Subtypes

Absent thymus in an infant

May Be Caused by

 Common

Agammaglobulinemia

AIDS

Anemia

Birth trauma

Burn

Debilitation

Dysgammaglobulinemia

Sepsis

 Uncommon

Complete transposition of great vessels

Congenital adrenal hyperplasia

Congenital heart disease

Cyanotic congenital heart disease

Cyclophosphamide

Graft-versus-host disease

Nitrogen mustard

Radiation therapy

Steroid medication

Thymic agenesis

Trisomy 18

Trisomy 8

Zellweger syndrome