Which condition refers to an overall increase in size of an organ, yet maintains normal arrangement of cells?

The condition described, where there is an overall increase in the size of an organ while maintaining the normal arrangement of cells, is best represented by hypertrophy. Hypertrophy is the physiological or pathological enlargement of cells, resulting in increased organ size without altering the tissue architecture. This typically occurs in response to increased workload or hormonal stimulation, as seen in muscle growth due to exercise or the heart enlarging in response to hypertension.

In contrast, dysplasia refers to abnormal changes in the size, shape, and organization of cells, which can indicate a precancerous condition. Aplasia means a failure of an organ or tissue to develop or grow, leading to incomplete formation. Hypoplasia is characterized by underdevelopment or incomplete development of an organ or tissue, resulting in reduced size. These conditions do not describe the situation of increased organ size while retaining normal cellular structure.