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Biomedical subjects

P Ray

Publications and source records attributed to P Ray.

At least 181 records · Page 10Linked to original sources
PubMed1988

Prostatic ultrasound in follow-up of prostatic disease.

Longitudinal and radial transrectal prostatic ultrasound techniques were compared for their consistency and reproducibility in recording prostatic size. While the longitudinal image at the 12:00 position was consistent, radial scanning was variable depending on whether the apex, mid, or base aspects of the prostate were scanned. It is recommended that protocols requiring serial measurements of prostate size utilize a longitudinal ultrasonic transducer and scan at the 12:00 position.

Aged↗
PubMed1988

Inferior vena cava thrombosis. Unusual presentation of testicular tumor.

We report an unusual case of testicular tumor presenting as thrombosis of the inferior vena cava. However, in contrast to a previous report, thrombosis in this patient was not caused by compression of the vena cava by neoplasm metastases. In our patient, we postulate that tumor invaded the vena cava and that thrombosis was exacerbated by a hypercoagulable state induced by the tumor.

Adult↗
PubMed1988

Persistent müllerian duct syndrome in a man with transverse testicular ectopia.

A 33-year-old Pakistani man with transverse testicular ectopia underwent surgery for repair of a left inguinal hernia. At operation a uterine structure with attached vasa deferentia was found in the left inguinal area and it was removed. Transverse testicular ectopia has been reported previously in association with the persistent müllerian duct syndrome. A deficiency of activity of a müllerian inhibiting substance during gestation is believed to be responsible for this syndrome. Most patients usually are sterile. Cloning of the gene for a müllerian inhibiting substance should permit studies of the pathogenesis of the persistent müllerian duct syndrome.

Adult↗
PubMed1988

Role of transurethral resection of the prostate in hematogenously disseminated metastasis.

Dissemination of tumor cells by vascular channels seems to be enhanced by certain surgical procedures, e.g. transurethral resection of the prostate, an operative procedure commonly used in the diagnosis and management of prostatic cancer, the third biggest killer of men in the United States. Circulating tumor cells have been the subject of great controversy as they are considered to be the connecting link between the primary tumor and the hematogenously disseminated metastatic growths. Isolation and identification of tumor cells which get released into the vascular channels is somewhat complicated. We report our experience with a technique for isolating and identifying prostatic tumor cells in the circulation and briefly discuss the role of transurethral resection of the prostate in the management of prostatic cancer.

Humans↗
PubMed1987

Inhibition of sensitized leukocyte's in vitro reactivity by circulating immune complexes in prostate cancer.

Circulating immune complexes in the sera of patients with confirmed histological diagnosis of carcinoma of the prostate, were found to interfere in the sensitized leukocyte's in vitro reactivity to prostate cancer associated antigen as evaluated by tube leukocyte adherence inhibition assay, thereby suggesting an inhibitory role of such serum factors in host's anti tumor cell mediated immune responses.

Adenocarcinoma↗
PubMed1987

Lymphocyte subsets in urologic cancer patients.

Peripheral blood T lymphocyte subsets were quantitated by monoclonal antibodies in 91 patients with urologic malignancies as well as eight age-matched controls. In general, the presence of cancer and increasing stage were associated with a relative decrease in helper and an increase in suppressor T-cell activity as well as a decreased T4/T8 cell ratio. Therapy in the form of androgen depletion reversed these trends and restored helper and suppressor levels as well as the T4/T8 ratio to control values. In a small subset of sixteen patients surgery had only modest immediate (prostate) and long term (kidney) effects on these parameters.

Androgens↗
PubMed1987

Benign fibrous ureteral polyps.

Benign fibrous polyps of the ureter are rare. A review of the English literature since 1930 revealed that 71 cases had been described. Three additional cases of fibrous ureteral polyps, one in a ureter with ureteritis cystica, are reported with a discussion of both the histologic findings and proposed treatment plan.

Adult↗
PubMed1987

An evaluation of prostate specific antigen in prostatic cancer.

Prostate specific antigen levels were measured in 118 patients with prostatic cancer and 138 control individuals. Prostate specific antigen was sensitive in detecting prostatic cancer. The levels of prostate specific antigen were elevated in 10 per cent of the patients with stage A, 24 per cent with stage B, 53 per cent with stage C and 92 per cent with stage D disease. However, prostate specific antigen levels also were elevated in 9 per cent of the patients with benign prostatic hypertrophy. This lack of specificity in the presence of benign prostatic hypertrophy probably precludes prostate specific antigen from being recommended as a screening test for prostatic cancer. The ultimate role of prostate specific antigen might be as the marker of choice to monitor therapy for prostatic carcinoma.

Antigens↗
PubMed1987

Molecular heterogeneity of translocations associated with muscular dystrophy.

Individual translocation chromosomes from six girls suffering from Duchenne or Becker muscular dystrophy (DMD or BMD) have been isolated in human-mouse somatic cell hybrids. DNA prepared from these hybrids was probed with sequences physically close to the locus; these include a junction fragment from the site of the X:21 translocation (pXJ1) and subclones from the pERT 87 (DXS164) region which are absent in a minority of male DMD patients. Both sets of sequences mapped within the area defined by the translocation breakpoints, confirming their close proximity to the DMD and BMD loci. Furthermore, the X chromosome breakpoints of the translocations can be divided into three categories depending upon their position in relation to the sequences recognised by pXJ1 and pERT 87. The genomic target disrupted by the translocations examined here is a minimum of 176 kb.

Chromosome Mapping↗
PubMed1987

Replication and packaging of choleraphage phi 149 DNA.

The intercellular replication of the circularly permuted DNA of choleraphage phi 149 involves a concatemeric DNA structure with a size equivalent to six genome lengths. The synthesis of both monomeric and concatemeric DNAs during replication of phi 149 occurred in the cytoplasm. The concatemers served as the substrate for the synthesis of mature phage DNA, which was eventually packaged by a headful mechanism starting from a unique pac site in the concatemeric DNA. Packaging of DNA into phage heads involved binding of concatemeric DNA to the cell membrane. A scheme involving sequential packaging of five headfuls proceeding in the counterclockwise direction from the pac site is proposed. After infection under high-phosphate conditions, the concatemeric DNA intermediates were not formed, although synthesis of monomeric molecules was unaffected.

Bacterial Proteins↗
PubMed1987

An evaluation of five tests to diagnose prostate cancer.

In an effort to determine which of five tests was the most efficient in the diagnosis of prostate cancer, 280 male patients were screened employing aspiration cytology, transrectal ultrasound, acid phosphatase, prostate specific antigen, and the digital rectal examination. The digital rectal examination was the most efficient (75%) and in order of decreasing accuracy were prostate specific antigen (74%), prostatic ultrasound (71%), acid phosphatase (66%), and finally aspiration cytology (63%). In an era when what are more expensive and more technology are assumed to be better, what is simple and traditional is ignored. From an evaluation of these patients it appears that the digital rectal examination still retains its diagnostic efficiency. Finally, in this age of escalating medical costs and physician accountability for these expenses, you can't beat the cost - benefit ratio for the old fashioned rectal exam.

Acid Phosphatase↗
PubMed1987

Theophylline treatment in the extubation of infants weighing less than 1,250 grams: a controlled trial.

The role of theophylline in weaning infants weighing less than 1,250 g at birth from mechanical ventilation was evaluated. Infants were randomized into control or theophylline treatment groups when they required minimal ventilatory support (peak inspiratory pressure 12 cm H2O, positive end-expiratory pressure 2 cm H2O, rate 12 breaths per minute, and FiO2 less than 0.3), and they were extubated 24 hours later. Infants required reintubation if they had (1) PaCO2 greater than 55 mm Hg and pH less than 7.20, (2) FiO2 greater than 0.5, or (3) apnea associated with a heart rate less than 100 beats per minute that required frequent stimulation (more than 20 episodes during a 16-hour period). Among 32 infants (birth weight less than 1,000 g) who reached minimal ventilatory support before seven days after delivery, 13 of 18 (72%) control infants required reintubation, whereas only four of 14 (28%) theophylline-treated infants required reintubation. On the other hand, among infants (birth weight less than 1,000 g) who reached minimal ventilatory support after seven days following delivery, only one of six (17%) of the control group required reintubation and no improvement could be seen with theophylline treatment. Similarly, among control infants (birth weight 1,001 to 1,250 g), only ten of 45 (23%) required reintubation after reaching low intermittent manditory ventilation settings. In summary, most infants recovering from respiratory distress syndrome who had birth weights (1) greater than 1,000 g or (2) less than 1,000 g and who were older than seven days could be successfully extubated from minimal ventilatory support without theophylline treatment.(ABSTRACT TRUNCATED AT 250 WORDS)

Apnea↗
PubMed1987

Techniques in the fine needle aspiration biopsy of the prostate.

In general, aspiration cytology of the prostate has not been a frequently used technique, in part because all too often there has been a poor yield of cells for cytologic evaluation. The objective of this investigation was to evaluate various needle designs and techniques for obtaining specimens and making slides. Cadaver prostates and surgical specimens were used to evaluate a series of 22 gauge aspiration needles. Cytology slides were fixed and stained with either Papanicolaou or hematoxylin and eosin stain. Coded slides were assigned a score representing the number of fields (magnification X 40) covered. The angle of the bevel or the size of the side-port (0.030 inch long and 0.01 inch deep or 0.045 inch long and 0.01 inch deep) did not significantly affect the results. However, the presence of the side-eye on a control spinal needle or an existing Franzen aspiration needle significantly improved the yield of cells (P less than .05). Frosted and non-frosted slides were evaluated as well as other techniques for making smears. In conclusion, an outline for making cytologic slides for aspirations of the prostate is presented.

Biopsy, Needle↗
PubMed1986

A physical map of 4 million bp around the Duchenne muscular dystrophy gene on the human X-chromosome.

Employing pulsed field gradient electrophoresis, we constructed a 4.5 million bp (Mb) Sfil restriction map of the human X-chromosomal region p21, harboring genes for Duchenne (DMD) and Becker Muscular Dystrophy. In a DMD patient with additional chronic granulomatosis and retinitis pigmentosa, the proximal 3.5 Mb is deleted. Another DMD patient, with additional glycerol kinase deficiency and adrenal hypoplasia, lacks at least 3.3 Mb in the middle region, including marker C7 but not B24, placing C7 closer to DMD. Another DMD patient has a partial pERT-87 deletion of minimally 140 kb. Truncated Sfil fragments in a female X:21 translocation patient place the junction probe XJ1.1 115 kb from the distal end of the normal fragment. Probe pERT-84 maps to the same fragment, within 750 kb of XJ1.1.

Chromosome Aberrations↗
PubMed1986

Signal peptidases.

Explore the source record for details and available documents.

Amino Acid Sequence↗
PubMed1986

Safety and efficacy of intravesical aminocaproic acid for bleeding after transurethral resection of prostate.

There appears to be no clinically significant difference in blood loss or transfusion requirements after transurethral resection of the prostate (TURP) when intravesical 0.5% aminocaproic acid is compared with 0.9% sodium chloride irrigation in patients during the first three days after surgery. This is probably because early post-TURP bleeding is due to inadequate hemostasis or perforation of the prostatic capsule, and not excessive local or systemic fibrinolysis. However, we suggest that intravesical aminocaproic acid might be a useful alternative to systemic antifibrinolytic therapy in patients with delayed, recurrent, excessive post-prostatectomy bleeding, which is thought to be due to fibrinolysis. Since aminocaproic acid is not systemically absorbed after bladder instillation, intravesical administration causes few side effects and does not necessitate screening patients for disseminated intravascular coagulation prior to treatment.

Aged↗