This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders of hair, Subject name: Dental
[{'content': 'The following patient came with history of hair loss. There were no complains of erythema, scarring and scratching. Diagnosis is? \nSelect and explain. \nA. Trichotillomania, B. Alopecia areata, C. Telogen effluvium, D. Tinea infection', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Trichotillomania Trichotillomania is a behavioural disorder characterized by compulsive hair pulling. It presents as a pattern of hair loss, often bizarre, with no clear biological or ove traumatic explanation. Hair is plucked most frequently from one fronto-parietal region. This results in a patch of hair loss, often in a bizarre or angular pattern, in which the hairs are twisted and broken at various distances from the clinically normal scalp. Differential points : Trichotillomania is not necessarily associated with erythema/ some cases do have erythema. But presence of erythema dose not rule out the diagnosis Alopecia areata will be more regular in shape and density Alopecia: - Look at the more regular patterned hair loss', 'role': 'assistant'}]