Morphology of conjunctival progressive nevus

Structural features of 59 progressive nevuses of the conjunctiva were studied. The proliferation of the epithelium and melanocytes is partially compensated by spontaneous regression of the nevus structures. The growth of a nevus is structurally similar to tumor growth, but the nevuses lack the melanocyte dysplasia, the main sign of malignant degeneration. The immune reactions are involved in the tissue restructuring of the growing nevus. Permanent foci of photoelastosis reflect the significance of ultraviolet exposure as a factor of risk of the nevuses progress.     

A study of the spinal fluid flow by magnetic resonance imaging

The study was undertaken to examine the potentialities of new MRI techniques (MR-myelocysternoventriculography and phasic contrast-enhanced MRI with reference to a cardiac cycle) in visualizing the spinal fluid system and flow in different groups of neurosurgical patients. MR-myelocysternoventriculography was based on the sequences of SSFP-3D (Signa, GE, 1.5 T) and PSIF-3D (Magnetom 42SP, Siemens, 1.0 T). These regimens were applied to obtain highly T2*-weighed images. These techniques were used in 280 patients. Phasic contrast-enhanced MRI with reference to a cardiac cycle was performed in the axial (through the aqueduct of the cerebrum) and sagittal projects (CINE-2D mode, Signa GE). This technique was employed to study 30 patients and 5 healthy volunteers. MRI-cysternography based on SSFP-3D- and PSIF-3D sequences is recommended as the method of choice in evaluating the 3rd ventriculostoma and, in combination with spiral computed tomography, in detecting fistulas of the base of the skull. Phasic contrast-enhanced MRI with reference to a cardiac cycle yielded the values of spinal fluid flow through the aqueduct of the cerebrum in health: Vsyst max = 4.1 +/- 1.3 cm/sec; Vsyst mean = 2.5 +/- 1.4 cm/sec; Vdiast max = 3.4 +/- 1.5 cm/sec; Vdist mean = 2.5 +/- 1.7 cm/sec (N = 5). The prospect of the technique is to develop recommendations and to predict prognosis while making bypass surgery for ventriculostomas and cystostomas.     

The ways of the efficacy raising in surgical treatment of patients with colonic cancer

The indications extension for the radical surgical intervention conduction in elderly and senile patients and with locally spreading colonic cancer had promoted the result of their treatment improvement.