Abstract
Cuplike Nuclei(CLN) cells, particularly rare in Acute Lymphoblastic Leukemia(ALL), have been documented in only few cases to date. A recent study has revealed a correlation between CLN and IKZF1 deletions in pediatric B-ALL. This study introduces a case of CLN in adult B-ALL with a translocation (4;11)(q21;q23), while discussing the current relevant literature on the subject. Through this examination, several unique characteristics of CLN cells in both ALL and Acute Myeloid Leukemia are highlighted. It is essential to accumulate further data to confirm these distinctive traits, and investigate the potential association between CLN and cytogenetic/molecular abnormalities.