In what scenario can both lesion types of AVM show accelerated growth?

The correct answer highlights that both lesion types of arteriovenous malformations (AVMs) can demonstrate accelerated growth during adolescence and pregnancy due to the significant hormonal and physiological changes occurring in the body during these periods.

During adolescence, the body undergoes rapid growth and development, accompanied by an increase in blood flow and metabolic activity, which can stimulate the vascular system, including AVMs. Similarly, pregnancy involves dramatic changes in hormone levels, as well as increased blood volume and cardiac output to support the developing fetus. These factors can contribute to the enlargement of existing vascular lesions, including AVMs, due to increased hemodynamic stress and vascular remodeling in response to altered physiological states.

In contrast, the other scenarios, like childhood development, physical exercise, and trauma, may not consistently induce accelerated growth of both lesion types. While childhood development may influence growth, the response can vary widely among individuals and is not as pronounced as during the defined hormonal changes of adolescence and pregnancy. Physical exercise and trauma can lead to localized blood flow changes, but they do not necessarily induce the systemic growth response characteristic of AVMs as effectively as the changes seen in adolescence and pregnancy.