Biomedical subjects

K J Manahan

Publications and source records attributed to K J Manahan.

4 recordsLinked to original sources

PubMed2001

Clonal heterogeneity of p53 mutations in ovarian cancer.

We analyzed clonal populations of ovarian cancer cells for heterogeneity in p53 mutations (exons 4-9) and chemosensitivity. UL-3A cells were developed from a patient with stage IIIC ovarian adenocarcinoma. Heterogeneity in p53 mutations was demonstrated, ranging from point mutations to deletions in exons 4, 6 and 7. UL-3A cells contained two point mutations, in codon 248 of exon 7 and in codon 76 of exon 4. Five groups of clones were identified according to the p53 mutations. UL-3A clones with low p53 levels were more sensitive to CDDP (LD50 <8.0 microg/ml). Heterogeneity of p53 mutations may provide growth advantage during disease progression or chemotherapy.

Antineoplastic Agents↗

PubMed1999

Loop electrosurgical excision procedure for partial upper vaginectomy.

OBJECTIVES: Partial upper vaginectomy consists of removal of the vaginal apex and is indicated for the diagnosis and treatment of vaginal intraepithelial neoplasia and recurrent cancer. We present a novel surgical approach to partial upper vaginectomy by use of the loop electrosurgical excision procedure. STUDY DESIGN: A total of 15 consecutive patients with abnormal vaginal cytologic results were treated by the loop electrosurgical excision procedure for partial upper vaginectomy. After submucosal injection of local anesthetic, the loop electrode was used to resect the upper third of the vagina. An iodoform vaginal pack was placed for 24 hours. All patients with high-grade vaginal intraepithelial neoplasia received intravaginal 5-fluorouracil cream postoperatively. RESULTS: The mean blood loss was 0 mL, and the mean surgical time was 30 minutes. A complication developed in 1 patient (7%). One case of invasive carcinoma was diagnosed. No recurrences have developed in any patients with vaginal intraepithelial neoplasia after hysterectomy. CONCLUSIONS: The loop electrosurgical excision procedure for partial upper vaginectomy can be performed quickly, with minimal blood loss, minimal complications, and minimal recurrence of neoplasia, and it provides a histologic specimen for evaluation.

Adult↗

PubMed1999

Peritoneal fluid urea nitrogen and creatinine reference values.

OBJECTIVE: To evaluate urea nitrogen and creatinine levels in peritoneal fluid. METHODS: We prospectively evaluated 20 consecutive women having radical hysterectomy with lymphadenectomy. On postoperative days 2 and 3, serum, urine, and peritoneal fluid samples were tested for urea nitrogen and creatinine. Using power analysis we calculated an adequate sample size to be 16 patients. RESULTS: The mean urea nitrogen was 11 mg/dL in serum, 11 mg/dL in peritoneal fluid, and 469 mg/dL in urine. The mean creatinine was .9 mg/dL in serum, 1.0 mg/dL in peritoneal fluid, and 141 mg/dL in urine. Urea nitrogen and creatinine values in peritoneal fluid and serum were essentially identical. Urine urea nitrogen and creatinine values were significantly greater than serum and peritoneal values (47 to 157 times greater) (P < .011). On postoperative days 2 and 3, serial levels of serum, peritoneal fluid, and urine urea nitrogen and creatinine in the same subject showed no significant variation (P ranging from .19 to .31). CONCLUSION: Normal reference values of urea nitrogen and creatinine in peritoneal fluid are equivalent to serum values and significantly less than urine levels.

Adult↗

PubMed1997

Modified radical vulvectomy without lymphadenectomy under local anesthesia in medically compromised patients.

INTRODUCTION: Our objective was to review our experience with vulvar cancer treated with modified radical vulvectomy without lymphadenectomy under local anesthesia and sedation. METHODS: A retrospective review of surgical case lists revealed five patients who underwent modified radical vulvectomy without lymphadenectomy under local anesthesia with sedation. All patients had significant medical diseases which precluded regional or general anesthesia. Modified radical vulvectomy was performed in standard fashion under sedation and local anesthesia. Inguinal lymphadenectomy was not performed. RESULTS: Median operative time was 1.5 h and median blood loss was 100 cc. Median diameter of tissue resected was 5 cm and median depth was 5 cm. Median length of hospital stay was 4 days. No patient complained of pain during the operative procedure. At a median follow-up of 2.5 years, there has been one local recurrence. CONCLUSION: Five patients with symptomatic vulvar cancer who were not candidates for regional or general anesthesia underwent modified radical vulvectomy without lymphadenectomy under local anesthesia with sedation. The procedure was well-tolerated and produced minimal morbidity and adequate short-term local control.

Aged↗