PAEDIATRIC PATHOLOGY
AMMAR C. ALRIKABI, MD, FRCPath (UK), F.I.A.C.Associate Professor and Consultant PathologistKing Saud University and King Khalid University
HospitalP.O. Box 2925, Riyadh 11461,Kingdom of Saudi
Arabia
Disruptions occur in a normally developing organ because of an extrinsic abnormality that interferes with normal morphogenesis.