Discussion of Workshop Cases
There were 32 cases included in this workshop session. Several cases submitted initially to this session did not completely meet the criteria for MPAL and were moved to other sessions, although the moving in some cases was debated by members of the review panel, revealing the need for more robust criteria and greater consensus on definitions. The workshop cases are discussed in the subtypes to which they were allocated. The summary of these cases (below) illustrates the heterogeneity of MPAL presentation. The following discussion also describes the characteristics of MPAL cases, technical issues involved in MPAL diagnosis, and groups of cases that can be linked by some common characteristics or diagnostic issues.