Clinical Vignette
Patient: "Mr. R," 43-year-old software engineer, self-referred reporting 'out of control eating' that has caused 80-pound weight gain over 5 years.
Chief Concern: "I eat uncontrollably 3-4 nights a week. I eat until I'm in physical pain. I eat huge amounts even when I'm not hungry. I'm disgusted with myself afterward. I've gained 80 pounds. I don't throw up or exercise to compensate — I just stack the weight."
History of Present Illness: Mr. R reports a 5-year pattern of binge eating episodes occurring 3-4 times weekly, typically in the evening after work. A typical binge consists of: ordering 2-3 full meals from delivery services, consuming an entire family-size bag of chips, a pint of ice cream, and additional snacks, totaling an estimated 5,000-8,000 calories in a 2-hour period. He eats rapidly, often while standing or pacing. He continues eating past fullness to the point of physical discomfort or pain. He eats alone due to embarrassment about the quantity consumed. Afterward, he feels intense disgust, guilt, and depression. He has gained 80 pounds over 5 years (current BMI 38). He does NOT engage in any compensatory behaviors: no vomiting, no laxative use, no excessive exercise, no subsequent fasting. He has attempted numerous diets, all of which fail when binge episodes resume. He associates his binges with work stress, loneliness, and boredom, but binges also occur on days without identifiable triggers.
Past Psychiatric History: No prior psychiatric treatment. Has attended one commercial weight loss program.
Family History: Mother: obesity. Sister: BN (purging type).
Mental Status Exam: Obese (BMI 38). Casually dressed. Cooperative, emotionally open. Speech normal. Mood 'ashamed.' Affect sad when discussing eating behavior. Thought process logical. Content: distress about eating and weight. Self-criticism prominent. No psychotic symptoms. No suicidal ideation. Insight good.
Step 1: BED DSM-5-TR Criteria
Criterion A: Recurrent episodes of binge eating. Episode characterized by: (1) eating a definitely larger amount of food in a discrete period than most people would under similar circumstances, (2) sense of lack of control over eating.
(1) 5,000-8,000 calories in 2 hours (objectively large, far exceeding normal meal). (2) Describes episodes as 'uncontrollable' — cannot stop despite wanting to. MET.
Criterion B: Binge episodes associated with ≥3 of: (1) eating much more rapidly, (2) eating until uncomfortably full, (3) eating large amounts when not hungry, (4) eating alone due to embarrassment, (5) feeling disgusted/depressed/guilty afterward.
(1) Eats rapidly while standing/pacing. (2) Eats to physical pain. (3) Binges regardless of hunger. (4) Eats alone, orders delivery to avoid being seen buying large quantities. (5) Intense disgust, guilt, depression after binge. 5/5 present. MET (5/5).
Criterion C: Marked distress regarding binge eating.
'I'm disgusted with myself.' 'I'm ashamed.' Distress is prominent and genuine. MET.
Criterion D: At least once a week for 3 months.
3-4 times weekly for 5 years. MET — far exceeds threshold.
Criterion E: Not associated with recurrent compensatory behaviors (as in BN) and does not occur exclusively during AN or BN.
No vomiting, no laxatives, no excessive exercise, no fasting. Weight gain reflects the absence of compensation. MET — no compensatory behaviors.
Step 2: BED vs. Overeating Without Disorder
| Feature | Binge Eating Disorder | Overeating (No Disorder) | Bulimia Nervosa | This Patient |
|---|---|---|---|---|
| Sense of control | Loss of control (defining feature) | May overeat but feels in control | Loss of control | BED: 'uncontrollable' |
| Distress | Marked distress required | May or may not feel distress | Distress present | BED: marked distress |
| Compensatory behavior | ABSENT (defining absence) | Not applicable | PRESENT (defining feature) | BED: no compensation |
| Frequency | ≥1x/week for 3 months | Variable, not patterned | ≥1x/week for 3 months | 3-4x/week for 5 years |
| Weight | Often overweight/obese | Variable | Often normal weight | BMI 38 (obese) |
Severity
DSM-5-TR BED severity based on weekly binge frequency: Mild (1-3), Moderate (4-7), Severe (8-13), Extreme (≥14). Mr. R's 3-4 episodes/week places him at mild to moderate severity. The 80-pound weight gain reflects cumulative caloric surplus without compensation.
Diagnostic Formulation
Diagnostic Conclusion
Binge Eating Disorder, Moderate (F50.81): All 5 DSM-5-TR criteria met. All 5 Criterion B associated features present. Five-year duration, 3-4 episodes/week. No compensatory behaviors. Significant medical consequence (BMI 38, obesity-related risks). Treatment: CBT-E (first-line) or IPT (interpersonal therapy — targets emotional triggers). Lisdexamfetamine (Vyvanse) is the only FDA-approved medication for BED. Weight management should be addressed AFTER eating disorder stabilization, not concurrently.
Teaching Points
- BED is the most common eating disorder, more prevalent than AN and BN combined. It was added as a full diagnosis in DSM-5 (previously in DSM-IV as a research criteria set). Recognition is improving but many clinicians still fail to identify BED, particularly in males and older adults.
- The ABSENCE of compensatory behaviors is the defining feature that separates BED from BN. Both involve binge eating with loss of control; BN adds purging/compensation, BED does not. This distinction determines treatment approach.
- BED and obesity are related but distinct conditions. Most individuals with BED are overweight or obese, but most obese individuals do NOT have BED. Obesity does not equal BED. The key distinction is the loss of control and marked distress — features absent in simple overeating.
- Lisdexamfetamine (Vyvanse) is the only FDA-approved pharmacological treatment for BED. It is a prodrug stimulant that reduces binge frequency. It carries abuse potential and is contraindicated in patients with stimulant use disorders or cardiac conditions.
- Weight loss should NOT be the initial treatment focus for BED. Addressing eating disorder psychopathology first (loss of control, emotional eating patterns, distress) is more effective. Premature focus on weight loss increases dietary restriction, which paradoxically triggers more binges.