Blood products are frequently collected in one country and used within another country as part of military operations, international relief efforts, or meeting the needs of recipients with uncommon product requirements. To that end, the World Health Organization in collaboration with ICCBBA maintains the ISBT 128 coding system for all medical products of human origin including blood, organs, bone marrow, and cord blood.

	Justin Juskewitch, M.D., Ph.D. Fellow, Clinical Informatics Mayo Clinic
	James Stubbs, M.D. Consultant, Transfusion Medicine Mayo Clinic Assistant Professor of Laboratory Medicine and Pathology Mayo Clinic College of Medicine

An 18-month-old boy presented with nausea, vomiting, and progressive somnolence. Imaging studies revealed a large mass in the fourth ventricle, associated with obstructive hydrocephalus. He underwent gross total resection of the tumor.

	Amy Swanson, M.D. Fellow, Anatomic Pathology/Neuropathology Mayo Clinic
	Aditya Raghunathan, M.D. Consultant, Anatomic Pathology Mayo Clinic Assistant Professor of Laboratory Medicine and Pathology Mayo Clinic College of Medicine

A 47-year-old woman presented with a palpable breast mass.

	Toshi Ghosh, M.D. Resident, Anatomic and Clinical Pathology Mayo Clinic
	Daniel Visscher, M.D. Consultant, Anatomic Pathology Mayo Clinic Professor of Laboratory Medicine and Pathology Mayo Clinic College of Medicine

A 47-year-old woman presented with a palpable breast mass.

	Toshi Ghosh, M.D. Resident, Anatomic and Clinical Pathology Mayo Clinic
	Daniel Visscher, M.D. Consultant, Anatomic Pathology Mayo Clinic Professor of Laboratory Medicine and Pathology Mayo Clinic College of Medicine