Biomedical subjects

M Noguchi

Publications and source records attributed to M Noguchi.

At least 865 records · Page 48Linked to original sources

PubMedDate not supplied

Increased iodine-123-iodoamphetamine uptake in hepatomas.

In the current study, two cases of hepatoma are reported in which N-isopropyl-(I-123)-p-iodoamphetamine (IMP) liver scan demonstrated increased accumulation in the tumor corresponding to the areas enhanced on contrast enhanced CT (CE-CT). In contrast, there was no IMP accumulation in the necrotic area of the tumor in which no enhancement was found on CE-CT. Thus, IMP liver scan seems to have the potential to assess the viability of a hepatoma as well as to detect and localize it.

Amphetamines↗

PubMedDate not supplied

Breast cancer and regional lymph node dissections.

Regional lymph node metastases were evaluated in 289 patients with operable breast cancer. The metastases of the axillary and internal mammary lymph node were shown to be closely related to the survival of patients, but the status of these nodes was shown to be impossible to estimate before the operation. Thus, axillary and internal mammary node dissections seem to be very important in order to attain an acceptable amount of information for staging of certain breast cancer patients. Due to the radicality of operations including internal mammary node dissection, the use of modified extended mastectomy is proposed as the staging operation. In this manner, the anterior chest deformity created by an extended radical mastectomy can be avoided and the pectoralis major muscle spared in patients without internal mammary lymph node involvement. Also found in this study, was some evidence of the beneficial use of en bloc extended radical mastectomy for the survival of a selected group of patients.

Adult↗

PubMedDate not supplied

The surgical management of parasternal recurrence of breast cancer.

Although parasternal recurrence of breast cancer can be adequately controlled by radiation therapy, at times, surgical excision is more effective. In this paper, a new technique for the radical resection of the parasternal portion of the chest wall, including dissection of the internal mammary and supraclavicular lymph nodes, is proposed. Between 1977 and 1984, eleven patients with parasternal recurrence were treated in our department. Five of these cases underwent this kind of operation and four of them are still alive without further recurrence; the remaining patient developed skin metastasis postoperatively. One patient refused radiation therapy but, in any case, radiation therapy failed to control the parasternal recurrences in the other five patients. This new operation is a rational and effective mode of treatment for parasternal recurrence.

Adenocarcinoma↗

PubMedDate not supplied

Clinical applications of Ga-67 DFO-DAS-fibrinogen.

As a result of our preliminary study which confirmed the safety and promising clinical usefulness of 67Ga-DFO-DAS-fibrinogen, scintigrams were taken on seven patients with suspected thrombosis. No evidence of radioactivity accumulation was found in the sites of suspected thrombi. However, in one patient accumulation of 67Ga-fibrinogen was observed in thrombi localized in the obstructed internal shunt for hemodialysis. A photon-deficient area corresponding to a gigantic thrombus in the left atrium was seen in an early 67Ga-fibrinogen image in a patient with mitral stenosis. Accumulation of radioactivity in the atrial thrombus was not observed in a later image. The necessity of performing 67Ga-fibrinogen scintigraphy in the acute phase of thrombus formation is discussed. The promising usefulness of 67Ga-fibrinogen for the early detection of thrombus formation in internal shunts for hemodialysis is also emphasized.

Adult↗

PubMedDate not supplied

The modified extended mastectomy using the trap-door method as a staging operation.

The choice of operation for breast cancer must be directed towards giving the best chance of local control of the disease. Extended radical mastectomy may be beneficial for patients with internal mammary lymph node metastases, although it has remained controversial. The anterior chest defect created by extended radical mastectomy should be avoided in patients with no metastasis in the internal mammary lymph nodes. This paper, proposes a new technique of modified extended mastectomy using the trap-door method as a staging operation and an intermediate operation between modified radical mastectomy and extended radical mastectomy. In this operation, the axillary dissection could be performed by reflecting the pectoralis major muscle and the internal mammary lymph nodes could be dissected by reflecting the parasternal chest wall in trap-door fashion. In cases in which the metastasis is histologically found in the internal mammary content, extended radical mastectomy by sternal splitting is preferred.

Breast Neoplasms↗

PubMedDate not supplied

Regional lymph node metastases in well-differentiated thyroid carcinoma.

The status of regional lymph node metastases was assessed in 171 patients with thyroid cancer who underwent a variety of thyroidectomy procedures with regional lymph node dissection at Kanazawa University, from January 1979 to March 1986. The rates of regional lymph node metastasis in minimal and ordinary thyroid cancer were 57% and 84% respectively. Since the rates of lymph node metastasis were high not only in the central cervical compartment but also in the lateral jugular compartment, modified radical neck dissection in the ipsilateral neck is at least recommended in patients with these thyroid cancers. Furthermore, high frequencies of bilateral regional lymph node metastases were found in patients with obviously widespread involvement of the bilateral lobes, with cancer located in the isthmus, with clinically detectable bilateral or contralateral jugular lymph node metastases and with histological involvement in the contralateral paratracheal lymph nodes. Bilateral modified radical neck dissection is recommended in these patients.

Adenocarcinoma↗

PubMedDate not supplied

Appraisal of a newly developed self-collection device for obtaining cervical specimens.

The Kato self-collection method of obtaining cervical samples was used on 150 subjects who also had physician-prepared scrape smears performed for a comparative study of the cytodiagnostic results. Comparison of the cytologies on the two types of specimens showed total agreement as to whether a case was positive or negative; the only disagreements were in the degree of severity of some of the positive cases. If the apparatus is improved further, the Kato self-collection system may become useful for mass screening, particularly in medically remote or rural areas.

Ambulatory Care Facilities↗

PubMedDate not supplied

Differential (Ha-, K- and N-) ras p21 expression in benign and malignant human thyroid tumors: an immunohistochemical study.

An immunohistochemical study of 24 thyroid carcinomas, 10 thyroid adenomas and 10 normal thyroids was performed using monoclonal antibodies directed against each of the three members of ras p21s; Ha-, K- and N-ras p21. Normal thyroids showed a negative staining for all of the three ras p21s. The expressional levels of the three ras p21s were various in each benign and malignant thyroid tumor, but a higher expression of Ha- and N-ras p21 and a lower or negative expression of K-ras p21 was a common finding in thyroid tumors of all histologic categories. There were no correlations between the expressional levels of ras p21s and the histologic subtypes, tumor size or lymph node status in the thyroid carcinomas.

Adenocarcinoma, Follicular↗

PubMedDate not supplied

Inhibitory effects of purified eicosapentaenoic acid and docosahexaenoic acid on growth and metastasis of murine transplantable mammary tumor.

We studied the effects of purified linoleic acid, eicosapentaenoic acid(EPA) and docosahexaenoic acid (DHA) on mammary tumor MM48 the transplanted into C3H/He mice. The growth of the primary tumor was significantly inhibited in EPA- and DHA-treated groups as compared with control and/or linoleic acid-treated groups (p < 0.05). The number of metastatic tumors in the lungs tended to be inhibited in the EPA- and DHA-treated groups and promoted in the linoleic acid-treated group, as compared with the control group, but not to a statistically significant extent. The EPA-treated group survived significantly longer than the control group (p = 0.002), while the DHA-treated group survived longer than the control group although the difference was not significant (p = 0.070). However, there was no significant difference between EPA- and DHA-treated groups on primary tumor growth, number of lung metastases or survival time of animals.

Adenocarcinoma↗

PubMedDate not supplied

Breast conserving surgery and radiation in the treatment of operable breast cancer.

Breast conserving treatment (BCT) is an alternative to mastectomy, and prospective randomized trials have demonstrated that BCT and radical mastectomy result in similar actuarial survival rates. BCT should fulfil two criteria: (1) it should afford the same local control of disease as radical mastectomy, and (2) it should offer clear cosmetic and psychological advantages. This paper reviews the current status of BCT in the treatment of breast cancer. The choice of a narrow marginal tumor excision with aggressive radiation versus a wide resection with a small dose of radiation is discussed. Although the narrower marginal excisions, such as tumorectomy or lumpectomy provide the best cosmetic results, they may not provide adequate local control even when combined with aggressive irradiation. Wide resections such as quadrantectomy combined with a smaller dose of radiation, results in adequate local control, but less satisfactory cosmetic results. Although body image is better preserved by BCT, a clear enhancement of the psychological well being has yet to be established. Nevertheless, with further improvement in surgical, radiological and chemotherapeutic techniques, BCT likely will be the treatment of choice in more and more patients with operable breast cancer.

Breast Neoplasms↗

PubMedDate not supplied

Immunohistochemical demonstration of thyroid peroxidase (TPO) in human thyroid tissues from various thyroid diseases.

Human thyroid peroxidase (hTPO) was detected immunohistochemically in 61 normal, benign and malignant thyroid tissues with a monoclonal antibody (38E) against hTPO using paraffin-embedded sections. Thyroid peroxidase was expressed intensely not only in tissues from Graves disease and hyperfunctioning adenomas, but also in those from carcinomas, adenomas and Hashimoto's thyroiditis. The staining pattern of TPO in the follicular cells was a diffuse and fine granular one in the normal thyroids, Graves' thyroids and adenomas, but abnormal coarse granular deposits of TPO were characteristically identified in most of the papillary carcinomas and Hashimoto's thyroiditis. These coarse granular deposits of TPO suggested that qualitative or structural changes in the TPO molecule are present in carcinomas and Hashimoto's thyroiditis. Consequently, these qualitative changes in TPO may be responsible for the lack of biochemically measured TPO activity in these diseases. This finding may also be useful in distinguishing between benign and malignant thyroid tumors.

Humans↗

PubMedDate not supplied

Tumor proliferation-related markers in papillary thyroid carcinomas: correlation with histologic subtypes.

Four sorts of tumor proliferation-related markers were studied in 50 papillary carcinomas of the thyroid, and the results were correlated with the histologic subtypes of papillary thyroid carcinoma, which have been shown to be associated with the prognosis of the disease. The mitotic count analyzed by light microscopy, the proliferating cell nuclear antigen (PCNA) and the epidermal growth factor (EGF) expressions by immunohistochemical analysis, and the ploidy status analyzed by DNA flow cytometry were used as the proliferation-related markers in this study. The presence of mitoses, high PCNA score and DNA aneuploidy did not correlate with the histologic subtypes, patient age, sex or the tumor extent. Only EGF expression was significantly correlated with the histologic subtypes. This finding suggests that EGF expression may be the most reliable marker to predict the prognosis of papillary carcinoma of the thyroid.

Adult↗

PubMedDate not supplied

The diagnosis of internal mammary node metastases of breast cancer.

It is important to know the status of internal mammary lymph node (IMN) in estimating the prognosis in patients with breast cancer and/or planning the treatment. In the first series of this study, the diagnostic value of internal mammary lymphoscintigraphy (IMLS) and that of parasternal sonography (PS) were evaluated in 57 patients. The overall diagnostic accuracy of IMLS was 72% and that of PS, 84%, compared with IMN metastases confirmed on a biopsy. In the second series, 23 patients who underwent extended radical mastectomy and were found to have IMN metastases, were examined for the sizes and locations of metastatic IMN. Minute metastatic lymph nodes not detectable by IMLS or PS were found in 9 (39%) of the patients. However, the incidence of metastases to the first and/or second intercostal spaces was 97% for the patients. We concluded that a biopsy of the first and second intercostal spaces is useful in providing the information of IMN status.

Adult↗

PubMedDate not supplied

Multivariate study of prognostic factors for differentiated thyroid carcinoma: the significance of histologic subtype.

We re-examined 239 patients with differentiated thyroid carcinoma (222 with papillary carcinoma and 17 with follicular carcinoma) especially for the clinico-pathologic entity of poorly differentiated carcinoma, and made univariate and multivariate analyses of the results to evaluate whether it would be of value in estimating the prognosis in thyroid cancer patients. In the univariate study, no significant difference was found in either survival and disease-free survival between papillary and follicular carcinomas, but between well differentiated and poorly differentiated carcinomas. In the multivariate study, however, the presence of poorly differentiated carcinoma did not appear to be an unfavorable prognostic factor. The sex, tumor size, and presence of distant metastases or grossly malignant residue in the neck after operation were, on the other hand, confirmed by the analyses to be important prognostic factors. We concluded that histologic subclassification may be less useful in estimating the prognosis in patients with differentiated thyroid carcinoma than other factors such as sex and the extent of the tumor.

Adenocarcinoma↗

PubMedDate not supplied

Influences of high dietary fat and/or indomethacin on tumor proliferation and cell kinetics of 7,12-dimethylbenz(a)anthracene-induced mammary carcinomas in rats.

We investigated the effects of a high-fat diet and indomethacin on tumorigenesis, tumor proliferation and cell kinetics of 7,12-Dimethylbenz(a)anthracene (DMBA)--induced mammary carcinomas in Sprague-Dawley (SD) rats. Both the high-fat diet and indomethacin significantly stimulated tumor proliferation and cell kinetics, whereas tumorigenesis was significantly stimulated by the high-fat diet but it was significantly inhibited by indomethacin. Moreover, switching the animals from the high-fat diet with or without indomethacin to the low-fat diet suppressed tumor proliferation and cell kinetics. It can therefore be concluded that either a high-fat diet or indomethacin stimulates tumor proliferation in DMBA--induced mammary carcinoma in SD rats.

9,10-Dimethyl-1,2-benzanthracene↗

PubMedDate not supplied

Recurrence and mortality in patients with differentiated thyroid carcinoma.

We examined the factors associated with increased recurrence and/or mortality of 195 patients with primary differentiated thyroid carcinoma. Of 171 patients who underwent at least, resection of the primary macroscopic tumor (curable), 26 patients (15%) developed recurrence and 6 of these patients died from the disease. Sixteen (67%) of 24 patients with initial distant metastasis or grossly malignant tumor residua in the neck after the operation (non-curable patients) died from the disease. In the curable patients, age, sex and tumor size correlated significantly with recurrence and/or mortality. When the characteristics of patients who died after recurrence were compared to those who survived after recurrence, however, only the patient's age correlated significantly with mortality. In the non-curable patients, the histologic subtype correlated significantly with mortality. It may be concluded, therefore, that the risk factors which affect mortality in differentiated thyroid cancer differ between curable and non-curable patients.

Adenocarcinoma, Follicular↗

PubMedDate not supplied

N-myc protein expression in human breast carcinoma: prognostic implications.

The overexpression of N-myc gene and its protein products has been thought to be limited to cases of neuroblastoma, retinoblastoma and small cell lung carcinoma, but there is increasing evidence of its wider distribution in human tumors. This study showed that the protein of N-myc gene is associated in normal, benign and malignant human breast tissues. We found that N-myc oncoprotein is overexpressed in most breast carcinomas and that N-myc overexpression is significantly correlated with clinical stage, and histological grading of the tumors, and, more importantly with the clinical outcome of the patients. Analysis of DNA, mRNA and protein levels suggested that the high N-myc expression in breast cancer occurs without concomitant gene amplification. The finding of a direct inverse correlation between N-myc overexpression and the prognosis of patients with breast carcinoma suggests that N-myc expression may be useful as a prognostic factor in human breast cancer.

Breast Neoplasms↗

PubMedDate not supplied

Controversies in the surgical management of differentiated thyroid carcinoma.

We reviewed the literature related to the surgical management of differentiated thyroid carcinoma (DTC), and examined ongoing controversies regarding treatment. DTC has a relatively indolent biologic behavior, but it tends to spread to the thyroid and/or regional lymph nodes even in the early stages of the disease. On the other hand, surgical resection is the most effective treatment for DTC, but the extent of surgical resection has been controversial. The impact of surgery has been considered to be only minor in the prognosis of the majority of patients, unless grossly malignant residue is left behind. Nevertheless, in some patients the disease follows an aggressive course culminating in death. For such high-risk patients, a more extensive operation should be performed. Therefore, it may be concluded that the extent of surgical resection should depend on the basis of the biologic behavior of the DTC rather than the extent of cancer involvement in the thyroid and regional lymph nodes.

Adenocarcinoma, Follicular↗