Breakthrough pain characteristics and syndromes in patients with cancer pain. An international survey

Breakthrough pain (BKP) is a transitory flare of pain that occurs on a background of relatively well controlled baseline pain. Previous surveys have found that BKP is highly prevalent among patients with cancer pain and predicts more severe pain, pain-related distress and functional impairment, and relatively poor quality of life. An international group of investigators assembled by a task force of the International Association for the Study of Pain (IASP) evaluated the prevalence and characteristics of BKP as part of a prospective, cross-sectional survey of cancer pain. Fifty-eight clinicians in 24 countries evaluated a total of 1095 patients with cancer pain using patient-rated items from the Brief Pain Inventory (BPI) and observer-rated measures. The observer-rated information included demographic and tumor-related data, the occurrence of BKP, and responses on checklists of pain syndromes and pathophysiologies. The clinicians reported BKP in 64.8% of patients. Physicians from English-speaking countries were significantly more likely to report BKP than other physicians. BKP was associated with higher pain scores and functional interference on the BPI. Multivariate analysis showed an independent association of BKP with the presence of more than one pain, a vertebral pain syndrome, pain due to plexopathy, and English-speaking country. These data confirm the high prevalence of BKP, its association with more severe pain and functional impairment, and its relationship to specific cancer pain syndromes. Further studies are needed to characterize subtypes of BKP. The uneven distribution of BKP reporting across pain specialists from different countries suggests that more standardized methods for diagnosing BKP are needed.

Energy expenditure during allogeneic and autologous bone marrow transplantation

Resting energy expenditure (REE) was measured by indirect calorimetry during allogeneic and autologous bone marrow transplantation in order to evaluate the evolution in allogeneic and autologous recipient patients. REE values obtained with indirect calorimetry and compared with values using the Harris-Benedict formula were different. Evolution of REE during aplasia were significantly different in autologous and allogeneic recipients with an increase 11.5 ' 10.8 cent for autologous and a decrease of - 7.3 ' 8.9 cent in allogeneic bone marrow transplantation (BMT) patients. There were no differences in nutritional status and REE before BMT, at discharge and 1 month after discharge between the two groups but all patients had inflicted damage on their nutritional status at discharge from hospital after BMT. However, these patients differed because of the decrease in oral nutritional intake and an increase in the length of aplasia and hospital stay in allogeneic patients. Currently, there is no proof that recommendations for nutritional interventions or results of nutritional investigations in allogeneic BMT can be extrapolated in autologous patients. Harris-Benedict formula does not estimate the energy expenditure of patients submitted to massive chemotherapy and BMT with enough precision because of the great differences in individuals.

[Morphine therapy: evaluation of patient information]

Pain is frequent in the course of cancer and can have negative consequences on patients quality of life. The great majority of patients can be helped by simple treatments. The prescription of morphine (M) must be preceded by some explanations. In order to verify the reality of these explanations, a study was done in a 230 comprehensive beds Cancer Centre, with 129 patients, randomized between all the patients hospitalized. In an open questionnaire, different aspects were studied. One hundred answers were studied: 63 patients did not have M at any time: group M-; 37 patients had M (19) or have had M (18): group M+; 97% of the patients in group M+ thought that M decreased pain, for 85% patients in group M-. Morphine treatment was effective in 92% of patients M+, and not very effective in 5%; 67% of patients M- thought that M is efficient but 17% did not know; 76% of patients M+ did not worry about M; 13% worried et 11% did not know. For patients M- only 48% did not worry; 41% worried and 11% did not know. The side effect known by the patients, and spontaneously quoted were constipation (12 patients in M+ group). For 14 patients there was no problem and 2 did not know. In M- group 49 patients did not know. Only 8% of M+ group were afraid by addiction, but 44% in group M-; 97% patients M+ said that they could stop without problem against only 38% of the patients in M- group. For 16% of M+ group, the use of M had a bad signification about their disease, but 52% of M- group thought that if morphine was used in their cases, the meaning would be very bad. The differences between the two groups allow to think that the prescription of M in this study is explained, and that the patients receiving M are rather well informed. Patients with cancer but without M do not have good information and their knowledge is similar than general population. The use of recommended therapy and explanations allowed patients with M therapy to be comfortable with this prescription.

Postoperative infections in immunocompromised patients after oncological surgery

Immunodeficiency secondary to cancer chemotherapy (chemotherapy for less than 3 months, or intensive chemotherapy with bone marrow transplant) may be responsible for postoperative infections. To estimate the value of this hypothesis, a prospective study was done over a period of 18 months in patients who had undergone pulmonary surgery. Antibiotic prophylaxis was by pefloxacin, one tablet (400 mg) 1 h before surgery then 11 h after. Clinical examination, a chest X-ray and blood cell count were carried out every day for 10 days and on the 15th day. All the drain-tips were cultured. In a case of infection, samples were obtained and cultured. One group comprised 22 immunodeficient patients (group A), and 33 patients (group B) had received no prior chemotherapy (bone-marrow transplantation = 36.7%). There were differences between the two groups in age (A:33.5 +/- 12.3 years; B:50.8 +/- 18.4 years), and type of tumour (A: metastasis = 95.5%; B: lung cancer = 51.5%). Surgical operation was bilateral for 36.4% of the patients in group A. There was more anatomical resection (pneumonectomy and lobectomy) in group B. Lung function did not differ between the two groups (abnormalities: A = 54.6%; B = 63.6%). In group A, there were 3 pulmonary infections (13.7%), but in group B 10 infections (30.3%) with 9 pulmonary infections (4 with bacteraemia) and 1 wound infection. The bacteriological finding showed two pathogens in 7 cases and no bacteriological isolates in 2 cases. With broad-spectrum antibiotherapy all the patients were cured except 1. There was one postoperative death in group B. This patient died of respiratory distress after pneumonectomy complicated by pneumonia and septicaemia (Streptococcus pneumoniae) in the remaining lung. Surgical procedures are performed with increasing frequency on patients with immunocompromised status. Classically the risk of infection is more important for these patients. In this study prior cancer chemotherapy or bone marrow transplantation did not seem to be an aggravating factor of the risk of infection. But further methodological analysis would not allow us to distinguish between a real impact of chemotherapy and the influence of group heterogeneity.

Clinical evaluation of the CORDIS vascular access port systems: a multicenter study

Two non-metallic vascular access port systems, the Multipurpose Access Port (MPAP) and Miniport, developed by CORDIS S.A., France, have been evaluated clinically in 78 cancer patients. During the investigational period covering a total experience of 369 treatment cycles and 1,370 infusion days, no cases of infection or septicemia were observed. Serious complications such as drug extravasation and catheter occlusion occurred, although the incidence was relatively low (+/- 1%) when compared with the number of treatment courses (cycles), but in relation to the number of patients included in this study, the procedure-related complication rate was 17.5% for the MPAP and 15.8% for the Miniport. Procedure-related complications can be avoided by proper handling and use of suitable drug combinations to minimize crystallization reactions within the port-catheter systems. The final complication rate (total minus procedure-related) in terms of termination of treatment, i.e. explantation of the port-catheter system was 12.1% for the MPAP and 12.5% for the MINIPORT, which generally confirms the results of other groups. More than 87% of both port-catheter systems were still functional at the end of evaluation.

Phase I trial of recombinant interleukin-2 followed by recombinant tumor necrosis factor in patients with metastatic cancer

In this Phase I trial, the feasibility of sequential administration of continuous intravenous recombinant interleukin-2 (rIL-2) at 18 x 10(6) IU/m2/day for 6 days, followed by three daily bolus intravenous recombinant tumor necrosis factor (rTNF) infusions at doses escalating between 10 and 120 micrograms/m2/day, was investigated in 31 patients with metastatic malignancies. Prophylactic use of indomethacin prior to and during rTNF administration was found to significantly reduce toxicity. However, despite prophylactic indomethacin, a maximum tolerated dose of rTNF of 120 micrograms/m2 was reached. The limiting toxicity was hypotension. Predictable flu-like toxicities (i.e., fever/chills, hypotension, gastrointestinal toxicity, edema, malaise) were seen in most patients. These started during the rIL-2 infusion and continued during rTNF administration, particularly in the absence of indomethacin. Hematological, renal, and hepatic toxicities were not dose limiting. These toxicities were all reversible after treatment interruption. Pulmonary toxicity [i.e., anaphylactic-like reactions, bronchospasms, and adult respiratory distress syndrome (ARDS)] was seen in several patients immediately after rTNF infusions, irrespective of the rTNF dose or treatment cycle, and mainly in patients with extensive pulmonary metastases. The combined effect of treatment-related ARDS, lung metastases, and a Guillain-Barré syndrome led to the death of one patient. Two partial responses were seen in this study (i.e., breast and renal cancer). Based on these results, a Phase II trial of rIL-2 followed by rTNF has been initiated in metastatic breast cancer patients.

[Adverse effects of interleukin 2]

Interleukin 2, has frequent and important side effects. Toxic effects observed are systemic (fever, chills, malaise), hemodynamic (capillary leak syndrome, hypotension), cardiac (arrhythmia, infarction), renal (renal dysfunction), infectious (septicemia), cutaneous, hematologic, gastrointestinal, endocrinologic and metabolic. Side effects are dose-dependent, generally reversible, with a mortality from 1 to 3%. Regimens of administration and other cytokine combinations affect interleukin 2 toxicity. If the treatment of these side effects is well known, selection of patients and specialized care unit remain always necessary.

Intravenous interleukin-2 just after high dose BCNU and autologous bone marrow transplantation. Report of a multicentric French pilot study

This multicentric pilot study was conducted in order to evaluate the feasibility of early interleukin-2 (IL2) after high dose chemotherapy requiring autologous bone marrow transplantation (ABMT). BCNU at 800 mg/m2 was followed, 3 days later, by the reinjection of the bone marrow cells. At day 4, IL2 at 18 x 10(6) i.u./m2/day was given as a continuous infusion during a minimum of 6 days (first phase of study) or for 6 more days after 1 day break (second phase of the study). Twenty patients were included. Toxicity was not negligible, with one toxic death, but IL2 therapy does not damage the haematological recovery of most patients. However, a 6-day IL2 treatment period only appears tolerable. In 18 evaluable patients, three responses were observed: one complete response (CR) of short duration in a non-Hodgkin's lymphoma, one CR (24 months +) and one partial response (PR) (6 months) in two patients with metastatic gastric adenocarcinoma. This study confirms that IL2, restricted to a 6-day treatment period, is feasible immediately after high-dose chemotherapy requiring ABMT without haematological problem in most patients. The response rate was unexpected for a pilot study and this combined therapy obviously requires further study.

Alteration of the inner surface of venous catheters by antineoplastic drugs

Septic complications and thrombosis are frequent causes of long-term venous catheter implantation failure and tend to occur more frequently in oncology than in patients using catheters for hyperalimentation only. The purpose of this in vitro study was to study extensively the inner surface behaviour and the possible changes in their mechanical properties of various silicone and polyurethane catheters after exposure to a flow of the most common antineoplastic drugs. Silicone catheters appeared to be the best choice for cytostatic drug infusions because of their chemical stability, but the addition of an opacifier imposes a protective inner and outer layer to improve their surface properties for biocompatibility.

Using the costal muscle flap with latissimus dorsi muscle to repair full-thickness anterior chest wall defects

Musculoosseous flaps with latissimus dorsi muscle are used for reconstruction of full-thickness anterior chest wall defects. The 11th and 12th ribs and the posterior parietal pleura are elevated with the latissimus dorsi muscle. The blood supply of the compound flap comes from the thoracodorsal pedicle and from perforating segmental vessels. The posterior thoracic wall island is transferred to the anterior chest wall defect to restore a skeletal plane and the transposed latissimus dorsi obliterates all the dead spaces that cannot be collapsed. The latissimus dorsi compound flap with the 11th and 12th ribs appears to be a "safe" procedure to reconstruct full-thickness anterior chest wall defects.