Definition: Balanitis xerotica obliterans (BXO) is a chronic dermatitis of unknown etiology most often involving the glans and prepuce but sometimes extending into the urethra.
References
Gargollo PC, Kozakewich HP, Bauer SB, Borer JG, Peters CA, Retik AB, Diamond DA. Balanitis xerotica obliterans in boys. J Urol. 2005 Oct;174(4 Pt 1):1409-12. PMID: 16145451