title: Meniscal sizing based on gender, height, and weight.
abstract: OBJECTIVE
  Successful meniscus transplantation may depend on accurate sizing. Meniscal sizing is currently determined by measuring a combination of bony landmarks and soft-tissue insertion points through images obtained radiographically or by magnetic resonance imaging (MRI). The literature widely reports inaccuracy in sizing resulting from radiographic errors in magnification, erroneous identification of bony landmarks, and difficulty in differentiating between the soft-tissue and bone interface. In our meniscus transplantations we have observed that when the height and weight of the recipient matched those of the donor, the meniscal size appeared to be a match at surgical implantation; we designed this study to confirm this observation.
  
  
  METHODS
  The MRI-based meniscal sizing of 111 patients (63 male and 38 female patients; mean age, 44 years [range, 15 to 76 years]), totaling 147 menisci (87 lateral and 60 medial), was compared with the height, weight, gender, and body mass index (BMI) of each patient. MRI scans were obtained with a 1.0-Tesla MRI system (ONI Medical Systems, Wilmington, MA). Sizing was performed by an independent musculoskeletal MRI radiologist as established by the literature. Statistical methods include nonparametric Pearson correlation (r) between MRI-based lateral meniscal width, lateral meniscal length, medial meniscal width, medial meniscal length, total tibial plateau width, and patient height, weight, gender, and BMI. Significance at the P = .05 level was used.
  
  
  RESULTS
  Height was found to have a linear relationship to total tibial plateau, which has a good predictive correlation with meniscal dimensions of r > 0.7. Female patients generally present with smaller dimensions than male patients. High-BMI groups present with significantly larger meniscal dimensions than low-BMI groups at any given height.
  
  
  CONCLUSIONS
  Height, weight, and gender are easily obtained variables and are proportional to meniscal tissue dimensions. These exploratory statistics establish correlations between height, weight, gender, total tibial plateau width, and meniscal size.
  
  
  CONCLUSIONS
  Height, weight, and gender should be considered by both tissue banks and surgeons as fast and cost-effective variables by which to predict meniscal dimensions.
authors.affiliation: Stone Research Foundation, San Francisco, California 94123, USA. kstonemd@stoneclinic.com
authors.forename: Kevin R
authors.initials: KR
authors.lastname: Stone
authors.forename: Abhi
authors.initials: A
authors.lastname: Freyer
authors.forename: Thomas
authors.initials: T
authors.lastname: Turek
authors.forename: Ann W
authors.initials: AW
authors.lastname: Walgenbach
authors.forename: Sonali
authors.initials: S
authors.lastname: Wadhwa
authors.forename: John
authors.initials: J
authors.lastname: Crues
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001827:Body Height; D015992:Body Mass Index; D049628:Body Size; D001835:Body Weight; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D008592:Menisci, Tibial / Q000033:anatomy & histology* / Q000473:pathology* / Q000637:transplantation; D008875:Middle Aged; D011237:Predictive Value of Tests; D012737:Sex Factors; D013977:Tibia / Q000473:pathology