title: Composite multifocal basal cell carcinoma and precursor B acute lymphoblastic leukemia: case report.
abstract: Synchronous composite tumors though described are uncommon. Moreover, simultaneous occurrence of synchronous tumors involving the same tissue or organ at multiple sites is even less common. We report a case of acute lymphoblastic leukemia (ALL) and basal cell carcinoma (BCC) occurring simultaneously in multiple skin sites. Several cases showing an association between cutaneous malignancies and lymphoproliferative disorders have been reported. Some of these cases included ALL and BCC and occurred often in the pediatric population with the BCC arising as a post-ALL therapy sequela. Other rare genetic causes may be considered. To our knowledge this is the first time that the synchronous occurrence of these two malignant processes in the same tissue involving multiple sites in an elderly patient is described.
authors: Department of Pathology and Laboratory Medicine, McMaster University, Hamilton, Ontario, Canada. dina_eldemellawy@rogers.com
authors: Dina
authors: D
authors: El Demellawy
authors: Monalisa
authors: M
authors: Sur
authors: Catherine
authors: C
authors: Ross
authors: Franco
authors: F
authors: DeNardi
authors: Salem
authors: S
authors: Alowami
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