<unk>  is a disorder that involves hoarding of rubbish and severe self-neglect. In addition, the syndrome is characterized by domestic squalor, syllogomania, social alienation, and refusal of help. It has been shown that the syndrome is caused as a reaction to stress that was experienced by the patient. The time span in which the syndrome develops is undefined, though it is most accurately distinguished as a reaction to stress that occurs late in life. In most instances, patients were observed to have an abnormal possessiveness and patterns of compilation in a disordered manner. These symptoms suggest damage to the prefrontal areas of the brain, due to its relation to decision making. In contrast, there have also been cases where the hoarded objects were arranged in a methodical manner, which may suggest a cause other than brain damage. Although most patients have been observed to come from homes with poor conditions, and many had been faced with poverty for a long period of time, these similarities are not considered a definite cause to the syndrome. Research showed that some of the participants with the condition had solid family backgrounds as well as successful professional lives. Half of the patients were of higher intelligence level. This indicates the<unk>  does not exclusively affect those experiencing poverty or those who had traumatic childhood experiences. The severe neglect that they bring on themselves usually results in physical collapse or mental breakdown. Most individuals who suffer from the syndrome do not get identified until they face this stage of collapse, due to their predilection to refuse help from others. Personality traits that can be seen frequently in patients diagnosed with<unk>  are aggressiveness, stubbornness, suspicion of others, unpredictable mood swings, emotional instability and deformed perception of reality. Secondary DS is related to mental disorders. The direct relation of the patients' personalities to the syndrome is unclear, though the similarities in character suggest potential avenues for investigation.
Diogenes syndrome
GFER Syndrome
Koolen–De Vries syndrome
GRACILE syndrome
Katz syndrome
RAPADILINO syndrome
Rotor syndrome
Van der Woude syndrome