Age-specific, gender-specific, and, for females, menstrual cycle phase–specific reference intervals have been established for follicle-stimulating hormone (FSH). However, depending on the laboratory ...

Third-degree atrioventricular (AV) block, also referred to as third-degree heart block or complete heart block (CHB), is characterized by complete failure of atrial electrical impulses to reach the ...

Author: Arnold S Baas, MD, FACC, FACP; Chief Editor: Yasmine S Ali, MD, MSCI, FACC, FACP more ...

Table 1. TNM Classification for Pancreatic Cancer (Open Table in a new window) Tumor limited to the pancreas, ≤2 cm in greatest dimension T1a - Tumor ≤0.5 cm in greatest dimension T1b - Tumor >0.5 cm ...

The most common presentation is an acute, symmetric, exanthematous, asymptomatic cutaneous eruption that develops over several days. (See the image below.) The eruption typically lasts at least 10 ...

Author: BS Anand, MD; Chief Editor: BS Anand, MD more... Long-term supportive management focuses on the elimination of environmental and lifestyle factors that impair the defense mechanisms of the ...

Transudative effusion occurs when fluid permeates the pleural cavity via intact pulmonary vessels, often in association with conditions such as congestive heart failure (CHF). [2, 3] Exudative ...

The American Society of Anesthesiologists (ASA) Physical Status Classification System is a risk-stratifying system used mainly by anesthesiologists to help predict preoperative risks; it has been in ...

Author: Bishnu Prasad Devkota, MD, MHI, FRCS(Edin), FRCS(Glasg), FACP, FAMIA; Chief Editor: Sridevi Devaraj, PhD, DABCC, FAACC, FRSC, CCRP more ...

Sections Urine Specific Gravity: Reference Range, Interpretation, Collection, and Panels ...

Author: Chris G Adigun, MD, FAAD; Chief Editor: Dirk M Elston, MD more ...

The following organizations have released guidelines for the management of psychogenic nonepileptic seizures (PNES). Key diagnostic and treatment recommendations have been reviewed and integrated ...