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​Symptoms and Signs – Differential Diagnosis of Thyroiditis
• Factitious hyperthyroidism can mimic silent thyroiditis.
• Painful subacute thyroiditis can be mistaken for infections of the oropharynx and trachea or for suppurative thyroiditis.
• Riedel’s thyroiditis can be mistaken for carcinoma of the thyroid.
• The hyperthyroid phase of Hashimoto’s, subacute, or silent thyroiditis can be mistaken for Graves’ disease.
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​Symptoms and Signs – Differential Diagnosis of Tics
• Anxiety disorder
• Carbon monoxide poisoning
• Creutzfeldt-Jakob disease
• Encephalitis
• Head trauma
• Huntington’s disease
• Medications (e.g., antipsychotics, carbamazepine, phenytoin, phenobarbital)
• Physiologic tic
• Schizophrenia
• Stroke
• Sydenham’s chorea
• Tourette’s syndrome
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​Symptoms and Signs – Differential Diagnosis of Tinea Capitis
• Alopecia areata
• Carbuncles
• Dermatitis
• Folliculitis
• Impetigo
• Lichen ruber planus
• Lupus erythematosus
• Pediculosis
• Pseudopelade
• Psoriasis
• Pyoderma
• Seborrhea/atopic
• Traction alopecia
• Trichotillomania
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​Symptoms and Signs – Differential Diagnosis of Tinea Corporis
• Contact dermatitis
• Eczema
• Erythema multiforme
• Granuloma annulare
• Lyme disease
• Nummular eczema
• Pityriasis rosea
• Psoriasis
• Syphilis
• Systemic lupus erythematosus (SLE)
• Tinea versicolor
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