USMLE Step 1: Pathology - Organ Systems Review

# 🩺 USMLE Step 1 - Study Guide ## 📋 Course Structure ``` 🏥 Pathology ├── 📖 Chapter 1: Carcinogenesis and Lymphoid System Pathology │ ├── 🔹 Carcinogenesis: Mechanisms and Causes │ ├── 🔹 Viral-Induced Neoplasms and Chemical Carcinogenesis │ ├── 🔹 Reactive Lymphoid Hyperplasias: Types and Characteristics │ └── 🔹 Lymphomas: Classification, Diagnosis, and Staging ├── 📖 Chapter 2: Respiratory System Pathology │ ├── 🔹 COPD, Bronchitis, and Emphysema: Pathogenesis and Clinical Features │ ├── 🔹 Asthma: Etiology, Mechanisms, and Clinical Presentation │ ├── 🔹 Atelectasis: Types and Causes │ └── 🔹 Pneumonia: Classification and Etiology ├── 📖 Chapter 3: Gastrointestinal System Pathology │ ├── 🔹 Oral Cavity and Esophageal Pathology: Inflammatory and Neoplastic Lesions │ ├── 🔹 Gastric Pathology: Gastritis and Peptic Ulcer Disease │ ├── 🔹 Gastric Neoplasms: Benign and Malignant Tumors │ ├── 🔹 Intestinal Pathology: Inflammatory Bowel Disease (IBD) │ └── 🔹 Intestinal Neoplasms: Adenomas and Carcinomas ├── 📖 Chapter 4: Liver Pathology │ ├── 🔹 Viral Hepatitis: Types, Characteristics, and Serology │ ├── 🔹 Alcoholic Liver Disease: Pathogenesis and Stages │ └── 🔹 Liver Neoplasms: Benign and Malignant Tumors └── 📖 Chapter 5: Cardiovascular System Pathology ├── 🔹 Atherosclerosis: Pathogenesis and Lesion Development ├──