Biomedical subjects

R Kavalar

Publications and source records attributed to R Kavalar.

4 recordsLinked to original sources

PubMed2001

Expression of MAGE tumour-associated antigens is inversely correlated with tumour differentiation in invasive ductal breast cancers: an immunohistochemical study.

MAGE (Melanoma antigen E) family gene products encompass tumour-associated antigens (TAAs) recognised by human leukocyte antigen (HLA)-restricted specific T-cells. Agents inducing DNA demethylation, an event typically detectable in cellular de-differentiation processes, were shown to induce the expression of MAGE genes. By using a monoclonal antibody specific for MAGE family gene products, we have studied the expression of these TAAs in a group of 144 patients with invasive ductal breast cancers. Immunohistochemical data were correlated with tumour differentiation, lymphatic vessel invasion, oestrogen receptor expression, intratumoural necrosis, lymphocytic infiltration, perineural invasion, tumour microcalcifications and axillary lymph node metastases. MAGE immunoreactivity was undetectable in non-neoplastic cells. In poorly differentiated cancers positive staining was observed in 30/63 cases (47.6%) as compared with 13/51 (25.4%) and 5/30 (16.6%) in moderately and well-differentiated tumours, respectively (P<0.05). In addition, MAGE immunoreactivity was significantly correlated with lymphatic vessel invasion and intratumoural necrosis. Moreover, a significant inverse relationship with oestrogen receptor expression was also observed. However, no significant correlation could be established between MAGE immunoreactivity and defined phenotypic characteristics of tumour infiltrating lymphocytes, including expression of CD3, CD4, CD8, CD20 or granzyme B. Thus, expression of MAGE family gene products in invasive ductal breast cancers appears to be associated with poorly differentiated histological phenotypes. These data support the concept of specific immunotherapy in highly aggressive forms of breast neoplasms. Furthermore, they suggest that MAGE immunoreactivity could represent a tumour marker of potential prognostic relevance.

Antibodies, Monoclonal↗

PubMed2000

Primary breast cancer of the vulva: a case report and review of the literature.

Since 1872, 40 cases of ectopic mammary gland tissue in the vulva have been reported in the literature. Out of these, 12 had a primary cancer in the ectopic breast tissue. Seven metastases of an orthotopic breast cancer have been found in this location. We are presenting the 20th case of cancerous breast tissue in the vulva whom we classified as the 13th case of primary cancer based on clinical and histopathological criteria of primary and metastatic malignant disease. Because of the advanced age of the patient, wide local excision followed by adjuvant hormonal therapy was opted for. Nineteen months after surgery, there is no evidence of recurrent disease. Due to the rarity of this entity, its management presents therapeutic dilemmas, and variable treatment strategies are being found in the literature. In our opinion, the same basic principles used for treatment of cancers of the orthotopic breast should be applied in ectopic breast carcinoma.

Aged↗

PubMed1999

Pelvic actinomycosis.

Pelvic actinomycosis is a rare chronic infection caused by bacteria of the family Actinomycetaceae. Prolonged use of an intrauterine contraceptive device (IUD) is a well known risk factor. We report six patients with pelvic actinomycosis, all of whom had an IUD inserted for over six years. Diagnostic problems necessitated a laparotomy in all patients. The pathohistological diagnosis was based on the characteristic microscopic image and specific staining. The patients were treated with penicillin and amoxycillin for several months.

Actinomycosis↗

PubMed1998

Brown tumor in association with secondary hyperparathyroidism. A case report and review of the literature.

Since 1993, our 34-year-old female patient was on replacement treatment with hemodialysis for terminal renal failure due to hypertensive nephropathy. She developed severe secondary hyperparathyroidism. In 1996, she presented with a brown tumor, localized in the region of the left maxillary sinus and at its front. The patient did not take phosphate binders and treatment with vitamin D was not possible due to the increased Ca x P product. She had no difficulties, so she did not desire a surgical parathyroidectomy. As she had trouble breathing through the nose, and because of the facial deformity due to the brown tumor, she decided to have the tumor removed surgically.

Adult↗