bluuebunny/crossref_metadata_2025_split huggingface dataset:
Ventricular myocardial thicknesses in anencephalic fetuses
Authors: Kurtoglu Z. , Uluutku M.H. , Yeginoglu G. , Ozturk H. , Camdeviren H. 
Published: August 2004

AbstractThe heart of an anencephalic baby can be used as a donor after death. There exists insufficient information in literature, however, for the possible morphological differences in anencephalic hearts. This study compares ventricular myocardial thicknesses of anencephalic fetuses with normal fetuses in the same gestational age group. The comparison was made histologically on the slices taken from three levels of anterior and posterior walls of the left and right ventricles and from two levels of the interventricular septum. When each level was taken into account separately, the middle part of the left ventricular anterior wall was detected thinner in anencephalics (P = 0.010). When the mean value for each wall (anterior and posterior) was taken into account, left ventricular anterior wall was found thinner in anencephalics (P = 0.005). When the mean value for each ventricle was compared, the left ventricular wall was detected thinner in anencephalics (P = 0.025). These results support the idea that absence of the cerebral cortex results in modifications of the fetal heart. Because differences were limited to the left ventricular anterior wall non‐homogenously, factors other than the decrease in the heart load (e.g., changes in intrathoracic anatomy) might also affect the myocardial features. When the mean value of right ventricle was compared to the left within the normal and anencephalic groups separately, the left ventricle was thicker than the right in normal fetuses (P = 0.016). In anencephalics the difference between two ventricular walls was insignificant (P = 0.084). This supports the left ventricular dominance in normal fetuses but not in anencephalics for the 27–34 weeks of age group. We suggest that when an anencephalic heart is intended to use as a donor, possible alterations presented in this article should be taken into account. Clin. Anat. 17:492–496, 2004. © 2004 Wiley‐Liss, Inc.
Evaluation of the ankle syndesmosis: A plastination slices study
Authors: Sora Mircea‐Constantin , Strobl Birgit , Staykov Dimitre , Förster‐Streffleur Sophie 
Published: August 2004

AbstractPlastination is an excellent tool for studying different anatomical and clinical questions. This technique is unique because it offers the possibility to produce transparent slices series that can be easily processed morphometrically. It is very difficult to recognize the subtle widening of the tibiofibular syndesmosis in less severe injuries of this articulation. Proper anatomic knowledge of the syndesmosis might be helpful. The ankle syndesmosis was investigated on 20 cadaver feet by using the E12 plastination technique. Each foot was cut into 1.6‐mm transverse slices and then plastinated. The following parameters (reflecting the position of the fibula in the distal tibiofibular syndesmosis) were measured: the length (LFI) and the depth of the fibular incisure (DFI); the width of the clear space (TCS) and the tibiofibular overlap (TFO); the position of the fibula regarding the anterior aspect of the tibia (A); and the width of the fibula (W). Due to the unique approach of this method, values for the position of the fibular incisure with respect to the frontal (F) and sagittal (S) plane were described for the entire syndesmosis. The prevalence of syndesmotic injury in association with sprains of the ankle is up to 11%. The data presented in the study are useful for the appreciation of the correct position of the fibula in the fibular incisure and can be correlated with standard anterior–posterior radiographies and CT examinations of the ankle joint. Clin. Anat. 17:513–517, 2004. © 2004 Wiley‐Liss, Inc.
Selective Estrogen‐Receptor Modulators (SERMs) in the Cyclopentadienylrhenium Tricarbonyl Series: Synthesis and Biological Behaviour
Authors: Top Siden , Vessières Anne , Pigeon Pascal , Rager Marie‐Noëlle , Huché Michel , Salomon Emmanuel , Cabestaing Claude , Vaissermann Jacqueline , Jaouen Gérard 
Published: August 2004

AbstractA series of organometallic antiestrogens based on the OH‐tamoxifen (OH‐Tam) skeleton and bearing the (η5‐C5H4)ReI(CO)3 unit has been prepared by using McMurry coupling for the purpose of studying their biological behaviour. The cyclopentadienylrhenium tricarbonyl moiety is indeed stable in biological media, compact, lipophilic and easy to handle. Furthermore, this study allowed us to select the best candidates for subsequent use as radiopharmaceuticals either for imaging or therapy by using appropriate radionucleides, namely 99mTc and 188Re. In these molecules the β‐phenyl group of OH‐Tam has been replaced by the (η5‐C5H4)Re(CO)3 moiety, and the length of the dimethylamino side chain O(CH2)nN(CH3)2 was varied (n=2, 3, 4, 5 and 8). The compounds 7 a–7 e were obtained as mixtures of their Z and E isomers, which could be separated by semipreparative HPLC. Unlike their ferrocene homologues, the compounds do not isomerise in solution. Structural identification was carried out with NMR spectroscopy by using the HMBC and NOE techniques and was confirmed by the X‐ray structural determination of (E)‐7 a (n=2). These molecules were more lipophilic than OH‐Tam (log Po/w=4.5–6.3) and they were all reasonably well recognized by the two forms of the estrogen receptor (ERα and ERβ). For example, (Z)‐7 b (n=3) has high relative binding affinity (RBA) values of 31 % for ERα and 16.8 % for ERβ. The antiproliferative effects of two pairs of isomers, (Z)‐ and (E)‐7 b (n=3) and (Z)‐ and (E)‐7 d (n=5), were studied at a molarity of 1 μM on two breast‐cancer cell lines, MCF7 (ERα positive) and MDA‐MB231 (ERα negative). These molecules had an antiproliferative effect on MCF7 cells slightly higher than that of OH‐Tam and no effect on MDA‐MB231 cells. Thus, the antiproliferative effect observed on the MCF7 cells seemed essentially to be linked to an antiestrogenic effect. Molecular modelling studies have allowed us to rationalise these effects and select the best compounds for future development of a radioactive series.
Fluid Dynamics of Spouted Bed Apparatus with Two Fluid Inlets: An Experimental Study
Authors: Piskova E. , Mörl L. , Mitev D. , Krüger G. 
Published: August 2004

AbstractSpouted bed apparatuses are already used in some technical areas for a variety of chemical and metallurgical operations. One of the advantages of spouted beds compared to the fluidized beds is the possibility of achieving better conditions for an intense heat and mass transfer. Spouted beds are characterized by a relatively simple construction and an easy design, which allows the scale‐up of the spouted bed apparatuses and the creation of industrial equipments.
Engineering an Anti‐Graffiti System: A Study in Industrial Product Design
Authors: Hutchinson A.J. , Gomes V.G. , Hyde L.J. 
Published: August 2004

AbstractThe objective of this work was to develop products for the anti‐graffiti market using a product design framework that takes into account the company core practices and meets customer expectations. Product development comprised several concurrent steps including market research and analysis to determine the market potential using a Quality Functional Deployment tool. From market research it was estimated that anti‐graffiti products had significant potential within Australia. A range of technical and quality parameters were tested. The Hildebrand and Hansen solubility parameters, viscosity and diffusivity estimates were mainly used for technical evaluation of products. An iterative process was used throughout in conjunction with parameter restraints to meet environmental sustainability, waste reduction and minimize resource consumption. The result was a cost effective product, tailored to customer expectations.
Hollow Microsperes
Authors: Bertling J. , Blömer J. , Kümmel R. 
Published: August 2004

AbstractHollow microspheres are spherically symmetrical particles consisting of at least two phases. Their sales are continuously increasing because of a large number of well‐known and new applications. While most of the current needs for hollow microspheres are met by inorganic byproducts of combustion processes (cenospheres), the fabrication of tailor‐made hollow sphere structures by processes like spray‐drying as well as dripping, emulsion and suspension techniques is gaining more and more interest. Surface phenomena play an important role as far as formation, properties and stability of hollow microspheres are concerned. Template techniques can be used to yield structures that have not been available so far. Modeling and simulation of the formation processes are useful tools to understand the formation mechanisms and to simplify the scaleup.
Enantioselective Self‐Assembly of Bimetallic [MnII (Δ)‐CrIII(C2O4)3]− and [MnII (Λ)‐CrIII(C2O4)3]− Layered Anionic Networks Templated by the Optically Active (Rp)‐ and (Sp)‐[1‐CH2N(n‐C3H7)3‐2‐CH3C5H3FeC5H5]+ Ions
Authors: Gruselle Michel , Thouvenot René , Malézieux Bernard , Train Cyrille , Gredin Patrick , Demeschik Tatiana V. , Troitskaya Ludmila L. , Sokolov Viatcheslav I. 
Published: August 2004

AbstractThe ferrocenic ammonium (Rp)‐ and (Sp)‐[1‐CH2NR3‐‐2‐CH3C5H3FeC5H5] iodide salts with R=CH3, C2H5, n‐C3H7, n‐C4H9, were synthesized starting from the (Rp)‐ and (Sp)‐[1‐CH2N(CH3)2‐2‐CH3C5H3FeC5H5] amines obtained in their optically active forms through asymmetric cyclopalladation of [C5H5FeC5H4CH2N(CH3)2]. 1H NMR studies of these planar chiral 1,2‐disubstituted ferrocenic ammonium iodide salts in the presence of the (Δ)‐(tris(tetrachlorobenzenediolato)phosphate(V) anion), [(Δ)‐Trisphat] support the formation of specific diastereomeric ion pairs. Such intermolecular interactions can be related to the self‐assembly of the two‐dimensional optically active compounds {[(Sp)‐1‐CH2N(n‐C3H7)3‐2‐CH3C5H3FeC5H5][Mn (Δ)‐Cr(C2O4)3]} and {[(Rp)‐1‐CH2N(n‐C3H7)3‐2‐CH3C5H3FeC5H5][Mn (Λ)‐Cr(C2O4)3]} starting from the resolved (Rp)‐ and (Sp)‐[1‐CH2N(n‐C3H7)3‐2‐CH3C5H3FeC5H5]+ ion associated to the racemic anionic building block rac‐[Cr(C2O4)3]3− and Mn2+. Both enantiomeric forms of the networks behave as ferromagnets with a Curie temperature of 5.7 K.
Structure–Composition Relations for the Partly Disordered Hume‐Rothery Phase Ir7+7δZn97−11δ (0.31≤δ≤0.58)
Authors: Hornfeck Wolfgang , Thimmaiah Srinivasa , Lee Stephen , Harbrecht Bernd 
Published: August 2004

AbstractThe crystal structure, its variation within the homogeneity range and some physical properties of the new zinc‐rich, partly disordered phase Ir7+7δZn97−11δ (0.31≤δ≤0.58) are reported. The structures of three phases with distinct composition were determined by means of single crystal X‐ray diffraction. Ir7+7δZn97−11δ exhibits a significant homogeneity range, adopts a complex γ‐brass related cubic structure (cF403–406), is stable up to 1201(2) K, and transforms sluggishly below 1048(4) K into a phase with 394 atoms in the monoclinic primitive unit cell. It is a diamagnetic, moderate metallic conductor. Six distinguishable clusters consisting of 22–29 atoms comprise the structure. The clusters are situated about the 16 high symmetry points of the cubic F lattice. The structure can be subdivided into two partial structures, one with constant composition IrZn5 and 192 atoms per unit cell and a second being significantly richer in zinc with variable composition and 211–214 atoms per unit cell. The meandering triply periodic minimal surface of two interpenetrating diamond‐like nets separates the compositionally variable from its complementary invariant part. The phase width is coupled with substitutional and positional disorder. A comprehensive analysis of composition‐dependent site occupancy factors reveals a linear correlation between the various types of disorder which can be conclusively interpreted in terms of an incoherent intergrowth of distinctive partial structures in variable proportions on a length scale comparable to the size of the approximately 2 nm large unit cell. On the basis of the structural findings we derive the structure chemically meaningful formula Ir7+7δZn97−11δ which quantitatively accounts for the interrelation between substitutional and positional disorder and provides a measure for the homogeneity range in structural terms.
Molecular Wheel B2‐8 as a New Inorganic Ligand. Photoelectron Spectroscopy and ab initio Characterization of LiB‐8.
Authors: Alexandrova Anastassia N. , Zhai Hua‐Jin , Wang Lai‐Sheng , Boldyrev Alexander I. 
Published: August 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
The Binary Group 4 Azides [Ti(N3)4], [P(C6H5)4][Ti(N3)5], and [P(C6H5)4]2 [Ti(N3)6] and on Linear Ti—N—NN Coordination.
Authors: Haiges Ralf , Boatz Jerry A. , Schneider Stefan , Schroer Thorsten , Yousufuddin Muhammed , Christe Karl O. 
Published: August 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
A Novel Enantioselective (2Z)‐Alk‐2‐enylation of Aldehydes via an Allyl‐Transfer Reaction from Chiral Allyl Donors Prepared from (+)‐Isomenthone.
Authors: Nokami Junzo , Nomiyama Kenta , Shafi Siddiqi M. , Kataoka Kazuhide 
Published: August 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
An Unusual Approach to the Synthesis of Enantiomerically cis Linear Homoallylic Alcohols Based on the Steric Interaction Mechanism of Camphor Scaffold.
Authors: Lee Chi‐Lik Ken , Lee Cheng‐Hsia Angeline , Tan Kui‐Thong , Loh Teck‐Peng 
Published: August 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Functionalized Carbo‐ and Heterocycles via Pt‐Catalyzed Asymmetric Alkoxycyclization of 1,6‐Enynes.
Authors: Charruault Lise , Michelet Veronique , Taras Rossana , Gladiali Serafino , Genet Jean‐Pierre 
Published: August 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
A Study on the Regio‐ and Stereoselectivity in Palladium‐Catalyzed Cyclizations of Alkenes and Alkynes Bearing Bromoaryl and Nucleophilic Groups.
Authors: Bruyere Didier , Bouyssi Didier , Balme Genevieve 
Published: August 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Hydroxylation of Alkyl Halides with Water in Ionic Liquid: Significantly Enhanced Nucleophilicity of Water.
Authors: Kim Dong Wook , Hong Dong Jin , Seo Jai Woong , Kim Hoon Sik , Kim Hong Kon , Song Choong Eui , Chi Dae Yoon 
Published: August 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
1‐(Alkyl/Arylthiocarbamoyl)benzotriazoles as Stable Isothiocyanate Equivalents: Synthesis of Di‐ and Trisubstituted Thioureas.
Authors: Katritzky Alan R. , Ledoux Stephane , Witek Rachel M. , Nair Satheesh K. 
Published: August 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Structure—Activity Relationships of Analogues of NF449 Confirm NF449 as the Most Potent and Selective Known P2X1 Receptor Antagonist.
Authors: Kassack Matthias U. , Braun Kirsten , Ganso Matthias , Ullmann Heiko , Nickel Peter , Boeing Barbara , Mueller Gregor , Lambrecht Guenter 
Published: August 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
New Synthesis of (S)‐Dimethyl‐4,4′‐dimethoxy‐5,6,5′,6′‐dimethenedioxy‐biphenyl‐2,2′‐dicar boxylate by Configuration Transform.
Authors: Cheng Sen‐Xiang , Chang Jun‐Biao , Qu Ling‐Bo , Chen Rong‐Feng 
Published: August 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Convenient and Efficient Reduction of 1,1′‐Binaphthyls to H8‐1,1′‐Binaphthyl Derivatives with Pd and Ru Catalysts on Solid Support.
Authors: Korostylev Andrei , Tararov Vitali I. , Fischer Christine , Monsees Axel , Boerner Armin 
Published: August 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
A Rapid and Direct Access to Symmetrical/Unsymmetrical 3,4‐Diarylmaleimides and Pyrrolin‐2‐ones.
Authors: Pal Manojit , Swamy Nalivela Kumara , Hameed P. Shahul , Padakanti Srinivas , Yeleswarapu Koteswar Rao 
Published: August 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
In vitro—in vivo Antifungal Evaluation and Structure—Activity Relationships of 3H‐1,2‐Dithiole‐3‐thione Derivatives.
Authors: Giannini Fernando A. , Aimar Mario L. , Sortino Maximiliano , Gomez Roxana , Sturniollo Alejandro , Juarez Americo , Zacchino Susana , de Rossi Rita H. , Enriz Ricardo D. 
Published: August 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis and Antiproliferative Activity of Triazenoindazoles and Triazenopyrazoles: A Comparative Study.
Authors: Daidone Giuseppe , Raffa Demetrio , Maggio Benedetta , Raimondi Maria Valeria , Plescia Fabiana , Schillaci Domenico 
Published: August 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
An Unusual Base‐Dependent α‐Alkylation and β‐Elimination of tert‐Butyl 2‐Phenyl‐2‐oxazoline‐4‐carboxylate: Practical Synthesis of (.+‐.)‐α‐Alkylserines and tert‐Butyl Benzamidoacrylate.
Authors: Park Hyeung‐geun , Lee Jihye , Kang Myoung Joo , Lee Yeon‐Ju , Jeong Byeong‐Seon , Lee Jeong‐Hee , Yoo Mi‐Sook , Kim Mi‐Jeong , Choi Sea‐hoon , Jew Sang‐sup 
Published: August 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis of Some 2‐[(Benzazole‐2‐yl)thioacetylamino]thiazole Derivatives and Their Antimicrobial Activity and Toxicity.
Authors: Turan‐Zitouni Guelhan , Demirayak Seref , Oezdemir Ahmet , Kaplancikli Zafer Asim , Yildiz Mehmet Taha 
Published: August 2004

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Synthesis of Tricyclic Isoindoles and Thiazolo[3,2‐c][1,3]benzoxazines.
Authors: Pinho e Melo Teresa M. V. D. , Santos Catarina I. A. , Rocha Gonsalves Antonio M. d' A. , Paixao Jose A. , Beja Ana M. 
Published: August 2004

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Synthesis, Crystal Structure and Antiproliferative Evaluation of Some New Substituted Benzothiazoles and Styrylbenzothiazoles.
Authors: Caleta I. , Grdisa M. , Mrvos‐Sermek D. , Cetina M. , Tralic‐Kulenovic V. , Pavelic K. , Karminski‐Zamola G. 
Published: August 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
The Synthesis and Structure—Activity Relationships of 3‐Amino‐4‐benzylquinolin‐2‐ones: Discovery of Novel KCNQ2 Channel Openers.
Authors: Hewawasam Piyasena , Chen Nathan , Ding Min , Natale Joanne T. , Boissard Christopher G. , Yeola Sarita , Gribkoff Valentin K. , Starrett John , Dworetzky Steven I. 
Published: August 2004

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One‐Pot Synthesis of Some New Spiro 6H‐Indolo[b‐1,2]quinazoline‐12‐one‐[1,2,4]triazolines.
Authors: Azizian Javad , Mohammadizadeh Mohammad R. , Javadi Maryam , Mohammadi Ali A. , Karimi Ali R. 
Published: August 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
N‐Acyl Substituted 7‐Amino‐4‐chloroisocoumarin: A Peptide Degradation Model via an Imide Mechanism.
Authors: Garino Cedrik , Bihel Frederic , Souard Florence , Quelever Gilles , Kraus Jean‐Louis 
Published: August 2004

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Novel Non‐covalent Thrombin Inhibitors Incorporating P1 4,5,6,7‐Tetrahydrobenzothiazole Arginine Side Chain Mimetics.
Authors: Marinko Petra , Krbavcic Ales , Mlinsek Gregor , Solmajer Tomaz , Bakija Alenka Trampus , Stegnar Mojca , Stojan Jure , Kikelj Danijel 
Published: August 2004

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Synthesis and Evaluation of anti‐Apoptotic Activity of L‐Carnitine Cyclic Analogues and Amino Acid Derivatives.
Authors: Fringuelli Renata , Utrilla Navarro M. Pilar , Milanese Lara , Bruscoli Stefano , Schiaffella Fausto , Riccardi Carlo , De Simone Claudio 
Published: August 2004

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Glycosidation Reactions of Silyl Ethers with Conformationally Inverted Donors Derived from Glucuronic Acid: Stereoselective Synthesis of Glycosides and 2‐Deoxyglycosides.
Authors: Polakova Monika , Pitt Nigel , Tosin Manuela , Murphy Paul V. 
Published: August 2004

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Synthesis and Nicotinic Acetylcholine Receptor Binding Affinities of 2‐ and 3‐Isoxazolyl‐8‐azabicyclo[3.2.1]octanes.
Authors: Cheng Jie , Izenwasser Sari , Zhang Chunming , Zhang Suhong , Wade Dean , Trudell Mark L. 
Published: August 2004

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Reaction of Sugars with 2‐Hydrazinopyridine, Precursors for Seco C‐Nucleosides of 1,2,4‐Triazolo[4,3‐a]pyridine.
Authors: El Ashry E. S. H. , Abdul‐Ghani M. M. 
Published: August 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Betuligenol Derivative with Growth Inhibition and Antifeedant Activity.
Authors: Chattopadhyay Sunil K. , Srivastava Sachin , Sashidhara Koneni V. , Tripathi Arun K. , Bhattacharya Asish K. , Negi Arvind S. 
Published: August 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Cytotoxic and anti‐HIV Principles from the Rhizomes of Begonia nantoensis.
Authors: Wu Pei‐Lin , Lin Fu‐Wen , Wu Tian‐Shung , Kuoh Chang‐Sheng , Lee Kuo‐Hsiung , Lee Siow‐Ju 
Published: August 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Hydrothermal Synthesis of Ultraviolet‐Emitting Cerium Phosphate Single‐Crystal Nanowires.
Authors: Bu Wen‐Bo , Hua Zi‐Le , Chen Hang‐Rong , Zhang Ling‐Xia , Shi Jian‐Lin 
Published: August 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
1,3‐Dihydro‐2H‐imidazol‐2‐one Derivatives: Synthesis and Use in Biotin Synthesis
Authors: Zav'yalov S. I. , Ezhova G. I. , Kravchenko N. E. , Kulikova L. B. , Dorofeeva O. V. , Rumyantseva E. E. , Zavozin A. G. 
Published: August 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Some Aspects of Combinatorial Catalysis and Materials Research
Authors: Maier Wilhelm F. , Frantzen Andreas , Frenzer Gerald , Kirsten Guido , Saalfrank Jens , Scheidtmann J. , Stutz Bemd , Thome Christian , Weiss Pierre‐A. W. , Wolter Tina 
Published: August 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synchronous bilateral ureteral and renal pelvic carcinomas
Authors: Holmäng Sten , Johansson Sonny L. 
Published: August 2004

AbstractBACKGROUNDSynchronous bilateral urothelial tumors of the upper urinary tract are very rare. The authors reported baseline and long‐term follow‐up data for all patients in western Sweden during a 28‐year period.METHODSThe authors performed a clinical and histopathologic study of all patients in western Sweden who were diagnosed with a malignant neoplasm in the renal pelvis or ureter between 1971 and 1998.RESULTSOf 936 patients, 15 (1.6%) had synchronous bilateral tumors. The incidence of such tumors decreased in each successive decade. Abuse of phenacetin‐containing analgesics by patients also decreased during the study period, as did the incidence of renal papillary necrosis. The median age at diagnosis of bilateral tumors was 68 years, and 80% of the patients were male. Eleven patients had bilateral tumors of the renal pelvis, two had bilateral ureteral tumors, and two had tumors of the renal pelvis and contralateral ureter. Partial renal pelvic, ureteral, or kidney resection on at least one side was possible in eight patients, and four patients were left untreated on at least one side. Only three patients underwent bilateral nephroureterectomy. Twelve patients (80%) had bladder carcinoma diagnosed either before or after diagnosis of the upper tract tumors. The median survival period for the 11 patients who received surgery for their bilateral tumors was 84 months.CONCLUSIONSThe decreasing incidence of synchronous bilateral upper tract tumors may be related to the prohibition of phenacetin‐containing analgesics in the 1960s. Partial resection with preservation of the renal parenchyma was possible in the majority of patients. Survival for patients with bilateral tumors did not differ from that of patients with unilateral tumors. Cancer 2004. © 2004 American Cancer Society.