P-glycoprotein expression as a predictor of response to neoadjuvant chemotherapy in breast cancer.

BACKGROUND: Chemoresistance is an important factor determining the response of tumor to neoadjuvant chemotherapy (NACT). P-glycoprotein (P-gp) expression-mediated drug efflux is one of the mechanisms responsible for multi-drug resistance. Our study was aimed to determine the role of P-gp expression as a predictor of response to NACT in locally advanced breast cancer (LABC) patients. MATERIALS AND METHODS: P-gp expression was performed by real-time quantitative polymerase chain reaction [qRT-PCR] in 76 patients with LABC. Response to adriamycin-based regimen was assessed both clinically and with contrast enhanced computed tomography (CECT) scan before and after NACT. The significance of correlation between tumor and P-gp levels was determined with Chi-square test. RESULTS: Twenty-one had high and 55 had low P-gp expression. On analyzing P-gp expression with response by World Health Organization (WHO) criteria, statistical significance was obtained (P = 0.038). Similarly, assessment of P-gp expression with response by Response Evaluation in Solid Tumors (RECIST) criteria in 48 patients showed statistical significance (P = 0.0005). CONCLUSION: This study proves that P-gp expression is a determinant factor in predicting response to NACT. Finally, detection of P-gp expression status before initiation of chemotherapy can be used as a predictive marker for NACT response and will also aid in avoiding the toxic side effects of NACT in non-responders.

Comprehensive decongestive therapy in postmastectomy lymphedema: An Indian perspective.

Background: Lymphedema following breast cancer treatment is one of the most morbid conditions affecting breast cancer survivors. Currently, no therapy completely cures this condition. Comprehensive Decongestive Therapy (CDT), a novel physiotherapeutic method offers promising results in managing this condition. This therapy is being widely used in the West. Till date, there are no studies evaluating the effectiveness and feasibility of this therapy in the east. Materials and Methods: The therapeutic responses of 25 patients with postmastectomy lymphedema were analyzed prospectively in this study. Each patient received an intensive phase of therapy for eight days from trained physiotherapists, which included manual lymphatic drainage, multi layered compression bandaging, exercises, and skin care. Instruction in self management techniques were given to the patients on completion of intensive therapy. The patients were followed up for three months. Changes in the volume of the edematous limb were assessed with a geometric approximation derived from serial circumference measurements of the limb and by water displacement volumetry. Changes in skin and sub cutis thickness were assessed using high frequency ultrasound. Results: The reduction in limb volume observed after therapy was 32.3% and 42% of the excess, by measurement and volumetry, respectively. The maximum reduction was obtained after the intensive phase. The reduction in skin and subcutis thickness of the edematous limb followed the same pattern as volume reduction. Patients could maintain the reduction obtained by strictly following the protocols of the maintenance phase. Conclusions: CDT combined with long-term self management is effective in treating post mastectomy lymphedema. The tropical climate is a major factor limiting the regular use of bandages by the patients.

Tamoxifen use and gallstone formation in postmenopausal breast cancer patients in south Indian population.

BACKGROUND: Tamoxifen is being used in patients with estrogen receptor positive breast cancer as an adjuvant or palliative hormonal therapy. w0 estern studies have found a 30% incidence of gallstones in patients who are taking Tamoxifen and they have proved a significant association between the two. OBJECTIVES : The objective of the study was to find out the association of Tamoxifen use and gallstone formation in postmenopausal breast cancer patients in a South Indian population. METHODS: Ninety patients who had undergone surgery for invasive breast cancer in our institute, and were receiving adjuvant Tamoxifen, were recruited for the study. An equal number of age-matched postmenopausal women were taken as controls. All of them underwent an abdominal ultrasound screening test for gallstones. Presence or absence of gallstones was noted down from their ultrasound scan reports. Pretreatment status of the gall bladder was assessed from the preoperative scan reports. RESULTS: An odds ratio of 1 was derived when the case group was compared with the control group. CONCLUSIONS: In our study we could not establish that an association existed between Tamoxifen use and gallstone formation in postmenopausal South Indian women.

Effect of early enteral feeding after upper gastrointestinal surgery.

BACKGROUND AND AIMS: The impact of early enteral nutrition in elective upper gastrointestinal surgery was the focus of this study, with particular reference to its feasibility and benefits. METHOD: This prospective study was carried out over 2 years. The study group included 30 patients and the control group had 31patients. Twenty-two patients in each group underwent truncal vagotomy and gastrojejunostomy for chronic duodenal ulcer and gastric outlet obstruction. Eight patients in the study group and nine in the control group underwent gastrectomy for carcinoma stomach. A standard milk-based diet was initiated 12 hours after surgery through a nasojejunal tube. The patients were monitored for side effects of enteral feeding and postoperative infective complications. Nitrogen balance and nutritional parameters like the body weight, serum albumin, and serum transferrin were measured pre and postoperatively. RESULTS: The groups were comparable with respect to age, sex, and preoperative nutritional factors like body weight, serum albumin, and serum transferrin. The return of bowel sounds and passage of flatus took place significantly earlier in the study group (1.43 vs. 2.81 days). Diarrhoea and abdominal cramps were the significant complications noted in the study group in relation to early enteral feeding. No patient required withdrawal of enteral feeds. They showed a positive nitrogen balance on the fourth postoperative day. The patients in the study group showed significant increase in the serum transferrin level compared with the preoperative level but the serum albumin level was not significantly altered. CONCLUSION: Early enteral feeding through the nasojejunal tube following elective upper gastrointestinal surgery is feasible, safe and improves the nutritional status.

Feasibility of breast conservation surgery in locally advanced breast cancer downstaged by neoadjuvant chemotherapy: a study in mastectomy specimens using simulation lumpectomy.

BACKGROUND: The response of locally advanced breast cancer (LABC) to neoadjuvant chemotherapy (NACT) offers these patients previously treated by mastectomy, the chance for breast conservation. AIM: This study aims to assess the feasibility of lumpectomy in patients with LABC treated by NACT, with residual tumor < or =5 cm. SETTINGS, DESIGN: Single group prospective study from August 2001 to June 2003 in a teaching hospital. MATERIALS AND METHODS: Thirty patients with LABC whose tumors reduced with NACT to 5 cm were included. Simulation lumpectomy was performed on the mastectomy specimens to achieve 1 to 2 cm clearance from tumor and hence margin negativity. Multiple sections of the inked margin were studied. STATISTICAL ANALYSIS: Margin positivity was correlated with patient factors. Chi square test and Fisher's exact test used as appropriate. P value 0.05 was considered significant. RESULTS AND CONCLUSIONS: After three cycles of NACT, 4 patients (13%) had complete clinical response including 2 with complete pathological response. Twenty-two (73%) showed partial response and 4, no response. Fourteen out of thirty (47%) had tumor involvement of margins. Tumors with post-chemotherapy size> 4 cm were margin positive in 10/13 (77%). Tumors with post-chemotherapy size>3 cm were margin positive in 13/24 (54%). Tumors with post-chemotherapy size 3 cm were margin negative in 5/6 (83%). Pre-chemotherapy tumor size and post-chemotherapy tumor size were significantly associated with margin positivity (P=0.003). Tumors in the subareolar location had significantly higher incidence of residual tumor in the nipple areola complex. (P=0.04). Margin positivity of lumpectomy on downstaged tumors can be reduced by removing the nipple areola complex in subareolar tumors and by limiting breast conservation to tumors with post-chemotherapy size < or =3 cm.

Postoperative intussusception in the adult: a case report.

We report the case of a 40-year-old man who presented with a history of sudden onset abdominal pain and obstipation of 1 day's duration. During laparatomy, a 5mm perforation was seen in the anterior wall of the first part of the duodenum, which was closed by a Graham patch and the abdomen was closed after peritoneal lavage. Postoperatively, the patient's condition worsened and he was posted for a laparatomy with a diagnosis of postoperative obstruction. During the laparatomy, an ileocolic was seen which could be easily reduced. After the second surgery, the patient made an uneventful recover.

Complete axillary conversion after neoadjuvant chemotherapy in locally advanced breast cancer: a step towards conserving axilla?

OBJECTIVES: This study was designed to assess the clinical, sonographic and histopathological response of axillary lymph node metastasis to neoadjuvant chemotherapy in patients with locally advanced breast cancer. MATERIAL AND METHODS: Forty patients with locally advanced breast cancer (LABC) with clinically palpable or sonographically detectable axillary nodes were studied. FNAC of the primary tumor and axillary nodes was done and patients were started on neoadjuvant chemotherapy. Axillary nodes were assessed clinically and sonographically for response after 3 cycles of chemotherapy. All patients underwent total mastectomy with axillary clearance and the lymph nodes in the specimen were examined for metastasis. RESULTS: 47% patients had complete clinical nodal response, while 19% showed complete sonographic response. Complete pathological nodal response was documented in 22% of patients. Ultrasonography was found to be more sensitive than clinical examination in assessing complete nodal response. 10% of the patients had complete pathological response of both primary tumor and axillary nodes. There was significant correlation between pathological response of primary tumor and lymph nodes (P=0.004). Patients with complete sonographic or clinical response were found to have no or minimal residual disease in axilla and hence axillary dissection may be avoided in them.