Epidemiology and Clinical Significance Chronic functional constipation (CFC) affects approximately 12–27% of the general adult population, with prevalence rising sharply with age—up to 30–40% in individuals ≥65 years. It is…
Epidemiology & Pathogenesis Giardia lamblia (syn. G. duodenalis, G. intestinalis) is a flagellated protozoan parasite and a leading cause of protozoal gastroenteritis worldwide. The CDC estimates over 280 million cases…
Definition and Pathophysiology Lactose intolerance (LI) is a clinical syndrome characterized by the development of digestive symptoms following ingestion of lactose—the primary carbohydrate in mammalian milk. It results from lactose…
Definition and Disease Spectrum Microscopic colitis (MC) is a chronic, immune-mediated inflammatory disorder of the colon characterized by persistent, non-bloody, watery diarrhea, with normal-appearing mucosa on endoscopy but distinctive histopathological…
Epidemiology & Clinical Spectrum Irritable bowel syndrome (IBS) affects ~10–15% of the global population, with a 2:1 female-to-male predominance. It is classified into subtypes based on stool morphology (Bristol Stool…
Definition & Epidemiology Acute heart failure (AHF) refers to the rapid onset or acute worsening of symptoms and/or signs of heart failure (HF), typically prompting urgent medical evaluation, emergency department…
I. Definition and Classification of Severely Elevated Blood Pressure Severely elevated blood pressure (SEBP) remains a common presenting condition in emergency departments and outpatient clinics. It is critical to distinguish…
Introduction and Indications for Reversal Anticoagulation reversal is indicated in three primary clinical scenarios: Life- or limb-threatening bleeding (e.g., intracranial hemorrhage, retroperitoneal bleed, hematemesis with hemodynamic instability) Overanticoagulation with high bleeding…
Definition and Epidemiology Myocarditis is a heterogeneous group of inflammatory heart diseases characterized by myocardial inflammation in the absence of ischemic etiology, typically driven by immune-mediated mechanisms triggered by infectious,…
Epidemiology & Pathophysiology Overview Pericarditis accounts for ~5% of non–ST-elevation chest pain presentations in emergency departments. Acute pericarditis affects 1–3 cases per 1,000 person-years, with peak incidence in young to…
Epidemiology & Pathophysiology Aortic stenosis (AS) is the most common valvulopathy requiring intervention in adults in developed countries. Its prevalence increases dramatically with age: ~2% in individuals >65 years, rising…
I. Introduction: Prosthetic Valves – Purpose and Clinical Relevance Prosthetic heart valves serve to restore hemodynamic integrity in patients with severe valvular heart disease refractory to medical management. The two…
I. Introduction & Pathobiology Acute promyelocytic leukemia (APL; AML-M3, FAB classification) is a distinct, life-threatening subtype of acute myeloid leukemia (AML) accounting for 10–15% of AML cases in adults and…
Epidemiology and Pathobiology: Clinical Relevance Acute lymphoblastic leukemia (ALL) accounts for ~75% of acute leukemias in children but only ~20% in adults, with a median age at diagnosis of ~65…
Introduction and Pathophysiology Myelodysplastic syndromes (MDS) represent a heterogeneous group of clonal hematopoietic stem cell disorders characterized by: Ineffective hematopoiesis, leading to persistent peripheral blood cytopenias (anemia, neutropenia, thrombocytopenia), Dysplasia…
