Differential Diagnosis of Acne Keloidalis
Differential Diagnosis of Acne Keloidalis • Traumatic causes of keloid • Simple ingrowing hairs (pili incarnati) • Pseudofolliculitis • Pediculosis capitis • Nevus sebaceus • Folliculitis • Acne vulgaris
Differential Diagnosis of Acne Vulgaris
Differential Diagnosis of Acne Vulgaris • Steroid acne • Staphylococcal pyoderma • Sebaceous hyperplasia • Occupational exposures to oils or grease • Gram-negative folliculitis • Flat warts • Drug eruption • Angiofibromas, basal cell carcinomas, osteoma c
Differential Diagnosis of Acoustic Neuroma
Differential Diagnosis of Acoustic Neuroma • Vertebrobasilar insufficiency • Trigeminal neuralgia • Presbycusis • Ototoxicity from medications • Other tumors: meningioma, glioma, facial nerve schwannoma, cavernous hemangioma, metastatic tumors • Normal-pr
Differential Diagnosis of Acquired Immunodeficiency Syndrome (AIDS)
Differential Diagnosis of Acquired Immunodeficiency Syndrome (AIDS) • TB • Other wasting illnesses mimicking the nonspecific features of AIDS • Other disorders associated with dementia or demyelination producing encephalopathy, myelopathy, or neuropathy •
Differential Diagnosis of Acrochordon
Differential Diagnosis of Acrochordon • Wart • Seborrheic keratosis • Neurofibroma • Melanoma • Melanocytic nevus • Dermatosis papulosa nigra
Differential Diagnosis of Acromegaly
Differential Diagnosis of Acromegaly • Ectopic production of growth hormone–releasing hormone (GHRH) from carcinoid, other neuroendocrine tumor • Pituitary neoplasm
Differential Diagnosis of Actinic Keratosis
Differential Diagnosis of Actinic Keratosis • Wart • Seborrheic keratosis • Lichenoid keratosis • Heavily pigmented variants may be clinically mistaken for lentigo maligna • Eczema • Cutaneous lupus • Bowen’s disease (intraepithelial carcinoma) • Basal ce
Differential Diagnosis of Actinomycosis
Differential Diagnosis of Actinomycosis • Other causes of acute, subacute, or chronic infections of the lung, abdomen, hepatic, gastrointestinal (GI), genitourinary (GU), musculoskeletal, and CNS systems • Nocardiosis • Intestinal tuberculosis • Crohn’s d
Differential Diagnosis of Acute Bronchitis
Differential Diagnosis of Acute Bronchitis • Sinusitis • Pneumonia • Pharyngitis • Neoplasm (elderly patients) • Influenza • Gastroesophageal reflux disease (GERD) • Cystic fibrosis • Cough secondary to medications • Congestive heart failure (CHF) (in eld
Differential Diagnosis of Acute Respiratory Distress Syndrome (ARDS)
Differential Diagnosis of Acute Respiratory Distress Syndrome (ARDS) • Viral pneumonitis • Lymphangitic carcinomatosis • Cardiogenic pulmonary edema
