Late-Onset Vitamin K Deficiency Presenting as Scrotal Bruising and Mediastinal Mass

: Although there are several reports of intracranial hemorrhage associated with vitamin K deficient bleeding, there are few reported cases of extracranial manifestations, specifically involving the thymus. Here, we discuss the unique case of a 4-week-old infant presenting with scrotal discoloration, respiratory distress, and widened mediastinum, found to have thymic hemorrhage related to confirmed coagulopathy secondary to late-onset vitamin K deficiency bleeding of the newborn.