Most rhabdomyomas actually usually regress spontaneously.

大多数横纹肌通常会自发消退。

The most common primary cardiac tumor in infants and children are rhabdomyomas.

婴儿和儿童最常见的原发性脏肿是横纹肌。

Rhabdomyo refers to striated muscle tissue, or cardiac muscle tissue in this case, so rhabdomyomas are benign tumors of the heart that usually affect the ventricles, and are best considered hamartomas rather than a true neoplasm.

横纹肌指的是条状的肌肉组织，这里就指肌；横纹肌是良性肿，且通常累及室，最好被认为错构而非肿。