In this issue of CHEST (see page 738), the article by Chandan and colleagues offers a look at the utility of core roll preparations (CRPs) for the immediate assessment of neoplastic lung lesions. For those who have not heard the phrase core roll preparation before, it is used by the authors to refer to a type of imprint cytology sample that can be obtained from core needle biopsy specimens. Essentially, the core needle biopsy sample is transferred to and lightly rolled on a glass slide, to produce a cellular preparation that can be rapidly air-dried, stained, and reviewed by the pathologist to provide feedback about lesional representation and, often, diagnosis. The authors retrospectively reviewed stained slides from fine-needle aspiration (FNA) and core needle biopsy/CRP samples collected from the same patient during the same visit, and have reported that a specific malignant cell type could be determined for 23 of 25 patients (92%). This result was superior to those they obtained from FNAs alone or CRPs alone, both of which usually provided a malignant diagnosis but often were not conclusive, alone, for the determination of a specific histologic tumor type. Whether the results reflect the complementary values of both techniques or, instead, reflect the added value of more samples, cannot be discerned from the numbers. The authors, however, favor complementarity and suggest that the CRP smear pattern can provide architectural information that can help with the assignment of a specific histologic tumor type.