During a community eye screening camp in rural India, a 58-year-old woman with longstanding hypertension is found to have retinal hemorrhages on fundoscopy. Which of the following is the most common type of hemorrhage seen in hypertensive retinopathy?

## Most Common Type of Hemorrhage in Hypertensive Retinopathy ### Classification of Retinal Hemorrhages by Location and Morphology | Hemorrhage Type | Location | Appearance | Cause | Frequency in HTN | |-----------------|----------|-----------|-------|------------------| | **Flame-shaped** | Nerve fiber layer (superficial) | Linear, flame-like, follows nerve fiber bundles | Arteriolar rupture | **Most common** | | **Dot-and-blot** | Inner nuclear & outer plexiform layers (deep) | Round, small dots or larger blots | Capillary rupture | Less common in HTN | | **Subretinal** | Beneath RPE (very deep) | Large, dark, elevated | Choroidal vessel rupture | Rare in HTN | | **Vitreous** | Vitreous cavity | Obscures view, floaters | Neovascular rupture | Rare in uncomplicated HTN | ### Why Flame-Shaped Hemorrhages Predominate in Hypertensive Retinopathy **Key Point:** **Flame-shaped hemorrhages are the most common hemorrhagic manifestation** of hypertensive retinopathy because they arise from rupture of **superficial arterioles** in the nerve fiber layer, which are the primary target of hypertensive vascular injury. ### Pathophysiology 1. **Acute hypertensive injury** → arteriolar wall necrosis (acute arteriolitis) 2. **Loss of autoregulation** → forced vasodilation and increased intravascular pressure 3. **Arteriolar rupture** in the superficial nerve fiber layer 4. **Linear hemorrhage** follows the course of nerve fiber bundles → flame shape **High-Yield:** The **distribution pattern of flame hemorrhages** (radiating from the optic disc along nerve fiber bundles) is characteristic and helps differentiate hypertensive retinopathy from diabetic retinopathy, which favors dot-and-blot hemorrhages. ### Hypertensive Retinopathy Hemorrhage Hierarchy **Mnemonic:** **FLAME** (Flame-shaped, Lipid exudates, Arteriolar narrowing, Macular edema, Edema of disc) - **Flame** = most common hemorrhage type - Appear early in hypertensive retinopathy - Resolve over weeks without permanent scarring - Indicate acute vascular decompensation **Clinical Pearl:** The presence of flame-shaped hemorrhages with cotton-wool spots and hard exudates in a hypertensive patient signals **Grade 3 (severe) hypertensive retinopathy** and warrants urgent antihypertensive therapy to prevent progression to hypertensive retinopathy with papilledema (Grade 4, malignant hypertension). ### Why Other Options Are Less Common - **Dot-and-blot hemorrhages** are more typical of diabetic retinopathy (capillary rupture in deeper layers) - **Subretinal hemorrhages** require rupture of choroidal vessels, which is rare in uncomplicated hypertensive disease - **Vitreous hemorrhages** occur only in advanced proliferative disease or with neovascularization, not in typical hypertensive retinopathy [cite:Parson's Diseases of the Eye 22e Ch 12]