Most common organ involved by congenital TB is
Congenital tuberculosis is rare. The fetus may be infected hematogenously through umbilical vessels. The primary focus in this case is liver. In children with congenital TB, the liver is usually affected first, which adds to the hepatoxicity of the therapeutic regimens currently available Reference : Ghai essential pediatrics, eighth edition, page no:257
Liver
Pancreas
Kidney
Lung
Infectious disease