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Neuropathic Arthropathy (Charcot Joint) from Tertiary Syphilis
Neuropathic Foot Ulcer in a Patient with Diabetes
Nomogram for Determining Posttest Probability from Pretest Probability and LRs
Nomogram for Prediction of Acetaminophen Hepatotoxicity Following Acute Overdosage
Nonalcoholic Steatohepatitis (NASH)
Noncontrast CT Image of a Subacute Left Middle Cerebral Artery Infarct (Arrows)
Nonpalpable Purpura
Nonproliferative Diabetic Retinopathy with Hard Exudates Indicative of Macular Edema Extending into the Central Macula
Normal Appearing Z Line: the Junction of Squamous Esophageal Mucosa and Columnar Gastric Mucosa
Normal Karyotype of a Human Male
Normal Lung Perfusion
Normal Lung Ventilation with Xenon-133
Normal Peripheral Blood Smear
Normal Pressures and Waveforms Obtained as a Pulmonary Artery Flotation Catheter is Advanced from the Right Atrium to a Pulmonary Artery Wedge Position
Normal Sinus Rhythm with First-Degree Atrioventricular (AV) Block
Nummular Dermatitis
Nutritional Support Method Decision Tree
Onycholysis (Separation of the Nail from its Bed) in Graves Disease Usually Resolves Spontaneously as the Patient Improves
Onychomycosis Involving Digits 1, 2, and 5
Optic Disk Neovascularization in Proliferative Diabetic Retinopathy (A) and with Preretinal Hemorrhage (Arrow, B)
Optic Disk Swelling with Hemorrhages and Pallor due to Anterior Ischemic Optic Neuropathy
Oral Hairy Leukoplakia on the Side of the Tongue in AIDS
Oral Mucosal Candidiasis
Orbital Cellulitis
Orolabial Herpes Simplex Showing Deroofed Blisters (Ulcer)
Osteitis Fibrosa Cystica with Resorption of the Distal Phalanges
Osteoarthritis in an Older Woman with Heberden Nodes at the Distal Interphalangeal Joints
Osteoarthritis with Joint Space Narrowing of Both the Distal Interphalangeal Joints and the Proximal Interphalangeal Joints of the Left Hand
Osteoarthritis with Medial Compartment Narrowing of Both Knees
Osteosarcoma
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