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Rectal gastrointestinal stromal tumors (GIST) account for 0.1% of all rectal tumors. They are generally diagnosed in adults over 50 years of age with non-specific symptoms. Immunohistochemistry performed on biopsy tissue sample confirms the diagnosis. In this study, we report two cases of histologically and immunohistochemically confirmed rectal GISTs diagnosed using Endoscopic ultrasound (EUS) with fine needle aspiration (FNA), a procedure of crucial value in the diagnosis of these tumors. Both patients were male, presenting with non-specific symptoms. Standard endoscopy showed a rectal mass in both cases, biopsies were negative. EUS showed a well-defined hypoechoic mass and evaluated adjacent organs and of blood/lymphatic nodes involvement. EUS-FNA was performed in both cases. Cytology and immunocytochemistry studies showed spindle cell pattern with positive immunohistochemical staining for CD117, typical of GISTs.

1. Foreign bodies (FB) are a common emergency in endoscopy, it requires an endoscopic extraction in approximately 10-20% of cases, and in less than 1% surgical treatment is indicated to managed complications. The adult population at risk is represented by the elderly, patients with behavioral disorders or those with a physical risk factor, such as peptic or neoplastic stenosis, esophageal motor disorders or esophageal diverticula. The therapeutic strategy is decided on the basis of the patient, the location, the type of object, the presence of symptoms and the time of ingestion. Endoscopy must sometimes be preceded by an imaging examination (X- ray or CT scan), the purpose of which is to determine the nature of the object, its location and to look for possible complications. Obstructive, sharp, toxic or more than 6 cm long and 2 cm wide FB must be urgently extract. Complications are rare but can be severe, with esophageal perforation being the most common and feared. We report a retrospective study of 102 cases of ingestion of digestive foreign bodies.

Background: Solid pseudopapillary tumor of the pancreas (SPPT) or Frantz's tumor is a rare exocrine pancreatic tumor, it generally occurs among females within the second or third decade of life. The clinical symptomatology is non-specific, frequently presenting as a slowly growing abdominal mass without any biological abnormalities. The imaging usually shows a well-limited mass with little vascularity. Endoscopic ultrasound (EUS) with fine needle aspiration (FNA) helps the diagnosis. The treatment of these tumors is surgical, and the prognosis is excellent after complete resection. We report two new cases of Frantz tumor, detailing the clinicopathological features of this rare neoplasm. Case presentation: Case 1: A 19-year-old woman presented with middle upper abdominal pain. Computed tomography (CT) scan showed a solitary encapsulated mass in the pancreatic body. Endoscopic ultrasound showed a regular, well-defined, heterogenous lesion, measuring 50 × 46 cm, in the pancreatic body. endoscopic ultrasound fine-needle aspiration was then performed with cytopathological analysis compatible with SPPT. Body computed tomography confirmed the absence of metastases and she underwent a central pancreatectomy. 12 months after the diagnosis, she remains asymptomatic, continuing regular follow-up. Case 2: A 22-year-old woman presented with epigastric pain and weight loss. CT scan revealed a single 5 cm well defined mass in the pancreatic head. EUS showed a well-defined heterogenous hypoechoic encapsulated mass in the pancreatic head, measuring 64 × 44 mm; EUS-FNA was performed and cytopathological analysis was suggestive of SPPT. She underwent conventional cephalic duodenopancreatectomy. She presented septic postoperative complications, with a favorable outcome after medical and surgical therapy. she remains asymptomatic, after 6 months follow-up. Conclusion: Solid pseudo papillary pancreatic tumor is a rare exocrine low-grade neoplasm. EUS is a sensitive tool in the diagnosis of SPPT, identifying and characterizing the pathologic lesions, and allowing EUS-FNA with cytomorphological recognition, making it an invaluable tool for establishing diagnosis, helping clinical management and surgical planning.

Pancreatic metastases from lung cancer are uncommon, usually asymptomatic, and tends to indicate a poor outcome. We report a new case of symptomatic pancreatic metastasis from an adenocarcinoma of the lung. Case Presentation: A 60-year-old male presented with middle upper abdominal pain. Computed tomography (CT) scan showed acute pancreatitis features and identified pulmonary nodules, further investigations established the diagnosis of stage IV lung adenocarcinoma with pancreas, bone and lymph nodes metastases. During the follow-up, the patient presented with obstructive jaundice and was managed with biliary stent placement. Conclusion: Pancreatic metastasis of lung cancer is infrequent. Symptomatic cases are rare; the patients usually present at an advanced stage with widespread disease, making early diagnosis difficult, and in most cases, patients are managed with palliative therapy.

Complexes of metal (II) halides with N-methyl-1,2,4-triazoles have been prepared, characterized, and studied by magnetism, and electronic and vibrational spectroscopies. The complex with 1:4 stoichiometry is monomeric; those of 1:1 or 1:2 stoichiometries are polymeric. It is seen from electronic studies that metal ions are trans-octahedrally coordinated and chromophores are MX4N2 or MX2N4. These structural results are in accordance with the magnitude of magnetic exchange between metallic ions. The effects of metal–ligand bond formation on the vibrational modes of the studied N-methyl-triazoles show the coordination mode of the ligand. In the low-frequency range, assignments of metal–nitrogen and metal-halide stretching vibrations confirm advanced structural proposals.

The monoclinic phosphates with K3Ln(PO4)2 (Ln=rare earth) formula were synthesized. Their infrared and Raman spectra have been reported and analysed. The results of a force field calculation for K3Nd(PO4)2 are presented.

The monoclinic pyrophosphates with AMP2O7 formula were synthesized. Their infrared and Raman spectra have been reported and analysed. The results of a force field calculation for CaCuP2O7 are presented.

L'etude vibrationnelle des 3,4'-bitriazole, 5-methyl-3,4'-bitriazole et 5-bromo-3,4'- bitriazole a ete effectuee et une attribution de leurs vibrations fondamentales a ete proposee sur la base de l'existence d'une seule forme a l'etat solide. La substitution de l'hydrogene en position 3 du cycle triazolique {1H} par un groupement 4-triazolyle entraine une diminution de la force de la liaison hydrogene NH...N comparativement au 1,2,4-triazole et a ses derives C-monosubstitues. L'introduction d'un substituant en position 5 du biheterocycle augmente la force de l'autoassociation surtout dans le cas ou le substituant est un groupement attracteur d'electrons. A partir des frequences νNH, l'estimation des distances N...N dans ces derives a ete effectuee. La distinction entre les vibrations du cycle triazolique et celles du groupement 4-triazolyle semble impossible, probablement a cause de la conjugaison des deux cycles. La frequence plus elevee obtenue pour la vibration de valence de la liaison intercyclique dans le cas du BrbTA est explicable par une conjugaison plus forte et une liaison C-N plus courte dans ce dernier.

La 4-methyl-1,2,4-triazole-thione cristallise dans un systeme monoclinique avec un groupe d'espace P21/n. Les parametres cristallins sont : a = 7,946 A ; b = 6,295 A ; c = 20,901 A ; β=100,47○ et Z = 8. L'affinement de la structure a conduit aux facteurs R = 0,047 et Rw = 0,035. Les molecules sont planes et sont liees entre elles par des liaisons hydrogene N- - -H....N. Parmi les deux formes tautomeres possibles pour cette molecule, seule existe dans le cristal, la forme thione.

Resume Les spectres de vibration des triazole-thione, 1-methyl-triazole-thione, 4-methyl-triazole-thione, 1,4-dimethyl-triazole-thione et de leurs homologues deuteries ont ete examines entre 4000 et 200 cm−1 et une attribution de l'ensemble des vibrations fondamentales a ete proposee. Il ressort de cette analyse qu'une seule forme existe pour la triazole-thione et ses derives N-monomethyles a l'etat solide. La comparaison des spectres de vibration de la 4-methyl-triazole-thione a l'etat solide avec ceux des differentes solutions dans differents solvants polaires permet d'expliquer le dedoublement des absorptions rattachees aux modes γCH et γNH dans le cas de cette molecule par des vibrateurs CH et NH dans des environnements differents.

Resume La synthese des composes de type K 2 RbLn(PO 4 ) 2 (Ln est Ce, …, Lu) a ete realisee par voie seche. L'analyse des diagrammes de poudre et des spectres de vibration de cette famille nous a amene d'une part a considerer deux types de symetrie, une monoclinique isotype de K 3 Nd(PO 4 ) 2 et l'autre rhomboedrique isotype de K 3 Lu(PO 4 ) 2 , d'autre part, a mettre en evidence une transition de phase par effet de pression pour le compose K 2 RbHo(PO 4 ) 2 . Une caracterisation des differents domaines de frequences vibrationnelles a ete effectuee.

In order to give a better insight into the vibrational properties of anthocyanins, the synthesis and the vibrational studies of some hydroxyflavylium derivatives with a controlled substitution pattern have been performed. The IR, Raman and resonance Raman spectra of the investigated hydroxyflavylium compounds have been recorded in the solid and solution states. A number of lines have been assigned on the basis of deuterium isotopic shifts, resonance enhancement and previous studies on parent compounds. An attempt has been made to analyze the influence of hydroxy substituents on vibrational properties of the investigated flavylium cations.

Raman and infrared spectra of 4-methyl-1,2,4-triazolethione showed that two crystalline phases, one stable and the other metastable, can be obtained from various crystallization processes. The metastable phase transforms into the stable phase at 395 K by an irreversible first-order phase transition. The two phases were characterized spectroscopically and structural properties are discussed. Copyright © 2000 John Wiley & Sons, Ltd.

The conventional ab initio method at the closed restricted Hartree-Fock level (RHF) and the density functional theory (DFT) approach at the B3-LYP level, using the 6-31+G* basis set, are applied to predict the molecular structure and the energetic and the vibrational properties (harmonic wave numbers, force fields and potential energy distributions) of the 3,4'-bi-1,2,4-triazole and of two deuterated derivatives (ND and ND(CD)(3)). The theoretical results are compared to the Raman and infrared vibrational data. Using both methods, there is a very good agreement between theory and experiment concerning not only the wave numbers but also the isotopic shifts. This accordance allows us to validate the calculated structure of bTA. This molecule is characterized by an aromatic structure in which two triazolic rings are linked by a CN bond, intermediary between a single and double bond, in a planar conformation. From a methodological point of view, the B3-LYP method predicts more accurate structure and harmonic vibrational wave numbers than the RHF method.

The monoclinic phosphates with K3Ln(PO4)2 (Ln=rare earth) formula were synthesized. Their infrared and Raman spectra have been reported and analysed. The results of a force field calculation for K3Nd(PO4)2 are presented.

The infrared and Raman spectra of chlorhydrates of 1-methyl 1,2,4-triazolium 1-methyl C-halogeno 1,2,4-triazolium have been obtained in the 1600-200 cm −1 range. An assignment of the fundamental vibrations is proposed and the effect of protonation is discussed.

Vibrational spectra of some N-methyl chloro and N-methyl bromotriazoles-1,2,4 are reported. An assignment of the normal modes is proposed. This study was done in order to find new elements to solve the problem of tautomerism in C-substituted triazoles-1,2,4.

Les spectres de vibration des chlorhydrates de methyl-1 et de methyl-1 C-halogeno triazoliums-1,2,4 ont ete etudies entre 4 000 et 1 600 cm-1 . Une attribution des vibrations de valence des groupements C-H et N-H de ces systemes a ete proposee. Il a ete montre a partir de cette etude que le site de protonation est l'azote N4 dans les methyl-1 triazole et methyl-1C-halogenotrlazoles-1,2,4. La comparaison de ces spectres avec ceux des chlorhydrates de C-halogeno triazoliums-1,2,4 a permis de proposer l’azote N, comme site de protonation dans ces derniers. Les resultats donnes par la methode de calcul MNDO sont en accord avec ceux de la spectroscopie de vibration. Une analyse par spectrometrie UV a permis de noter que la protonation n'affecte pas le systeme d'electrons π conjugues et que l’effet de la liaison hydrogene N+ -H...Cl- se manifeste par une exaltation de l’intensite des bandes d'absorption.

Vibrational spectra of 4-methyl-1,2,4-triazole, its hydrochloride salt, and some of their deuterated homologs have been studied from 4000 to 200 cm−1. An attribution of most of the fundamental modes is proposed, and the effect of protonation on fundamental frequency values is explained.