Which disorder is marked by sexual arousal from the suffering of another person?

Sexual Sadism Disorder is characterized by the experience of sexual arousal from the suffering, humiliation, or pain inflicted on another person. This disorder is specifically highlighted in the DSM-5 as focusing on the pleasure derived from the suffering of others, which aligns precisely with the description provided in the question.

Individuals diagnosed with Sexual Sadism Disorder engage in acts that lead to the suffering of a partner and find that such actions evoke significant sexual excitement. Importantly, the key feature that distinguishes Sexual Sadism from other paraphilic disorders is the emphasis on the sadistic aspect, where pleasure is directly linked to the infliction of emotional or physical pain.

In contrast, Sexual Masochism Disorder involves deriving pleasure from one's own suffering, which does not fit the description of being aroused by another's suffering. Fetishistic Disorder is characterized by a strong sexual attraction to specific objects or body parts but lacks the element of inflicting pain or suffering on others. Transvestic Disorder involves deriving sexual pleasure from cross-dressing, which is unrelated to the dynamics of suffering or sadism. Thus, Sexual Sadism Disorder is confirmed as the correct answer based on these definitions and characteristics.