ABSTRACT
<p><b>OBJECTIVE</b>To study the application of cluster analysis in micrangium detection in malignant nasal and paranasal sinus tumor.</p><p><b>METHODS</b>Microvessel density (MVD) counting and cluster analysis were used to detect the micrangium in patients with malignant nasal and paranasal sinus tumor to assess the association between the malignancy and MVD.</p><p><b>RESULTS</b>According to cluster analysis, the MVD counting could be clustered into two groups, and the MVD showed significant differences between the tumor tissues, adjacent normal tissue and the control group (P<0.01), a result consistent with that by analysis of variance of the MVD.</p><p><b>CONCLUSION</b>Cluster analysis can be used in clustering of MVD counting in malignant nasal and paranasal sinus tumor to simplify MVD counting, and offers an important analytic method for micrangium analysis in tumors.</p>
Subject(s)
Adolescent , Adult , Aged , Aged, 80 and over , Child , Child, Preschool , Female , Humans , Male , Middle Aged , Young Adult , Cluster Analysis , Microvessels , Neovascularization, Pathologic , Pathology , Paranasal Sinus Neoplasms , DiagnosisABSTRACT
Objective To investigate the usage of distortion product otoacoustic emissions(DPOAE) in normal infants hearing screening.Methods One hundred infants(200 ears) without clinical condition of illness were checked in GSI 70 DPOAE screening.The pure tones were 2,3,4 kHz,the OAE screener scored the test result as a pass,when the responses were above the PASS/REFER line and the signal-to-noise was at least 10 dB.Results Ninty-four infants(188 ears) passed hearing screening. Four infants(8 ears) with ceruminous impaction didn′t pass screening;after extracting impacted cerumen from the external auditory meatus,the 4 infants(8 ears) passed screening.Two infants(2 ears) with secretory otitis media didn′t pass screening,but after medicine treatment for 1 week,they passed screening too.Conclusion DPOAE has advantages in infants hearing screening.J Appl Clin Pediatr,2006,21(3):168-169