Transient hyperinsulinism associated with macrosomia, hypertrophic obstructive cardiomyopathy, hepatomegaly, and nephromegaly

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Figure 1.

Echocardiographic findings. (A) Case 1: evidence of severe HOCM with outflow tract obstruction. (B) Case 2: symmetrical HOCM but no obstruction.

Figure 2.

Echocardiogram showing resolution of the HOCM (case 2).