Eran Pras, MD, Elon Pras, MD, Tengiz Bakhan, PhD, Etgar Levy-Nisenbaum, BSc, Hadas Lahat, MSc, Ehud I. Assia, MD, Hana J. Garzozi, Daniel L. Kastner, MD, PhD, Boleslaw Goldman, MD and Moshe Frydman, MD
Ilan Leibovitch, MD, Ronan Lev, MD, Yoram Mor, MD, Jacob Golomb, MD, Zohar A. Dotan and Jacob Ramon, MD
Background: Extensive necrosis is rare in primary renal cell carcinoma. This finding may reflect the biological characteristics of the carcinoma and therefore could be of prognostic and clinical value.
Objectives: To assess the incidence of necrosis in renal cell carcinoma and its potential prognostic value.
Methods: We conducted a consecutive retrospective study of 173 patients after radical nephrectomy for renal cell carcinoma. Clinical and pathological data were collected from hospital medical records and compiled into a computerized database.
Results: Extensive necrosis was found in 31 tumor specimens (17.9%). Univariate analysis showed that the specimens with extensive necrosis were significantly larger and manifested more perirenal and venous extension than the tumors without necrosis. The size of the renal tumor was the only parameter that remained significant in multivariate analysis (P=0.0001). Overall disease-free survival did not differ significantly between patients with necrotic tumors and those without (68% and 66% respectively).
Conclusions: The finding of extensive necrosis in renal cell carcinoma specimens does not seem to be related to tumor biology but rather may reflect the relation between size and vascularity of the tumor.
Yehiel Ziv, MD, Tamar Brosh, PhD, Gili Lushkov, MSc and Ariel Halevy, MD, FACS,
Background: The method of midline Iaparotomy incision and closure remains a complex surgical problem.
Objective: To compare the mechanical properties at the interface of midline laparotomy incision made by scalpel versus electrocutting current in rats.
Methods: A sharp midline laparotomy incision was made in 60 Wistar female rats using a scalpel or electrocautery to open the fascia. The fascial and skin wounds were closed separately with a continuous nylon. Fascial specimens were analyzed for mechanical properties at the midline incision using a loading machine. The load-extension curve was recorded during tensile loading at a steady extension rate of 15 mm/mm.
Results: There was no statistically significant difference between the two groups in either wound-bursting force (PPEAK) or the strain energy spent until the point of measured PPEAK. Each load-extension curve showed a characteristic pattern in all rats. Tissue stiffness was greater in the scalpel group than in the electrocautery group (P= 0.02). Correlations were found between tissue stiffness and strain energy, between tissue stiffness and bursting force, and between bursting force and strain energy.
Conclusions: While tissue stiffness was greater when a scalpel was used compared to electrocutting to incise the midline abdominal fascia in rats, there was no difference in the bursing force required to disrupt the wound.
Pablo Jeczmien, Yechiel Levkovitz, MD, Abraham Weizman, MD and Ziv Carmel, MD MmedSc
Although a depressive state is known to occur following the resolution of an acute psychotic episode, little research has investigated its etiology, course, prognosis and treatment. Very often the depression is mistaken for an extrapyramidallike syndrome — the secondary effect of antipsychotic medication - as a sense of inevitability assails both the patient and therapist. Post-psychotic depression, far from being an obscure and undefined clinical picture, has the characteristics of a clear-cut syndrome. Nevertheless, it was only recently referred to as a distinct entity in psychiatric classification systems. As a result, different researchers used varying criteria for the definition of the phenomenon, and the data collected in the different studies are therefore difficult to compare. We present a critical review of the data published to date, with emphasis on the importance of early recognition and treatment of post-psychotic depression.