hemihyperplasia

Hemihyperplasia, also known as hemihypertrophy, is asymmetry in size between the right and left of the body, more than can be attributed to normal variation.

Terminology

Hemihyperplasia is more scientifically correct than hemihypertrophy as the cells are hyperplastic rather than hypertrophied .

Epidemiology

Incidence is estimated at 1 in ~50,000 live births .

Pathology

Etiology

Hemihyperplasia can arise sporadically as isolated hemihyperplasia, or it can arise as part of a syndrome :

Associations

Increased risk (5% of patients) of malignancy, most commonly Wilms tumors .

Differential diagnosis

  • hemiatrophy
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