Biomedical subjects

T Asaga

Publications and source records attributed to T Asaga.

23 records · Page 2Linked to original sources

PubMed1987

Breast imaging: dual-energy projection radiography with digital radiography.

Dual-energy projection radiography was applied to breast examinations. To perform the dual-energy subtraction radiography with use of a digital radiography unit, high- and low-energy projections were made at an appropriate time interval under differing x-ray exposure conditions. Dual-energy projection radiography appears to offer clear, detailed images and may be a useful supplement to standard mammography.

Breast Neoplasms↗

PubMed1985

[Studies on cases of resection of cardiac carcinoma].

We studied 53 cases of cardiac carcinoma resected at our hospital during the past 15 years. The five-year survival rate of patients undergoing curative resection was 62.5%. But that of esophagocardiac carcinoma died due to recurrence after the curative resection. In such cases, recurrence was often observed in the thoracic cavity, especially in those who survived more than two years postoperatively. Therefore, in surgery for esophagocardiac carcinoma, sufficient mediastinal lymph node removal is necessary.

Adult↗

PubMed1983

Difference in polynucleation of cultured cells from human mammary tumors and normal mammary glands on treatment with cytochalasin B.

In order to study the biological nature of various mammary tumors, differences in the formation of polynuclear cells after the administration of cytochalasin B were investigated in cultures of human mammary tumors and normal mammary gland. When cytochalasin B was applied to the cultures, polynuclear cells increased in all cancer cases (6.1% on average), but relatively little effect was seen in cases of benign tumors and normal mammary gland (less than 1.1% on average). From these results, it appears that the difference in polynucleation on treatment with cytochalasin B may be useful as a biological means to distinguish human malignant and benign mammary tumors.

Breast↗

PubMed1982

Short-term cultivation of human mammary tumors and normal mammary glands in medium containing human colostrum milk.

A short-term cultivation of human mammary tumors and normal mammary glands was attempted in order to establish a reproducible method for their cultivation. Epithelial cells could be cultivated consistently by the use of collagenase for tissue dissociation and the addition of insulin, human colostrum milk and cholera toxin to the culture medium. Human colostrum milk seemed to be a good additive for the growth of mammary epithelial cells but not for that of fibroblastic cells.

Breast↗

PubMedDate not supplied

Evaluation of small internal mammary lymph node metastases in breast cancer by MRI.

PURPOSE: In breast cancer, diagnosis of a small internal mammary lymph node (IMLN) metastasis of less than 10 mm in size has been difficult. Our purpose was to retrospectively evaluate MRI findings of small IMLN metastases in comparison with dissected IMLNs. METHODS: We studied 43 dissected IMLNs (range 2-12 mm, mean 4.512+/-2.763 mm) in 16 women with breast cancer (15 primary, and 1 recurrent). MRI examinations were performed using a 1.5 Tesla scanner (200FX; Toshiba, Tokyo, Japan) to obtain noncontrast T1-weighted SE images (TR/TE; 500/15 or 400/15ms), with a slice thickness of 5 mm on coronal images, 10 mm or 7 mm on sagittal images, FOV 15x15 cm, matrix 256x256, using a surface coil with patients in the supine position. MR images were evaluated regarding the major diameter and shape and margin of each node. RESULTS: Regarding the presence of IMLN metastases, there was a significant difference between nodes with a major diameter of 5 mm or more and those of less than 5 mm (p<0.05). Using the size-based criterion (defining< or =5 mm as positive), MRI had 90.7% accuracy, 93.3% sensitivity, and 89.3% specificity. There were no significant differences in the shape-or margin-based criterion. CONCLUSIONS: MRI was useful in diagnosing small IMLN metastases, using a size-based criterion.

Adult↗