Eosinophil Count Test: A Laboratory Medicine Specialist’s Complete Guide to Interpretation The eosinophil count is a fundamental blood test that measures a specific white blood cell involved in allergic and parasitic responses. This guide covers what the test measures, how to interpret elevated or low results, normal reference ranges, and the critical pre-analytical factors that…
Understanding ECP (Eosinophil Cationic Protein): A Specialist’s Guide to Allergic Inflammation Testing What your ECP result reveals about eosinophil activation, allergic disease activity, and treatment response — explained by a Laboratory Medicine Specialist. As a Laboratory Medicine Specialist, I frequently encounter ECP requests from allergists and pulmonologists looking for answers that a simple eosinophil count…
Understanding the WBC Differential Count: A Specialist’s Complete Guide to Interpretation A comprehensive breakdown of white blood cell differential analysis — from how it’s performed to what each shift in leukocyte populations means clinically. Laboratory Medicine Specialist, MD.phD. As a Laboratory Medicine Specialist, I order and interpret hundreds of WBC differentials each week. Few tests…
CH50 Total Complement Activity Test: A Laboratory Medicine Specialist’s Complete Guide to Purpose, Method & Interpretation Written by a Laboratory Medicine Specialist (MD.phD.) Introduction As a Laboratory Medicine Specialist, I frequently receive requests to explain why CH50 is ordered alongside C3 and C4 — and why a single complement result is never enough to tell…
Weak D Test (Du Test): A Laboratory Medicine Specialist’s Complete Guide to Purpose, Interpretation & Transfusion Guidelines Written by a Laboratory Medicine Specialist (MD.phD.) Introduction The Weak D test — sometimes historically called the Du test — is one of the most clinically consequential yet frequently misunderstood assays in transfusion medicine. As a Laboratory Medicine…
Understanding Serum Amyloid A (SAA): A Specialist’s Guide to This Rapid Inflammatory Marker As a specialist in Laboratory Medicine, I closely monitor biomarkers that allow for the earliest possible detection of disease. While C-Reactive Protein (CRP) is the household name for inflammation, Serum Amyloid A (SAA) is often the “hidden gem” of the clinical lab….
HCV RNA PCR Test: A Laboratory Specialist’s Complete Guide to Results & Interpretation Everything you need to know about Hepatitis C virus PCR testing — purpose, methodology, reference values, clinical significance, and SVR12 🩺 Written by an MD, PhD — Lab Medicine Specialist Quick Summary: The HCV RNA PCR test (Real-time RT-PCR) directly detects Hepatitis…
Anti-CCP Antibody Test Explained: A Laboratory Medicine Specialist’s Guide to Rheumatoid Arthritis Diagnosis Introduction This article is written by a Laboratory Medicine Specialist (MD.phD.) with clinical expertise in autoimmune serology, immunoassay diagnostics, and rheumatological laboratory evaluation. The Anti-CCP antibody test (anti-cyclic citrullinated peptide antibody) is one of the most diagnostically powerful tools available for the…
Body Fluid Analysis: A Essential Diagnostic Tool for Identifying Infection, Inflammation, and Malignancy Key Takeaway: Body fluid analysis — encompassing cerebrospinal fluid (CSF), synovial fluid, and serous cavity fluids — is an indispensable diagnostic tool that integrates cytological, biochemical, and microbiological testing to accurately differentiate infections, inflammatory conditions, and malignancies, directly guiding clinical management. Why…
The leptin test helps evaluate metabolic, reproductive, and nutritional health. Learn its purpose, RIA method, reference ranges, and interpretation.
