Disruptive mood dysregulation disorder — MCQs

A 19-year-old woman is brought to the physician by her parents because of irritable mood that started 5 days ago. Since then, she has been staying up late at night working on a secret project. She is energetic despite sleeping less than 4 hours per day. Her parents report that she seems easily distracted. She is usually very responsible, but this week she spent her paycheck on supplies for her project. She has never had similar symptoms before. In the past, she has had episodes where she felt too fatigued to go to school and slept until 2 pm every day for 2 weeks at a time. During those times, her parents noticed that she cried excessively, was very indecisive, and expressed feelings of worthlessness. Two months ago, she had an asthma exacerbation and was treated with bronchodilators and steroids. She tried cocaine once in high school but has not used it since. Vital signs are within normal limits. On mental status examination, she is irritable but cooperative. Her speech is pressured and her thought process is linear. Which of the following is the most likely diagnosis?

A mother brings her 3-year-old son to the doctor because she is worried that he might be harming himself by constantly banging his head on the wall. He has been exhibiting this behavior for a few months. She is also worried because he has started to speak less than he used to and does not respond when his name is called. He seems aloof during playtime with other children and seems to have lost interest in most of his toys. What is the most likely diagnosis?

A 25-year-old woman comes to the physician because of sadness that started 3 weeks after her daughter was born. Her daughter is now 9 months old and usually sleeps through the night, but the patient still has difficulty staying asleep. She has not returned to work since the birth. She is easily distracted from normal daily tasks. She used to enjoy cooking, but only orders delivery or take-out now. She says that she always feels too exhausted to do so and does not feel hungry much anyway. The pregnancy of the patient's child was complicated by gestational diabetes. The child was born at 36-weeks' gestation and has had no medical issues. The patient has no contact with the child's father. She is not sexually active. She does not smoke, drink alcohol, or use illicit drugs. She is 157 cm (5 ft 1 in) tall and weighs 47 kg (105 lb); BMI is 20 kg/m2. Vital signs are within normal limits. She is alert and cooperative but makes little eye contact. Physical examination shows no abnormalities. Which of the following is the most likely diagnosis?

A 15-year-old boy is brought to the clinic by his father for complaints of “constant irritation.” His father explains that ever since his divorce with the son’s mother last year he has noticed increased irritability in his son. "He has been skipping out on his baseball practices which he has always enjoyed,” his dad complains. After asking the father to step out, the patient reports trouble concentrating at school and has been staying up late “just thinking about stuff.” When probed further, he states that he “feels responsible for his parents' divorce because he was being rebellious.” What is the best treatment for this patient at this time?

A 31-year-old female presents to her primary care physician with mild anxiety and complaints of mood swings lasting several months. The patient reports that the mood swings affect her work and personal relationships. In addition, she complains of increased irritability, breast tenderness, bloating, fatigue, binge-eating, and difficulty concentrating for 10 days prior to her menstrual period. The patient's symptoms increase in severity with the approach of menses but resolve rapidly on the first day of menses. She states that she is very sensitive to criticism of her work by others. She also snaps at her children and her husband. She has tried yoga to unwind, but with limited improvement. She is concerned that her behavior is affecting her marriage. The patient has no past medical history, and has regular periods every 24 days. She has had two normal vaginal deliveries. She uses condoms for contraception. Her mother has major depressive disorder. The physical exam is unremarkable. What is the most appropriate next step in the treatment of this patient?

A 29-year-old man comes to the physician with his wife because she has noticed a change in his behavior over the past 2 weeks. His wife reports that he is very distracted and irritable. His colleagues have voiced concerns that he has not been turning up for work regularly and behaves erratically when he does. Previously, her husband had been a reliable and reasonable person. The patient says that he feels “fantastic”; he only needs 4 hours of sleep each night and wakes up cheerful and full of energy each morning. He thinks that his wife is overreacting. The patient has been healthy except for a major depressive episode 5 years ago that was treated with paroxetine. He currently takes no medications. His pulse is 98/min, respirations are 12/min, and blood pressure is 128/62 mm Hg. Mental status examination shows frenzied speech and a flight of ideas. Which of the following is the strongest predisposing factor for this patient's condition?

An 11-year-old boy’s parents brought him to a psychologist upon referral from the boy’s school teacher. The boy frequently bullies his younger classmates despite having been punished several times for this. His mother also reported that a year prior, she received complaints that the boy shoplifted from local shops in his neighborhood. The boy frequently stays out at night despite strict instructions by his parents to return home by 10 PM. Detailed history reveals that apart from such behavior, he is usually not angry or irritable. Although his abnormal behavior continues despite warnings and punishments, he neither argues with his parents nor teachers and does not display verbal or physical aggression. Which of the following is the most likely diagnosis?

A 15-year-old boy is referred to a child psychologist because of worsening behavior and constant disruption in class. He has received multiple reprimands in the past 6 months for not doing the homework his teacher assigned, and he refuses to listen to the classroom instructions. Additionally, his teachers say he is very argumentative and blames other children for not letting him do his work. He was previously well behaved and one of the top students in his class. He denies any recent major life events or changes at home. His past medical history is noncontributory. His vital signs are all within normal limits. Which of the following is the most likely diagnosis?

A parent-teacher conference is called to discuss the behavior of a 9 year-old boy. According to the boy's teacher, he has become progressively more disruptive during class. When asked to help clean up or read out-loud, he replies with "You're not the boss of me." or "You can't make me." He refuses to participate in gym class, but will play the same games during recess. He gets along with and is well-liked by his peers. His mother reports that her son can "sometimes be difficult," but he is helpful around the house and is very good playing with his 7-year-old sister. What is the most likely diagnosis?

An 8-year-old boy is brought to his pediatrician by his mother because she is worried about whether he is becoming ill. Specifically, he has been sent home from school six times in the past month because of headaches and abdominal pain. In fact, he has been in the nurse's office almost every day with various symptoms. These symptoms started when the family moved to an old house in another state about 2 months ago. Furthermore, whenever he is taken care of by a babysitter he also has these symptoms. Despite these occurrences, the boy never seems to have any problems at home with his parents. Which of the following treatments would likely be effective for this patient?