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Biomedical subjects

J Buck

Publications and source records attributed to J Buck.

86 records · Page 5Linked to original sources
PubMed1980

[The value of CT in the evaluation of bile ducts and gallbladder (author's transl)].

Initially, the history of radiographic diagnosis of the gallbladder is reviewed. Then, examples are given to demonstrate morphology and topography of a normally and an abnormally developed gallbladder. Then, CT findings of pathology of the biliary system are demonstrated, such as calculi, inflammation, hydrops and neoplasia. A postulation is made that not only should CT be used in cholestasis but also in a nonvisulized cholecystrogram. The value and the limitations of CT are pointed out, as well as the necessity to always include the evaluation of bile ducts and gallbladder in the analysis of obscure clinical upper abdominal findings.

Bile Duct Diseases↗
PubMed1980

[Pseudotumors of the female breast (author's transl)].

Pseudotumors which are recognized by mammorgraphy as dense areas, can be classified by careful patient anamnesis and inspection of the organ. In most cases these lesions can be correlated with scars or tumorous changes of the skin. The so-called "drawing-pin" phenomenon mainly is resulting from skin retraction by Cooper's ligaments and secondly from immediate invasion of the tumor. In all these cases short time radiographic follow-up examinations are recommended instead of surgery.

Breast Diseases↗
PubMed1980

[Computer assisted tomography of the normal and abnormal adrenal gland (author's transl)].

Initially, the hitherto existing radiographic methods of investigating the adrenal gland are demonstrated. Whole body CT opens a third dimension--in addition to being a non invasive method without risk. The normal CT findings of the adrenal gland are described, as well as the normal variants in shape and position. With help of morphometry and image manipulation, measurements of the size of the adrenal gland in 20 healthy patients were made and are being listed; and the respective normal variants as well as hypo- and hyperplasia are pointed out. Some examples serve to illustrate pathologic conditions, such as inflammation and benign and malignant primary and secondary neoplasia. Finally, the value of adrenal gland CT is discussed in reference to the other existing respective radiographic methods.

Adrenal Gland Diseases↗
PubMed1980

[Post-thrombotic syndrome of the lower extremities (author's transl)].

The postthrombotic syndrome with chronic venous insufficiency develops either gradually over a number of years or after a latent period of varying length. The clinical manifestations correlate with morphological and functional phlebographic findings of the superficial and deep veins. The conservative therapy of the post-thrombotic syndrome, consisting of anti-coagulant therapy, compression dressing or active physical exercise, must be consistently enforced. Indication of vascular surgical intervention should be carefully noted. Optimal examination of the patho-anatomical findings in the phlebogram is imperative as an important aid in decision-marking.

Collateral Circulation↗
PubMed1979

The "drug lunch".

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Advertising↗
PubMed1979

[Computerized tomography in the evaluation (author's transl)].

CT can clearly demonstrate dilation of intra- and extra-hepatic bile ducts due to mechanical obstruction. Note is made that the intrahepatic bile must not necessarily participate in dilation in obstructive jaundice. The cause in 27 cases observed in our institutions was as follows: 16 pancreatic tumors; 1 stone; 2 extrahepatic bile duct obstructions; 4 liver lesions (tumor and cirrhosis) and 4 with cause unknown. Furthermore, CT is helpful in the evaluation of hepatogenic non-obstructive jaundice such as due to primary liver cell carcinoma (hepatoma), metastases to the liver and advanced cirrhosis of the liver. The value of CT in the evaluation of different types of cholestasis is demonstrated by several exemplary cases; and the problems of differential diagnosis are pointed out.

Adenocarcinoma↗
PubMed1968

Mechanism of rhythmic synchronous flashing of fireflies. Fireflies of Southeast Asia may use anticipatory time-measuring in synchronizing their flashing.

In Thailand, male Pteroptyx malaccae fireflies, congregated in trees, flash in rhythmic synchrony with a period of about 560 +/- 6 msec (at 28 degrees C). Photometric and cinematographic records indicate that the range of flash coincidence is of the order of +/- 20 msec. This interval is considerably shorter than the minimum eye-lantern response latency and suggests that the Pteroptyx synchrony is regulated by central nervous feedback from preceding activity cycles, as in the human "sense of rhythm," rather than by direct contemporaneous response to the flashes of other individuals. Observations on the development of synchrony among Thai fireflies indoors, the results of experiments on phase-shifting in the American Photinus pyralis and comparisons with synchronization between crickets and between human beings are compatible with the suggestion.

Animals↗
PubMedDate not supplied

[Effect of lithium on the proliferation of fibroblasts and tumor cell lines in vitro].

The specificity of a proliferation-inducing effect of lithium was investigated. Cell lines of embryonal and adult solid tumors as well as fibroblasts were cultured in lithium-concentrations ranging from 0,5 to 5,0 mmol/l. Neuroblastoma-cell-lines SK-N-SH, SK-N-LO, IMR 32, osteosarcoma-cell-line SAOS 2, melanoma-line IgR 3 and a fibroblast-line were used in this study. Cell proliferation was measured with a 3H-TdR-incorporation-assay and a tumor-stem cell-assay, the fibroblast-proliferation was measured following growth as monolayer respectively. No stimulation of proliferation was observed. The data of this in vitro study are basic for the clinical evaluation of the benefit of lithium in attenuation of chemotherapy induced leukopenia in patients with solid tumors.

Cell Division↗