD control cases were analyzed for risk factors and clinical features. The incidence of malignancy in IgG4-RD was 3.3%, higher than age-controlled general population. Smoking history was significantly more common in patients with malignancies than in the control group (9/9 vs 16/27, P<0.05). A total of 6/9 malignancies occurred within the first year after the diagnosis of IgG4-RD. Colorectal, biliary and thyroid cancers were the leading types. Smoking history is a risk factor for IgG4-RD associated malignancy. Careful vigilance to monitor malignancy needs to be paid during follow-up.
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Affiliation(s)
- Y L Feng
- Department of Gastroenterology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
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Geng W, Qiao XB, Ji KY, Wang HF, Yang AM. [An analysis of clinical features of celiac disease patients in different ethnic]. Zhonghua Nei Ke Za Zhi 2016; 55:613-8. [PMID: 27480555 DOI: 10.3760/cma.j.issn.0578-1426.2016.08.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To summarize the clinical features of different racial patients with celiac disease (CD) and analyze the disease prevalence, diagnosis and treatment in Chinese population. METHODS All the patients were diagnosed as CD and enrolled in Beijing United Family Hospital between January 2005 and July 2015.Clinical data including nationality, age, symptoms, endoscopic and pathological findings, outcome were collected and compared in patients from different countries. RESULTS A total of 87 patients were enrolled including 63 Caucasians, 18 Asian patients and 6 Middle East patients.The peak age of disease onset was 40-60 years old.Patients with typical symptoms such as chronic diarrhea and weight loss only accounted for 20.7%(18/87) and 9.2%(8/87) respectively.Some patients presented with nonspecific symptoms such as abdominal pain and bloating [32.2%(28/87)], even constipation [5.7%(5/87)].13.8%(12/87) patients were previously diagnosed as irritable bowel syndrome.The incidence of abdominal pain, bloating, diarrhea and constipation between Asians and Caucasians had no statistical significance (P>0.05); but the proportions of weight loss, growth retardation, iron deficiency anemia and dermatitis herpetiformis in Asian group were significantly higher than that in Caucasian group (P<0.05). IgA type of anti-gliadin antibody (AGA), endomysium antibody (EMA) and tissue transglutaminase antibody (tTGA) were dominant autoimmune antibodies in patients with CD, which accounted for 58.6%(51/87), 44.8%(39/87) and 36.8%(32/87) respectively.The endoscopy showed that the lesion of CD was mainly located in small intestine, with reducing severity from the proximal to the distal small intestine.The lesions of duodenal bulb and descending duodenum appeared more significant in Asian group.Accordingly pathological intestinal atrophy and the degree of intraepithelial lymphocytosis were more severe in Asian patients.All 87 cases took the gluten-free diet (GFD). Eighty-one cases received serological follow up and 8 with endoscopic intestinal biopsy.The celiac disease antibodies in 47 patients turned negative from 6-9 months after GFD treatment, while 34 patients turned negative from 12-18 months after GFD.All patients reported disease remission to some extent.After 1 year GFD treatment, the pathology of endoscopic intestinal biopsy in 8 patients showed significant improvement of villous atrophy and lymphocyte infiltration. CONCLUSIONS CD patients with typical clinical manifestations are not the majority.Serological celiac disease antibodies (AGA, EMA and tTGA) have a high diagnostic value.GFD treatment is effective on majority of celiac patients.Clinical manifestations, endoscopy, intestinal pathology, and response to GFD in Chinese patients are not the same as Caucasians.Clinicians need to pay attention to the differential diagnosis.
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Affiliation(s)
| | | | | | | | - A M Yang
- Department of Gastroenterology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
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Yang AM, Sheng YH, Farid MA, Zhang H, Lin XH, Li GB, Liu LJ, Liao FH, Lin JH. Copper doped EuMnO3: synthesis, structure and magnetic properties. RSC Adv 2016. [DOI: 10.1039/c5ra27426e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Solid solution EuMn1−xCuxO3−δ (0 ≤ x ≤ 0.316) crystallizes in the space group Pnma and shows magnetic transitions from about 52 to 20 K.
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Affiliation(s)
- A. M. Yang
- College of Materials Science and Engineering
- Guilin University of Technology
- Guilin 541004
- China
| | - Y. H. Sheng
- The Second High School Attached to Beijing Normal University
- China
| | - M. A. Farid
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
| | - H. Zhang
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
| | - X. H. Lin
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
| | - G. B. Li
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
| | - L. J. Liu
- College of Materials Science and Engineering
- Guilin University of Technology
- Guilin 541004
- China
| | - F. H. Liao
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
| | - J. H. Lin
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
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Chu QJ, Yang AM, Jia Z, Xie GL, Zhang W. A new Visual Stylet (Discopo): early clinical experience in patients with difficult intubation. Anaesth Intensive Care 2011; 39:512-513. [PMID: 21675084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
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Abstract
In the primary prevention of variceal hemorrhage, beta-blockers continue to be the first-line treatment. Newer nonselective beta-blockers with anti-alpha1-adrenergic activity, such as carvedilol, appear to have a better impact on reducing the hepatic venous pressure gradient than propranolol. The addition of isosorbide mononitrate appears to improve the effectiveness of beta-blockers in primary prophylaxis, but not that of somatostatin in the treatment of acute variceal hemorrhage. The use of vasoactive drugs alone in acute variceal bleeding has not proved to be more effective than endoscopic treatment. The advent of endoscopic variceal ligation (EVL) has strengthened the role of endoscopy in the management of bleeding esophageal varices. EVL has improved the results, particularly in terms of lowering the treatment-related morbidity, compared with endoscopic variceal sclerotherapy (EVS). However, the variceal recurrence rate after initial eradication with EVL is relatively high. In contrast to synchronous combined therapy with EVL plus EVS, metachronous combination of EVL and low-dose EVS may improve the results of EVL alone. For bleeding fundic varices, obliteration using cyanoacrylate is currently the treatment of choice. Endosonography (EUS) is coming into more widespread use in the assessment of variceal eradication and in further attempts to improve the results of endoscopic injection therapy. According to two meta-analysis studies, transjugular intrahepatic portosystemic shunt (TIPS) is not yet capable of replacing endoscopic treatment in the secondary prevention of variceal bleeding.
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Affiliation(s)
- S Seewald
- Dept. of Interdisciplinary Endoscopy, University Hospital, Eppendorf, Hamburg, Germany
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Moore KD, Barrack RL, Sychterz CJ, Sawhney J, Yang AM, Engh CA. The Effect of Weight-Bearing on the Radiographic Measurement of the Position of the Femoral Head After Total Hip Arthroplasty*. J Bone Joint Surg Am 2000. [PMID: 10653085 DOI: 10.2106/00004623-200001000-00008] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Affiliation(s)
- K D Moore
- Anderson Orthopaedic Research Institute, Alexandria, Virginia 22307, USA
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Abstract
Because polyethylene wear adversely affects the outcome of total hip arthroplasty, reliable techniques for in vivo radiographic evaluation of femoral head penetration into the polyethylene liner are needed. With the recent development of software to measure three-dimensional femoral head penetration, the adequacy of two-dimensional head penetration measurements to estimate a three-dimensional process has been questioned. Thus, the purpose of the current study was to compare directly two-dimensional and three-dimensional radiographic measurements of femoral head penetration. Using two computer assisted radiographic techniques, the authors of this study measured the two-dimensional and the three-dimensional penetration of the femoral head into the polyethylene liner in 202 hips implanted with porous coated acetabular components. A comparison of two-dimensional and three-dimensional measurements showed that, on average, the mean amount of three-dimensional head penetration was larger than the mean amount of two-dimensional head penetration. However, linear regression analysis showed that the two measurements were highly correlated (r2 = 0.87, slope = 0.99, intercept = 0.08 mm). For most patients (95%), two-dimensional and three-dimensional measurements of femoral head penetration were nearly equal. However, there was a small subset of patients (5%) for whom three-dimensional radiographic penetration measurements were three times greater than corresponding two-dimensional radiographic penetration measurements. No common risk factor among this small subset of patients was identified. The current study provides practical information for the orthopaedic surgeon trying to assess polyethylene wear in hip replacement cases. It shows that for most patients head penetration can be measured sufficiently from anteroposterior radiographs alone. However, in a small percentage of patients (5% in the current study) the femoral head also moves perpendicular to the plane of the anteroposterior radiograph. For these cases, accurate analysis of head penetration requires three-dimensional analysis using anteroposterior and lateral radiographs.
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Affiliation(s)
- C J Sychterz
- Anderson Orthopaedic Research Institute, Alexandria, VA 22306, USA
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Zhu TD, Xu JH, Yang AM. [Roentgenological and pathological findings in 22 cases of secondary fungus ball of pulmonary aspergillosis]. Zhonghua Jie He He Hu Xi Za Zhi 1994; 17:88-9, 126. [PMID: 7994774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Twenty-two cases of secondary fungus ball of pulmonary aspergillosis defined by operation were reported. All cases were referred with incorrectly diagnosis to the authors and only 45.3% were correctly diagnosed before operation. The roentgenological and pathological findings were studied. The results show that not familiar with non-typical appearance is the most common cause for incorrect diagnosis.
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