Transient erythroblastopenia of childhood
Transient erythroblastopenia of childhood (TEC) is a slowly developing anemia of early childhood characterized by gradual onset of pallor.

Signs and symptoms
Individuals with TEC have a median age of presentation of 18–26 months; however, the disorder may occur in infants younger than 6 months and in children as old as age 10 years.
Because of the gradual onset of the anemia, children are often healthier than expected from their low hemoglobin levels.

Cause
The cause of TEC is unknown, but it thought to be triggered by a viral infection.  While rare cases have been attributed to infection with Parvovirus B19, the majority of cases are not related to Parvovirus infection.  This is in contrast to transient aplastic crisis, seen in patients with hemoglobinopathies such as sickle cell disease, which is usually caused by Parvovirus infection.

Diagnosis
Children typically present with a moderate normocytic anemia (usual range: Hemoglobin 5-8 g/dL) and reticulocytopenia. Mean corpuscular volume (MCV) is usually normal for age. Hemoglobin F levels are also typically normal.

Prognosis
Most patients recover completely within 1–2 months.
However many reported cases have lasted 18–24 months and longer.

References
External links
ped/2279 at eMedicine