In an HLA typing report, which of the following is the recommended way to express results for multiple alleles?

The preferred method for expressing results for multiple alleles in an HLA typing report is to format them as 0101/1101. This notation clearly distinguishes different alleles at a specific locus while following established conventions in HLA typing. The slash ("/") conveys that the alleles belong to a single individual, allowing for easier interpretation of heterozygosity, which is common in HLA genetics.

Using this format enhances clarity and provides a standardized way to represent the data, making it easier for clinicians and researchers to understand the specific alleles present without confusion. Other formats may lack this clarity; for example, writing alleles separated by commas might lead to ambiguity about their association, and the dash format is less commonly used in HLA reports. Additionally, stating to not report together would omit crucial information necessary for assessing compatibility for transplantation or disease association.