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Foundation Sciences · Histology

Adrenal Gland Histology

⏱️ 45–60 minutes read 📖 Histology

Cortex zones (glomerulosa, fasciculata, reticularis) and medulla (chromaffin cells).

📌 Learning Objectives

  • Describe the key principles of adrenal gland histology.
  • Explain the clinical relevance of adrenal gland histology.
  • Recognise common conditions linked to adrenal gland histology in MLA-style scenarios.

📋 Overview

Cortex zones (glomerulosa, fasciculata, reticularis) and medulla (chromaffin cells). This topic integrates with pathology, pharmacology and clinical medicine and is frequently tested in UK medical school exams and the MLA.

🔬 Basic Science

Cortex zones (glomerulosa, fasciculata, reticularis) and medulla (chromaffin cells). Detailed mechanisms, regulation and molecular interactions underpin both normal physiology and disease.

🏥 Clinical Relevance

Addison's, Cushing's, Conn's, CAH, phaeochromocytoma, neuroblastoma.

🧪 Investigations

Relevant laboratory tests, imaging or histological examination are used as appropriate to the clinical context.

💊 Management

Management is condition-specific; principles include addressing the underlying biochemical/structural derangement, supportive care and targeted therapy where available.

Revision Resources – expand the sections below for high-yield notes, exam pearls, key facts and further reading.

🎯 MLA High-Yield Notes & Quick Revision ⌄
High-yield topic for the UK MLA — frequently appears in SBA questions linking histology concepts to clinical presentations and management decisions.
Applying biomedical science to clinical practice Diagnosis and investigation Pathophysiology of common conditions
  • Cortex zones (glomerulosa, fasciculata, reticularis) and medulla (chromaffin cells).
⭐ Exam Pearls ⌄
⭐ High Yield
GFR → Salt, Sugar, Sex; the deeper you go the sweeter it gets
Fasciculata: lipid-rich, foamy cells
Medulla: catecholamines, chromaffin reaction
💡 Clinical Pearl
: Addison's, Cushing's, Conn's, CAH, phaeochromocytoma, neuroblastoma.
⚠️ Exam Tip — Common Mistakes
Confusing adrenal gland histology with related but distinct mechanisms.
Memorising pathways without linking to clinical disease.
🔑 Key Facts ⌄
GFR → Salt, Sugar, Sex; the deeper you go the sweeter it gets
Fasciculata: lipid-rich, foamy cells
Medulla: catecholamines, chromaffin reaction
📚 References ⌄
  1. BMJ Best Practice
  2. Robbins Basic Pathology
  3. Lippincott Illustrated Reviews: Biochemistry
  4. Wheater's Functional Histology
  5. NICE guidance where applicable.

Further Resources

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