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Biomedical subjects

J Ueki

Publications and source records attributed to J Ueki.

14 recordsLinked to original sources
PubMed1992

Malignant fibrous histiocytoma of the liver: a case report and review of the literature.

Primary malignant fibrous histiocytoma (MFH) of the liver is reported in a 79-year-old man. The tumor, measuring 8.0 x 8.0 x 6.0 cm, was located in the left lobe of the liver and consisted of spindle cells in a storiform pattern intermingled with bizarre giant cells. Immunohistochemically, most of the tumor cells expressed vimentin. Cytoplasmic immunoreactivity for alpha 1-antichymotrypsin was documented in the giant cells. However, epithelial expression could not be demonstrated.

Aged↗
PubMed1992

[Application of ultrasonography in chest diseases--usefulness of ultrasonography and physiologic evaluation of low pressure vascular system].

Air and bones, which limit echo penetration to the lesion, are the major components of the thorax. Recently, however, there have been many reports concerning the valid application of ultrasonography for evaluation of chest diseases. In this paper, we report the usefulness of ultrasonography to analyze thoracic lesions based on our experience. Generally, ultrasonography is a method providing high resolution and real-time images. Using these characteristics, we tried to obtain physiological information concerning the hemodynamics of the right heart system. We addressed the results of our studies using ultrasonography as follows; 1) relationship between ventilatory change of IVC and central venous pressure, 2) estimation of pulmonary arterial pressure by measuring the size of the pulmonary artery, 3) dynamic changes of SVC configuration.

Hemodynamics↗
PubMed1991

[Dynamic changes in superior vena caval configuration based on posture].

To noninvasively study positional effects on superior vena caval configuration in humans, endoscopic ultrasonography was performed in 34 subjects including 20 with lung cancer, 5 with esophageal cancer and 9 with other diseases. None of the these subjects had cardiovascular involvement or respiratory dysfunction. A fiberoptic esophagoscope equipped with a 7.5 MHz linear array ultrasonic transducer at its tip (EPE-703, Toshiba-Machida) was used for the study. The actual movement of the superior vena cava (SVC) was clearly observed at the hilar level in all cases. During the cardiac cycle the anteroposterior diameter of the SVC was observed to reach a maximum at the atrial systole and reached a minimum at the late ventricular systole. With respiration, the SVC increased in diameter during inspiration and decreased during expiration. Moreover M and B mode figures of the SVC wall were recorded in left (LLD) and right decubitus (RLD) and supine position (SUP) in 34 subjects. On quiet ventilation of FRC level the diameter of the SVC was unchanged. Both the maximal and minimal diameters of the SVC, which were corrected for body surface area (BSA), were 11.3 +/- 0.3 (mean +/- SEM) mm/m2 and 9.8 +/- 0.3 mm/m2 in right lateral decubitus position, 9.4 +/- 0.3 and 7.9 +/- 0.3 in the supine position, 8.5 +/- 0.3 and 7.1 +/- 0.3 in the left lateral decubitus position, respectively. The size of the SVC was the greatest in the right lateral decubitus position and was the smallest in left lateral decubitus position (p less than 0.01, multiple comparison). It was suggested that the geometry of the SVC is influenced by thoracic pressure and gravity and that it behaves very similarly to pulmonary vascular vessels as a collapsible tube.

Adult↗
PubMed1991

[Radiographic visualization of pleural space under negative pleural pressure].

Although many imaging modalities have developed in the area of pulmonary medicine, information about the condition of pleural surface is limited. In this study, we carried out contrast pleurography under negative pleural pressure in dogs and humans to evaluate the condition of the pleural space including adhesion between the two pleural layers, incomplete fissure and features of the pleural surface. After insertion of a flower-type catheter into the pleural space under ultrasonic guidance, contrast material (60% Meglumine iotalamate, Conray 60, 0.5-1.0 ml/kg) was injected into the pleural space through the catheter. In dogs with intact pleura, contrast material distributed to the pulmonary surface, including interlobar spaces, rapidly. In dogs with pleural adhesion which was induced artificially with talc, affected areas were visualized as defects of contrast material. In humans, this contrast pleurography provided information about pleural adhesion, pulmonary lobulation, extent of cancer to neighbouring lobes, irregular pleural surface due to bullae formation and pleural indentation by cancerous lesion. There was no serious complication in dogs and human studies. This contrast pleurography is unique because it is possible to evaluate the pleural space physiologically under negative pressure condition. It may be concluded that this method of pleurography is useful for the clinical evaluation of the condition of the pleura in various lung diseases.

Adult↗
PubMed1990

[Two cases of mediastinal goiter with progressive deviation of the trachea by its growth and their thyroid hormone values in the fluid of the cystic lesions].

We reported two operated cases (a 35-year-old male and 52-year-old male) of mediastinal goiter accompanied by marked tracheal deviation. The two patients did not have any clinical symptoms. CT, MRI, ultrasonography and angiography finding of the two cases are presented. Fluid was obtained from the cystic lesions by ultrasonically guided needle aspiration. The levels of thyroid hormones (T3, T4) in the fluid were not high in comparison with serum levels. Surgical resection was performed on the 35-year-old male case by collar incision and on the 52-year-old male case by median sternotomy.

Adenoma↗
PubMed1989

Peripheral T-cell lymphomas. Immunologic and enzyme histochemical analysis of 15 cases.

Fifteen cases of peripheral T-cell lymphoma were studied to evaluate the respective properties of various histologic types using enzyme histochemical and ultrastructural examinations in addition to immunological methods. Eleven cases in an ATLA-negative group manifested various histologic patterns such as IBL-like, pleomorphic and Lennert's lymphomas in comparison with the relatively monomorphic proliferation of neoplastic lymphoid cells in the 4 ATLA-positive cases. The presence of neoplastic clear cells is characteristic of peripheral T-cell malignancies, and is likely to be found in CD4+ lymphomas. There is an occasional reaction of epithelioid histiocytes and plasma cells with eosinophils, the former being designated Lennert's lymphoma and the latter IBL-like T-cell lymphoma. Immunological examination revealed four immunophenotypic patterns: (1) CD2+3+4+8-, (2) CD2+3-4+8-, (3) CD2+3+4-8+, and (4) CD2+3+4+8+, but did not provide information concerning the intimate relationship between histologic types and immuno-phenotypes. beta-Glucuronidase reactivity, however, contributed to the distinction between helper and suppressor T-cell malignancies, suggesting its usefulness for distinguishing these two cell types and their malignant counterparts.

Adult↗
PubMed1989

[Analysis of mediastinal lymphadenopathy in sarcoidosis with transesophageal ultrasonic endoscopy; influences on cardiovascular system].

We studied influences of mediastinal lymphadenopathy on cardiovascular system in nine cases of sarcoidosis with transesophageal ultrasonic endoscopy. Chest x-ray films revealed bilateral hilar lymphadenopathy in all cases, whose diagnoses were made histologically with biopsies of peripheral lung through flexible fiber optic bronchoscope and/or of lymph nodes. These findings were typical in this disease. Many compartments of cardiovascular system in mediastinal and hilar regions were visible with this technique in all subjects. And enlarged lymph nodes changed dimensions in these compartments, especially in main pulmonary arteries, left atria, pulmonary veins and aorta. Furthermore, these phenomena were seen in azygos vein and superior caval vein in some cases. It is suggested that these lymph nodes may influence hemodynamics in above-mentioned compartments of cardiovascular system, if this phenomenon deteriorates more progressively.

Adolescent↗
PubMed1988

Isolation of a peptide associated with autoimmune haemolytic anaemia from red cell membranes.

A 12,000 molecular weight (12 kD) peptide which did not relate to immunoglobulins or complements was purified from the supernatants of dispase-treated red cells of four patients with autoimmune haemolytic anaemia (AIHA). The isoelectric point (pI) was about 5.3. This peptide was not obtained from normal persons and patients with other haemolytic anaemias. The peptide and the red cell autoantibody disappeared in a patient with angio-immunoblastic lymphadenopathy with dysproteinaemia (AILD) after intensive chemotherapy. The result indicates an abnormality in the composition of red cell membrane proteins in AIHA.

Adult↗
PubMed1986

Alterations of blood group antigens in angio-immunoblastic lymphadenopathy with dysproteinemia.

Antigen analysis of the red cell membrane in a patient with angio-immunoblastic lymphadenopathy with dysproteinemia (AILD) with red cell autoantibody revealed that four blood group antigens had been acquired. These four antigens consisted of S of MNSs blood group, Lua of Lutheran blood group, and K and Kpa of Kell-Cellano blood group. These antigens disappeared and the Coombs' test became negative after complete remission induced by combination chemotherapy. Free amino acid analysis after Dispase treatment of red cell membrane suggested that the antigenic modifications were associated with abnormal composition of amino acids.

Amino Acids↗