Biomedical subjects
Publications and source records attributed to J Kulka.
Rat stomachs were studied after intragastrically administered, repeated doses of 0.1 N HCl, 100 mmol/l NaF, 50 mmol/l CaF2 in 0.1 N HCl, respectively. NaF produced extensive desquamation and cell injury, while CaF2 caused some desquamation and a slight decrease in secretory activity as revealed by light microscopic, SEM and TEM examinations.
Explore the source record for details and available documents.
BACKGROUND: The association of TN expression, tumour grading and expression of commonly used histopathologic prognostic factors (p53 and estrogen receptor) was examined in 62 cases of invasive ductal carcinoma of the breast. MATERIAL AND METHODS: Following histological grading immunohistochemical reactions were undertaken on routine histopathologic samples and the results semiquantitatively evaluated. RESULTS: Strong TN expression was found in close proximity of the neoplastic epithelial cells in each case, but not in other areas of the stroma. In 10 (16%) cases TN expression was detected to the neoplastic epithelial cells as well. There was no statistically significant difference in the extent of stromal TN immunoreaction between tumours of different grades. A significant difference was found in p53 and estrogen receptor immunoreactions by tumour grade (p = 0.05). TN immunoreaction in the stroma did not correlate with the nuclear expression of p53, Ki-67 and estrogen receptor in the tumour cells. CONCLUSIONS: TN immunoreactivity does not seem to correlate with currently used prognostic factors. The increased expression of stromal TN in invasive breast ductal carcinomas is an other indicator of possible role played by the extracelular matrix components in cancer development.
BACKGROUND: PST of locally advanced breast carcinomas causes tumour shrinkage and down-staging, therefore, optimal circumstances for surgery. PATIENTS AND METHODS: We treated 25 stage IIIA-IIIB breast cancer patients with PST (Doxorubicin/Docetaxel). Histological diagnosis (core biopsy) was available in each case. Tumour regression and cardiac function were recorded regularly. RESULTS: Five patients showed complete pathological remission. Instead of 19 mastectomies, only nine were performed and 16 patients underwent breast-conserving therapy. CONCLUSION: Using PST breast conservation rate is improved.
Complex sclerosing lesions have presented a diagnostic problem since they were identified amongst benign breast lesions. Their differentiation from stellate carcinomas may cause serious difficulties for both radiologists and pathologists. In the present study the conventional and thick-slice appearances of 15 complex sclerosing lesions and 15 well differentiated and tubular carcinomas were compared, with the main emphasis on the stellate zone of the lesions. There was a marked morphological difference between the stellate extensions: the majority was formed by epithelial structures in complex sclerosing lesions as opposed to the composition of the extensions of the stellate carcinomas, where fibrovascular tissue dominates. Well differentiated carcinomas originating in complex sclerosing lesions showed an intermediate ratio of epithelial and fibrous stellate extensions. The structural differences may explain the radiomorphological differences of benign and malignant stellate breast lesions. We suggest these structural characteristics ought to be included in the pathomorphologic differential diagnostic features.
Multimodal methods of three-dimensional (3-D) imaging of breast cancer are described. These involve scanning confocal microscopy, using 50 MHz acoustic or near-infrared images, four-view (tetrahedral) radiography and x-ray projection microscopy. Computerised volume data from these techniques can be used to produce three-dimensional images of tissue ranging from 500 microns to approximately 4 mm in thickness. Preliminary findings indicate that stereoscopic images or 3-D computerised reconstructions are capable of advancing the understanding of the structure of ductal carcinoma in situ, lesions simulating microinvasive breast carcinoma, surgical clearance of high-grade calcifying ductal carcinoma in situ, and the 3-D growth patterns of invasive forms of breast carcinoma. In the future computerised image fusion techniques seem likely to be able to take advantage of multimodal imaging of breast cancers, thus correcting primary imaging artefacts, improving robustness, and combining complementary information. In addition, the use of computerised tetrahedral radiography may change the intraoperative assessment of breast cancers, which mostly depend at present upon subsequent laboratory procedures that take days to perform.