OBJECTIVES: To assess interobserver and intraobserver concordance for identifying positive and negative margins in staged excisions of @entity552 and @entity320 and to determine if control biopsy specimens are useful to improve concordance. DESIGN: Retrospective, randomized interobserver and intraobserver comparison study of archived pathologic specimens. The study was conducted in 3 phases, and slides were evaluated blindly and independently by 5 pathologists: in phase 1, all slides were randomized and diagnosed as positive or negative. In phase 2, every third slide was evaluated again and diagnosed as positive or negative. In phase 3, slides were organized into cases, allowing evaluation of each margin in the context of the positive control ( @entity5 from the center of the lesion) and negative control (control biopsy specimen), if available. SETTING: University referral center. STUDY MATERIAL: A total of 301 glass microscopic slides from 27 @entity1 who underwent staged excision for @entity552 or @entity320 from March 1997 to April 2001. MAIN OUTCOME MEASURES: Interobserver and intraobserver concordance between original diagnoses and study diagnoses rendered on all slides by 5 pathologists. RESULTS: Phase 1 and 3 agreement was moderate (kappa range, 0.4-0.5). Phase 2 (intraobserver) agreement was moderate to good for all pathologists (kappa range, 0.6-0.9). Subset analysis revealed a statistically significant increase in agreement with the use of a control strip biopsy specimen for difficult slides. CONCLUSIONS: Interobserver concordance for margin analysis in @entity552 and @entity320 is moderate, and intraobserver concordance is moderate to good. A control strip biopsy specimen may improve concordance in some cases.

Histopathologic recognition of involved margins of XXXX excised by staged excision: an interobserver comparison study.

@entity552 :: ('MESH:D018327', 'Disease') :: ['lentigo maligna'] @entity1 :: ('9606', 'Species') :: ['patients'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumor'] @entity320 :: ('MESH:D008545', 'Disease') :: ['lentigo maligna melanoma']
@entity552 :: (MESH:D018327,Disease) :: ['lentigo maligna']
