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Relationship of CD4 Count to Development of Opportunistic Infections
Renal Stones
Rest and 24-Hour Redistribution Thallium-201 (201tl) Single-Photon Emission CT (Spect) Myocardial Perfusion Imaging (Mpi) of a 75-Year-Old Man with Atypical Angina Showing a Large Amount of Resting Ischemia in the Left Anterior Descending Coronary Artery (LAD)
Retinal Embolus (Arrow)
Rheumatoid Nodules over the Extensor Surface of the Forearm
Right Bundle Branch Block
Role of Cobalamin (Vitamin B12) and Folic Acid in Nucleic Acid and Myelin Metabolism
Romaña Sign
Radiograph of the Left Thumb Shows Loss of the Joint Space Between the Proximal Thumb Metacarpal and the Trapezium Bone
Radiograph Shows Two Dense 1-cm Calcifications (Arrows) Projecting over the Mid-Portion of the Left Kidney Consistent with Kidney Stones
Rash of Hand, Foot, and Mouth Disease
Relative Afferent Pupillary Defect
Representative Spirograms (Upper Panel) and Expiratory Flow-Volume Curves (Lower Panel) for Normal (A), Obstructive (B), and Restrictive (C) Patterns
Retinal Changes in HIV Infection: Cytomegalovirus Retinitis with Hemorrhages and Retinal Whitening
Rheumatoid Arthritis
Right Atrial Enlargement (Rae) and Rvh
Risk Index for Material Cardiac Complications in Pregnancy (Carpreg II)
Role of Obesity in the Pathophysiology of Weight-Related Diseases
Rosacea in a 34-Year-Old Woman Showing Erythema, Papules, and Pustules Covering Much of the Face
Radiation-Induced Pulmonary Fibrosis
Radiograph of the Lumbar Spine of a Different Patient, Demonstrating Shiny Corners (Romanus Lesions) (Arrows)
Radiographs of Index Finger of a Patient before (Left) and after (Right) Plasma Phosphate Was Reduced to Normal with Aluminum Hydroxide Gel and 6 Months of Dialysis Against a Bath of 8 mg/dL Calcium
RBC Cast
Rectocele (Also Known as Posterior Vaginal Prolapse), (A
Refractory (Clonal) Anemia with Ringed Sideroblasts
Raynaud Phenomenon of the Hands Characterized by Paroxysmal Bilateral Digital Pallor and Cyanosis Followed by Rubor; Early in Attacks, Only One or Two Fingertips May be Affected but as It Progresses, All Fingers Down to the Distal Palm May be Involved
Receiver Operator Characteristic (ROC) Curves for PSA and Prostatic Acid Phosphatase (PAP) in the Diagnosis of Prostate Cancer
Recurrent Oral Aphthous Stomatitis
Relationship Between Accuracy and Precision in Diagnostic Tests
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