Israel Medical Association Journal

Background: Common peroneal neuropathies, usually located at the fibular head, are one of the causes of drop foot, a condition often evaluated in the electromyography laboratory.

Objectives: To study the motor conduction properties of the common peroneal nerve and its branches of distribution in patients with paralyzed drop foot, several weeks after their first stroke, assuming that its inversion position can cause neuropathy around the fibular neck.

Methods: We performed peroneal nerve conduction study on 76 legs of 38 patients, 12–73 days after their first stroke. All the patients had flaccid drop foot on the involved side. The stimulating electrode was placed at the postero-lateral aspect of the fibular neck. Motor nerve conduction latency and compound muscle action potential amplitude were measured along the proximal part of the deep and the superficial peroneal nerve, comparing the paralyzed to the sound leg. Paired sample t-test and paired t-test were used to compare the nerve conduction properties between the sound and the paralytic leg. The linear liaison between the two legs was determined by Pearson coefficient and the test based on it.

Results: The differences between motor conduction latencies and between CMAP[1] amplitudes, comparing the paralyzed to the sound side, recorded in both the deep peroneal nerve and the superficial peroneal nerve, were statistically significant (P < 0.05).
Conclusions: It seems that the permanent equino-varus position of the paralyzed foot might affect common peroneal nerve conduction properties at the level of the fibular neck by demyelination, axonopathy, or both. Possible reasons for these pathological changes are nerve traction or nerve compression, but temperature changes in the paralytic leg should also be considered. Ankle-foot orthoses can be prescribed for prevention or correction of deformities of the foot and ankle and reduction of the weight-bearing forces

Background: In an era of increasing antimicrobial resistance, knowledge of local antimicrobial susceptibility patterns of common uropathogens is essential for prudent empiric therapy of community-acquired urinary tract infections.

Objectives: To define antimicrobial susceptibility of Gram-negative uropathogens in northern Israel over a 10 year period and to compare it with antibiotic-use patterns in the same community.

Methods: We tested the susceptibility of all Gram-negative urinary isolates from outpatients at HaEmek Medical Center over the years 1995, 1999, 2002 and 2005 to common antimicrobial agents. MIC₉₀ of Escherichia coli to some of these agents was determined and antibiotic consumption data over the years 2000–2005 (DDD/1000/day) were obtained.

Results: We observed a rise in susceptibility rates of E. coli to amoxicillin-clavulanate, trimethoprim-sulfamethoxazole and nitrofurantoin and of other Gram-negative isolates to amoxicillin-clavulanate, ceftriaxone and cephalothin. Susceptibility rates of all Gram-negative uropathogens to ciprofloxacin decreased significantly. MIC₉₀ of E. coli for all drugs tested remained stable. There was a significant decrease in the use nitrofurantoin and TMP-SMX[1] and a significant increase in the use of ampicillin, cephalothin and ceftriaxone.

Conclusions: Antibiotic resistance patterns mostly remained unchanged or improved slightly. There was, however, a constant decrease in susceptibility of all Gram-negative uropathogens to ciprofloxacin. Antibiotic use patterns could not explain the changes seen in antibiotic susceptibility patterns.

Background: The diagnosis of gastrointestinal stromal tumors is based on documentation of c-KIT and platelet-derived growth factor-alpha receptors or specific c-KIT mutations. Before the diagnosis of GIST[1] was possible, all cases had been classified as sarcomas or benign tumors.

Objectives: To identify cases of GIST formerly diagnosed as abdominal or retroperitoneal mesenchymal tumors.

Methods: We reviewed the archive material on all surgical cases diagnosed as gastrointestinal related malignant mesenchymal tumors or GIST in our medical center during the last decade (1995–2004).

Results: Sixty-eight cases of retroperitoneal soft tissue sarcoma were identified. Thirty-eight were reconfirmed to be GIST, 19 were newly diagnosed as GIST (the hidden cases), 8 cases were re-diagnosed as mesenchymal tumors, and 3 cases of sarcoma remained sarcomas. Of all the GIST tumors, c-KIT-positive and PDGFRα[2]-positive tumors were more characteristic of primary gastric tumors, while c-KIT-positive and PDGFRα-negative tumors were found in the colorectal area. The c-KIT-negative and PDGFRα-positive cases were of gastric origin.

Conclusions: Any c-KIT-negative malignant mesenchymal mass located near the proximal gastrointestinal tract should also be stained for PDGFRα to differentiate between GIST and other soft tissue sarcomas. Practically, formerly diagnosed abdominal or retroperitoneal soft tissue sarcomas should be reviewed to identify patients with misdiagnosed GIST and thereby avoid future unnecessary and ineffective chemotherapy.