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The United States Medical Licensing Examination (USMLE) Step 1 is a computer-based test that assesses whether medical students or graduates can apply important concepts of the foundational sciences fundamental to the practice of medicine. The exam consists of 280 multiple-choice questions, divided into seven 40-question blocks, and takes eight ...
Pathophysiology (or physiopathology) is a branch of study, at the intersection of pathology and physiology, concerning disordered physiological processes that cause ...
Valentino's syndrome is pain presenting in the right lower quadrant of the abdomen caused by a duodenal ulcer with perforation through the retroperitoneum. [1]It is named after Rudolph Valentino, an Italian actor, who presented with right lower quadrant pain in New York, which turned out to be a perforated peptic ulcer.
Complex regional pain syndrome (CRPS Type 1 and Type 2), sometimes referred to by the hyponyms Reflex Sympathetic Dystrophy (RSD) or Reflex Neurovascular Dystrophy (RND), is a rare and severe form of neuroinflammatory and dysautonomic disorder causing chronic pain, neurovascular, and neuropathic symptoms.
The pathophysiology is varied, and each NF type has a different one: Neurofibromatosis type I is the most common of the three types and is caused by genetic changes in the NF1 gene located on chromosome 17 (17q11.2).
Still, it is widely used in clinical practice, probably because of its historical role prior to the availability of more reliable diagnostic studies (such as a D-dimer titration or a Doppler ultrasound), as well the ease of eliciting it. [4] An elevated D-dimer in the elderly population has no predictive value for deep venous thrombosis.
A positive Pemberton's sign is indicative of superior vena cava syndrome (SVC), commonly the result of a mass in the mediastinum.Although the sign is most commonly described in patients with substernal goiters where the goiter "corks off" the thoracic inlet, [4] the maneuver is potentially useful in any patient with adenopathy, tumor, or fibrosis involving the mediastinum.
Animal testing remains a controversial practice, even in cases where it is used to research treatment for human disease. [34] As in human medical pathology, the practice of veterinary pathology is customarily divided into the two main fields of anatomical and clinical pathology. A tobacco plant infected with the tobacco mosaic virus