ABCDE approach. Airway comes first. Tension pneumothorax = needle compression before x-ray.

Appendicitis = McBurney's point tenderness. Cholecystitis = Murphy's sign, USG is best.

Direct = medial to inferior epigastric vessels. Indirect = lateral, through deep ring.

Breast cancer: Invasive ductal is most common. Fibroadenoma: Mouse of breast.