Epidemiology & Pathogenesis CMML is a clonal hematopoietic stem cell disorder classified under the myelodysplastic/myeloproliferative neoplasm (MDS/MPN) overlap syndromes. It exhibits features of both dysplasia and proliferation, with characteristic persistent…
Definition & Clinical Spectrum Angioedema (AE) is characterized by acute, self-limiting swelling of the dermis, subcutaneous tissue, and/or mucosal layers, typically involving the face (lips, cheeks, periorbital), upper airway (tongue,…
I. Definition, Epidemiology, and Conceptual Framework Burnout is not a formal psychiatric diagnosis per the DSM-5-TR or ICD-11 but is formally recognized in the ICD-11 as an occupational phenomenon under…
Pathophysiology & Epidemiology – Clinical Relevance Benign prostatic hyperplasia (BPH) is a histopathological diagnosis defined by stromal and epithelial proliferation within the prostatic transition zone—the anatomical region encircling the urethra.…
I. Definition & Epidemiology: Clinical Relevance Erectile dysfunction (ED) is defined as the persistent inability to attain or maintain a penile erection of sufficient rigidity and duration to permit satisfactory…
I. Pathophysiology & Clinical Spectrum Ehlers-Danlos syndrome (EDS) is a heterogeneous group of inherited connective tissue disorders caused by defects in collagen synthesis, processing, or structure—most commonly COL1A1, COL1A2, COL3A1,…
Epidemiology & Pathophysiology Spina bifida (SB) is a spectrum of congenital neural tube defects (NTDs) resulting from failed or incomplete closure of the neural tube between days 26–28 post-conception. Incidence…
I. Pathophysiology and Clinical Significance Obstructive sleep apnea (OSA) is a highly prevalent, underdiagnosed, and underrecognized chronic disorder characterized by repetitive collapse of the upper airway during sleep, despite ongoing…
I. Epidemiology & Pathophysiology: Clinical Relevance Restless Legs Syndrome (RLS), or Willard-Ekbom disease, is a common sensorimotor neurologic disorder affecting ~5–10% of adults and 2–4% of children in Western populations,…
Prepared for practicing clinicians—updated to reflect 2023–2024 guidelines from the American College of Physicians (ACP), American Pain Society, North American Spine Society (NASS), Cochrane Database Reviews, and the 2024 updated…
I. Epidemiology & Pathogenesis: Beyond Surface Symptoms Acne vulgaris is a chronic, inflammatory disease of the pilosebaceous unit affecting up to 85% of adolescents and 12–24% of adult women (≤45…
I. Definitions and Pathophysiologic Context Understanding hair removal requires precise terminology grounded in dermatopathology and endocrinology: TermDefinitionClinical RelevanceDepilationRemoval of the hair shaft only, typically via chemical (e.g., thioglycolate-based depilatories) or mechanical…
1. Introduction & Filler Classification Dermal fillers are injectable biomaterials used primarily for soft-tissue augmentation, volume restoration, and wrinkle correction—both cosmetically and reconstructively (e.g., HIV-associated lipoatrophy, post-traumatic or postsurgical contour…
1. Introduction & Definition Cosmetic skin resurfacing refers to a spectrum of minimally invasive, energy- or agent-based interventions designed to treat epidermal and/or dermal pathology by inducing controlled injury, thereby…
I. Patient Selection: A Critical First Step Botulinum toxin (BoNT) remains one of the most effective and minimally invasive treatments for dynamic facial rhytides, with over 7 million cosmetic procedures…
