One case of unilaterally developed acute retinal necrosis syndrome was studied with retina and vitreous from biopsy during operation through electronmicroscope pathologically and virolo gically. In photoreceptor cells, generalized necrosis was found: loss of outer segments, fragmentation of inner segments, and decrease of mitochondria in ellipsoids. Bipolar cells and axons were well preserved. Internal limiting membrane was intact, and covered by an unidentified cell. Degenerated retinal proper had various sized vacuoles. Around the intraretinal vessels, neutrophils and lymphocytes were infiltrated considering vasculitis. In ganglion cells, swelling of mitochondrias were seen, and their cell organelles were decreased, No virus particle was detected in all layers of the retina with electronmicroscope.
Axons ; Biopsy ; Ganglion Cysts ; Lymphocytes ; Membranes ; Mitochondria ; Necrosis ; Neutrophils ; Organelles ; Photoreceptor Cells ; Retina ; Retinal Necrosis Syndrome, Acute* ; Retinaldehyde ; Vacuoles ; Vasculitis ; Virion

PURPOSE: To assess the usefulness of MRI in preoperative diagnosis of congenital anorectal malformation MATERIALS AND METHODS: MR findings of 11 cases with surgically proved anorectal malformations were retrospectively reviewed and compared with operative findings, according to the level of atresia, the development of sphincter muscle, fistula and associated anomalies of other organs. RESULTS: Four of 11 cases were low type of anorectal atresia, 3 cases were intermediate type, and 3 cases were high type. There was one case of Currarino triad with low type of anorectal stenosis. MRI demonstrated the levels of atresia correctly in all cases and revealed fistulas in all high type of anomalies. Degrees of the development of the sphincter muscles were good in all cases of low types and fair in a case of intermediate type and an anorectal stenosis, whereas the development was poor in 2 cases of intermediate type and all 4 cases of high type. The associated anomalies in anorectal malformation were renal agenesis, congenital hip dysplasia and sacral defect with presacral teratoma in Currarino triad. CONCLUSION: MRI was a simple and useful study to confirm the level of atresia, fistula and associated anomalies in the diagnosis of the congenital anorectal malformation.
Constriction, Pathologic ; Diagnosis ; Fistula ; Hip Dislocation, Congenital ; Magnetic Resonance Imaging ; Muscles ; Retrospective Studies ; Teratoma