coincidence of conchachoanal polyp and complete mulberry hypertrophy of inferior concha we report two unique cases of 50 and 28yearold turkish men with coincidence of conchachoanal polyp and mulberry hypertrophy of the inferior concha we operated on both cases with endoscopic stripping of the polypoid tissue while preserving the periosteum and healthy mucosa of the inferior nasal concha the polypoid tile of the left inferior nasal concha was resected in the case with mulberry hypertrophy at only the tail of the concha both cases reported significant relief of symptoms after the operations an introduction to multiple time series analysis an expository account of multiple time series analysis is presented modeling several related time series together makes it possible to ascertain dynamic leading lagging and feedback relationships among the series to produce more efficient forecasts and in some situations to develop control schemes procedures for building linear vector autoregressive moving average models are sketched and illustrated an extension to parallel vector time series in a hierarchical framework is given