**Question:** Which of following is not a feature in diabetic retinopathy on fundus examination

A. Hyperpigmentation
B. Microaneurysms
C. Exudates
D. Neovascularization

**Core Concept:** Diabetic retinopathy is a complication of diabetes mellitus that affects the blood vessels in the retina, leading to various morphological changes on fundus examination. These changes include hyperpigmentation, microaneurysms, exudates, and neovascularization.

**Why the Correct Answer is Right:** Neovascularization is the formation of new blood vessels in the retina, which is a characteristic feature of diabetic retinopathy. This refers to the development of abnormal blood vessels that grow into the vitreous humor or on the surface of the retina, leading to complications like bleeding, leakage, and scarring.

**Why Each Wrong Option is Incorrect:**

A. Hyperpigmentation refers to the increased pigmentation in the retina, which is not a specific feature of diabetic retinopathy. It can occur due to various other ocular conditions or systemic factors, making it irrelevant to the correct answer.

B. Microaneurysms are dilated and enlarged blood vessels that can be seen in diabetic retinopathy. They are considered a feature of the disease and are different from neovascularization.

C. Exudates are fluid-filled or hemorrhagic spots in the retina that occur due to leakage from dilated blood vessels. Exudates are also a feature of diabetic retinopathy but are different from neovascularization.

**Clinical Pearl:** A thorough understanding of the morphological changes in diabetic retinopathy is crucial for proper diagnosis and management of the disease. Fundus examination is a vital tool for detecting these changes, allowing physicians to initiate appropriate interventions and prevent severe complications like vision loss and blindness.