תוצאת חיפוש

The Interaction Between Saliva and Cigarette Smoke and its Devastating Biological Effects as Related to Oral Cancer

Rafael M. Nagler, Ifat Klein, Abraham Z. Reznick

Department of Oral & Maxillofacial Surgery, Salivary Clinic and Oral Biochemistry Laboratory and Department of Anatomy and Cell Biology, Rambam Medical Center and Bruce Rappaport Faculty of Medicine, Technion - Israel Institute of Technology, Haifa, Israel

Saliva is the first body fluid to confront inhaled cigarette smoke (CS) which is injurious to the oral cavity and is associated with several oral diseases and cancer. We have recently demonstrated in an In vitro model that an exposure of saliva to nine `puffs' of CS induced a distinct increase in protein carbonyls. This elevation of protein carbonyls caused by CS may be the result of aldehydes presented in the CS reacting with sulphydryl (-SH) groups of the proteins. Moreover, following the exposure to CS, the activities of several salivary enzymes amylase, lactate dehydrogenase (LDH) and acid phosphatase (ACP) were found to be significantly reduced by 83%, 57% and 77%, respectively. However, CS had no effect on the activities of aspartate aminotransferase and alkaline phosphatase. In the current study we found that CS also reduced salivary peroxidase activity by no less than 80% which may be of a great importance to the clinical set up as peroxidase is considered a pivotal enzyme of the the salivary protecting system. Furthermore, in contrast to LDH findings in saliva, the LDH activity in plasma was not reduced following its exposure to CS.

Conclusion: Hence, we concluded that the loss of salivary enzyme activities may be due to various agents in the CS that affect the enzyme via different mechanisms.

עידו שולט

מרכז רפואי רמב"ם, הפקולטה לרפואה רפפורט, הטכניון, חיפה

אנו נוטים לקבל כמובנת מאליה את העובדה, כי קיים ייצוג המשותף לכל חושינו, למיקומם של עצמים סביב לנו ביחס לגופנו. מפה של החלל התפישתי ממוקמת אי שם במוח ומוצגת לנו על ידי ההכרה. חייבת להיות תצוגה כלשהי מסוג זה, שאם לא כן, לא היינו מסוגלים לקשר ללא כל מאמץ בין תפישת המרחב הקרוב ממקור רשתית, סטראוסקופי, שמיעתי, סומסטטי, אוקולומוטורי ותנועות גפיים. תצוגה זו לא חייבת להיות כפי שרבים מניחים, בצורת מפה טופוגרפית מפורשת תלת-מימדית, כגון המפות הרטינוטופיות, הממוקמות בקליפה העורפית. למעשה, נמצאה רק עדות מועטה ביותר לקיום מפה טופוגרפית מעין זו לחלל התפישתי.

התפיסה המקובלת היא, כי חיתוך דופן אלקטיבי אשר נעשה ללא הוריה רפואית הוא פעולה פסולה. בעשור האחרון למאה ה-20, הובעו דעות שחלקו על תפיסה זו והתעורר ויכוח לגבי מקומה של הלידה הלדנית במאה ה- 21. הוויכוח אשר זכה לתהודה תקשורתית רבה החל בבריטניה והתעורר אף בישראל, בה שיעור חיתוכי הדופן עולה בהתמדה. עפ"י הנתונים שנאספו ע"י יו"ר החוג לרפואה סב-לידתית והוצגו בכינוס השנתי האחרון (7 ביולי 2000), היה השיעור הממוצע של חיתוכי הדופן בשנת 1999 כדי 14.6% מכלל הלידות בישראל, פי שלושה מהשיעור בשנת 1977 (5.5%) ובשליש יותר לעומת השיעור חמש שנים קודם לכן (11.3%). בסקירה של בן-הרוש וחב' (בגיליון זה), נדונה השאלה של ניהול לידה פעיל בתקופתנו. לאור הוויכוח לגבי חיתוך-דופן עפ"י בקשת היולדת (cesarean section upon maternal request) נראית שאלה זו לכאורה ארכאית. לפיכך, בצד ניהול לידה פעיל, יש להכיר את הוויכוח לגבי אופייה של הלידה הלדנית במאה ה- 21.

Acute Lymphoblastic Leukemia in Adults Treated with German Multicenter Study Group Protocols

G. Goldstein, O. Shpilberg, P. Raanani, A. Chetrit, I. Ben-Bassat

Institutes of Hematology and of Clinical Epidemiology, Sheba Medical Center and Sackler Faculty of Medicine, Tel Aviv University

Acute lymphoblastic leukemia (ALL) is a malignant disease whose incidence is relatively low among adults, unlike in children. Adults with ALL have a lower rate of long-term disease-free survival. During the last 20 years, a German multicenter group has shown that their protocol have achieved good results in adult ALL.

We reviewed the medical records of 35 ALL patients, aged 19-63 years, whome we treated with these protocol (1988-1997). The remission rate was 94%. At a median follow-up of 46 months the 2-year overall survival was 54% and the disease-free survival was 94%. Although 2 patients died of bone marrow transplant complications, no death was directly associated with drug toxicity. The main grade 3 or 4 side effects (WHO classification) were neutropenia (91%), thrombocytopenia (71%) and anemia (71%).

With there protocols we achieved high overall and disease-free survival rates, especially in comparison with other reports. Despite the high rate of severe treatment toxicity, there were no fatalities directly related to treatment. These results emphasize the need to concentrate treatment of adult ALL patients in large medical centers with expertise in the use of the complicated treatment protocols required.

Secondary Bone Grafting in Cleft Lip and Palate

M. Peled, D. Aisenbud, D. Goldstein, A. Rachmiel, D. Laufer

Maxillofacial and Oral Surgery Dept. and Cleft-Palate Clinic, Rambam Medical Center; and Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa

Results of reconstruction of residual alveolar bone defects in 52 patients operated between 1990-1998 were evaluated clinically and radiographically in a retrospective study.

Ages ranged between 9-37; 30 were males. The donor site of bone grafts in all was particulate cancellous marrow from the anterior iliac crest. 32 had unilateral clefts and 20 bilateral. Total cleft sites treated was 72.

Best results were achieved when bone grafting was carried out prior to the eruption of the canine tooth. The cleft space was closed and oro-nasal fistulas were eliminated in 42 (80%). Success rates in unilateral and bilateral cases were significantly different.

High-Dose Chemotherapy and Autologous Stem Cell Trans-Plantation for Refractory and Relapsing Hodgkin's Disease

A. Avigdor, I. Hardan, O. Shpilberg, P. Raanani, I. Grotto, I. Ben-Bassat

Hematology Institute and Hemato-oncology Unit, Sheba Medical Center, Tel Hashomer and Sackler Faculty of Medicine, Tel Aviv University

High dose chemotherapy and autologous stem cell transplantation are widely used in relapsed and primary refractory Hodgkin's disease. We transplanted 42 patients with Hodgkin's disease between 1990-1998. Median follow-up was 31 months (range 1-102). 29 (69%) were transplanted after relapse and 13 (31%) were refractory to first line therapy. Median age at transplantation was 29 years (range 19-58) and 23 (55%) were males.

All were treated with the BEAM protocol (carmustine, etoposide, cytarabine and melphelan). 18 who were in remission received radiotherapy following transplantation. The source of the stem cells was bone marrow in 17% and peripheral blood in 83%. At initial diagnosis: 57% had stage III-IV disease and B symptoms were present in 52%. 75% were treated with MOPP, ABVD or with related versions. Radiotherapy followed in 52%. Prior to transplantation, 45% of the relapsed group were in the advanced stage. 33% and 12% of all patients had lung and bone involvement, respectively.

The complete remission rate was 86% for the 2 groups. 2 (5%) died from transplant-related complications and MDS/AML developed in 2 (5%) after transplantation. The 3-year overall survival (OS) and disease-free survival (DFS) were 68% and 60%, respectively. The 3-year OS for the relapsed group was 64% compared with 76% for the refractory group, and the 3-year DFS for the relapsed group was 60% vs. 42% for the refractory group (neither difference significant). Radiotherapy following transplantation did not have a beneficial effect on DFS. No prognostic factors for outcome of transplantation were found, most probably due to the limited number of patients and the high variability of disease characteristics.

We conclude that high dose chemotherapy and autologous stem cell transplantation are effective and relatively safe for relapsed or primary refractory Hodgkin's disease. The DFS at 3 years was longer for those transplanted after relapse than those with primary refractory disease, but not significantly. Patients with primary refractory disease can be salvaged with high dose chemotherapy.

Sport-Related Maxillofacial Fractures

Yitzhak Shoshani, Navot Givol, Shlomo Taicher

Dept. of Oral and Maxillofacial Surgery, Sheba Medical Center, Tel Hashomer and Faculty of Dental Medicine, Tel Aviv University

The records of 537 patients with 750 maxillofaciafractures were reviewed and analyzed. 55 (10.2%) had sport-related injuries and the rest were due to othercauses. The sport-related group was predominantly male (ratio 9:1) with a mean age of 24.5 years. The mandible was most commonly injured (52.5%), followed by the zygomatic complex (32.8%). The incidence of complicated mid-facial fractures was only 2.8%, and of comminuted fractures 9%. This distribution of injuries is most likely due to the relatively low-energy of trauma associated with many sport activities. The relatively low mean age of the patients, most of whom had full dentition, allowed for conservative treatment of most of the mandibular fractures, using closed reduction.

Injuries were caused by 11 different sports. The highest incidence was soccer (45%), followed by skating (15%), basketball (9%) and horse-riding (9%). Contact sports were the cause of injuries in 72.2%, with the highest incidence of trauma due to impact with another player (60%). Better protection of the oral and maxillofacial region is needed, especially during high-contact sport.

Adjuvant Therapy of Large Bowel Carcinoma

G. Ezekiel, S. Walfisch, Y. Cohen*

Dept. of Oncology and Colorectal Unit, Soroka Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheba

The National Institutes of Health (NIH) held a consensus conference which recommended 5-FU and levamisole as adjuvant chemotherapy for colon cancer MAC (Modified Astler Coller) stage C.

From 1991-1994, 37 such patients diagnosed here were treated with 5-FU (intravenous dose of 450/mg/m²/d for 5 days and from day 29, once a week for 48 weeks) and oral levamisole (50 mg 3 times/d. for 3 days, every 2 weeks for a year), as suggested by NIH guidelines.

16 patients were males and 21 were females, mean age was 62 years and median 64. Cancer locations were: right colon (in 16, 43%), left colon (19, 51%), multiple colon primaries (2, 1%). 25 (68%) had 1-3 positive lymph nodes and 12 (32%) had 4 or more positive lymph nodes.

Only 20 (54%) finished treatment as prescribed. In the others, 1 or both drugs caused side-effects for which the drugs had to be stopped. 6 patients relapsed while on treatment.

The most common side-effects were diarrhea, stomatitis and bone marrow suppression. 3 were hospitalized due to neutropenic fever. 5-year actuarial survival of all patients was 61%; 5-year relapse-free survival was 61%; 5-year relapse-free survival of right versus left colon was 41% and 82%, respectively (p<0.01). There was no significant difference in 5-year survival of those with 1-3 positive lymph nodes as compared to those with 4 or more (62% and 56%, respectively). 5-year survival in those who finished or did not finish treatment (excluding those who stopped treatment because of progressive disease) was 83% and 70%, respectively (NS).

The 5-year survival of our series was similar to that of patients treated similarly elsewhere. The 5-FU and levamisole treatment was not tolerated well by our study population. It has recently been replaced in our service by a 5-FU and leucovorin regimen given for 6 months.

* Jules E. Harris Chair in Oncology.

Irradiation Injury of the Salivary Glands

R. M. Nagler

Dept. of Oral and Maxillofacial Surgery and Oral Biochemistry Laboratory, Rambam Medical Center and Technion Faculty of Medicine, Haifa

Ionizing irradiation of the salivary glands often leads to severe histological and functional alterations. Such exposure usually occurs during radiotherapy in patients with head and neck malignancy. The consequent xerostomia, often life-long, may result from even relatively low dosage irradiation, and causes a great deal of suffering. We suggest a radiobiological mechanism for this phenomenon which has been studied extensively since first described in 1911. The suggested injurious role of redox active transition metal ions and highly destructive free radicals is discussed in relation to the ultimate radiosensitive cellular target, DNA.

Oral Manifestations of Bulimia Nervosa

Doron Aframian, Alice Markitziu

Dept. of Oral Diagnosis, Medicine and Radiology, Hebrew University- Hadassah School of Dental Medicine, Jerusalem

Bulimia nervosa (BN) is an eating disorder frquently accompanied by changes of the hard and soft tissues of the oral cavity and of the salivary glands. Routine dental examination in a 25-year-old woman disclosed oral signs and symptoms characteristic of BN and she was referred for psychiatric evaluation. Oral evaluation of patients suspected of BN is recommended to prevent irreversible damage to the oral and perioral structures.

Tension-Free Repair of Inguinal Hernia with Properitoneal Mesh

Eduard Ramadan, Dan Seror, Roman Belavsky, Zeev Dreznik

Dept. of Surgery A, Rabin Medical Center, Golda Campus (Hasharon Hospital) Petah Tikvah, and Sackler School of Medicine, Tel Aviv University

The results of properitoneal mesh repair of inguinal hernia were evaluated in 38 of 43 consecutive patients operated by Stoppa's technique. In 33 patients the hernia was bilateral and in 10 unilateral; in 20 it was recurrent. In 33/43 patients the mesh was fixed either by sutures or metal clips. The overall recurrence rate after 22 (14-36) months of follow-up, was 10.5%. This result was composed of a 3.0% recurrence rate in the fixated-mesh group, and 30.0% among those with non-fixated mesh.

The outcome following the Stoppa method for tension-free properitoneal mesh repair of inguinal hernia, compares favorably with those of other methods, provided proper attention is paid to adequate mesh placement and fixation. Further prospective studies are needed to define the role and indications for this technique in the laparoscopic era.

Meningitis Due to Streptococcus Bovis Type 2

Anat Ben-Ami, Gera Gandelman, David Ergaz, Zev Shtoeger

Dept. of Medicine B, Kaplan Hospital, Rehovot (Affiliated with the Hadassah-Hebrew University Medical School)

Meningitis due to Streptococcus bovis is rare. Only 14 cases having been reported in the English literature. All patients (including the patient described) had an underlying disease or were treated by pharmacological agents that predisposed the patient to the infection. Most were treated by monotherapy with penicillin G (or amoxicillin) and recovered.

We describe a 74-year-old woman who had splenectomy as treatment for hairy cell leukemia 6 months before hospitalization for meningitis and sepsis by S. bovis type 2. She was successfully treated with intravenous amoxicillin. There was neither evidence of endocarditis nor carcinoma of the colon. Although the association between S. bovis meningitis and endocarditis or carcinoma of the gastrointestinal tract is not well established, we recommend a full work-up for GI malignancy and endocarditis in every patient with S. bovis meningitis.

Ambulatory Oral Procedures on Low-Dose Aspirin

Ronen Gaspar, Leon Ardekian, Benyamin Brenner, Micha Peled, Dov Laufer

Dept. of Oral and Maxillofacial Surgery, and Thrombosis and Hemostasis Unit, Rambam Medical Center, Haifa

Discontinuation of long-term, low-dose aspirin prior to ambulatory oral surgical procedures was assessed in a blind, controlled prospective study. 50 patients on low-dose aspirin who needed dental extractions, periodontal surgery, or other ambulatory oral surgery were randomly divided into test and control groups. The control patients stopped taking aspirin a week before operation, but in the test group aspirin was continued. Before, during and after surgery bleeding time was tested. Although bleeding time was significantly longer when aspirin was continued, in both groups it was within normal limits. Intraoperative hemorrhage was more frequent in those taking aspirin. Hemostasis control posed no problem and there were no postoperative complications in either group. It is concluded that discontinuing low-dose aspirin prior to elective oral surgery is not justified.

Aphthous Stomatitis as a First Manifestation of Crohn's Disease in a Child

Y. Gold, S. Reif

Dana Children's Hospital, Tel Aviv Medical Center

The incidence of Crohn's disease has risen dramatically over the past few years. The peak age of onset is in late adolescence, but it rarely occurs in the first few years of life. We describe a 5-year-old boy with recurrent bouts of fever, aphthous stomatitis, and anemia which did not respond to routine antibiotic therapy. It was only after a few months, when the characteristic symptoms of inflammatory bowel disease (IBD): abdominal pain and diarrhea appeared, that the diagnosis of Crohn's disease was made.

This case illustrates the difficulty in diagnosing IBD in young children. The presenting symptoms of IBD in children are often nonspecific and extra-intestinal. There is usually a low index of suspicion by the physician as to the possibility of IBD in a young child.