Depressed mood: Differential Diagnosis by Symptom Pattern

Clinical differential layer built from symptom-to-condition entities. This page maps 12 associated conditions across 6 clinically distinct groups.

Diagnostic value score: 30

Top Condition Groups Causing This Symptom

Endocrine and Metabolic

3 linked conditions

•Subacute/chronic course with metabolic trigger profile
•Weight, appetite, and temperature regulation changes
•Lab pattern consistency across repeated tests

Adrenal Insufficiency Iodine Deficiency Hyperparathyroidism

General Internal Medicine

2 linked conditions

•Prioritize red flags and severe progression first
•Use focused history + exam to define the leading organ system

Vitamin B12 Deficiency Burnout Syndrome

Mental Health

2 linked conditions

•Temporal relationship with psychosocial stressors
•Sleep, concentration, and mood triad
•Need to exclude organic causes before attribution

Depression Premenstrual Dysphoric Disorder (PMDD)

Gastrointestinal

1 linked conditions

•Pain location and relation to meals
•Stool pattern (watery, bloody, greasy) and vomiting profile
•Associated systemic signs such as fever or jaundice

Hypothyroidism

Musculoskeletal and Autoimmune

1 linked conditions

•Mechanical vs inflammatory pain profile
•Morning stiffness and functional pattern
•Joint distribution and systemic autoimmune clues

Vitamin D Deficiency

How Doctors Distinguish Likely Causes

→Subacute/chronic course with metabolic trigger profile
→Weight, appetite, and temperature regulation changes
→Lab pattern consistency across repeated tests
→Prioritize red flags and severe progression first
→Use focused history + exam to define the leading organ system
→Temporal relationship with psychosocial stressors
→Sleep, concentration, and mood triad
→Need to exclude organic causes before attribution
→Pain location and relation to meals
→Stool pattern (watery, bloody, greasy) and vomiting profile

Common Causes

Depression Hypothyroidism Premenstrual Dysphoric Disorder (PMDD)Vitamin B12 Deficiency Adrenal Insufficiency Alzheimer's Disease Burnout Syndrome Iodine Deficiency Vitamin D Deficiency Hyperparathyroidism

Urgent Causes

No high-signal entries available for this block.

Dangerous but Less Common

No high-signal entries available for this block.

What Changes the Differential

Age modifiers

•Age changes baseline risk: pediatric, adult, and older patients have different top causes.

Severity and acuity

•Escalating severity, hemodynamic instability, or neurologic compromise should always override watchful waiting.

Timing and pattern

•Timing matters: onset speed, duration, and recurrence pattern help separate benign from high-risk causes.

Associated symptoms

•Associated symptom clusters (e.g., Depressed mood + Fatigue, Depressed mood + Poor Memory, Depressed mood + Weight Gain) materially alter the differential.

When Testing Is Needed

Immediate testing when red flags are present

•Focused examination with baseline labs if symptoms persist
•Escalate to urgent workup when red flags appear

Group-directed workup

•Glucose / HbA1c
•TSH and thyroid hormones
•Electrolyte panel
•Kidney and liver function
•Structured clinical assessment
•Basic metabolic screen
•Medication/substance review
•Sleep and mental-health questionnaires

Most Relevant Conditions

Condition Differential Analyses

🔬Hyperparathyroidism: differential →🔬Alzheimer's Disease: differential →🔬Vitamin D Deficiency: differential →🔬Depression: differential →🔬Hypothyroidism: differential →

Linked Differential Network

Condition Pages

Condition vs Condition Pages

Depression vs Hypothyroidism Hyperparathyroidism vs Vitamin D Deficiency Burnout Syndrome vs Depression

Symptom Combo Pages

Context and Red-Flag Links

No context pages linked for this symptom.

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Medical References

Content on this page is informed by evidence-based clinical sources including:

World Health Organization (WHO)Global health guidance and disease classification
National Health Service (NHS)UK clinical guidelines and patient information
National Institute for Health and Care Excellence (NICE)Evidence-based clinical practice guidelines
Centers for Disease Control and Prevention (CDC)US public health data and clinical recommendations
PubMed – NCBIPeer-reviewed biomedical literature and clinical studies
Cochrane LibrarySystematic reviews and meta-analyses in evidence-based medicine