**Core Concept**
Fatty change, also known as steatosis, is a pathological process characterized by the accumulation of excess fat droplets within cells. This phenomenon can occur in various organs, but it is most commonly associated with liver disease. However, in the context of the given question, fatty change is linked to another organ system.

**Why the Correct Answer is Right**
Fatty change in the kidney is often seen in conditions such as diabetic nephropathy, where high glucose levels lead to the activation of various pathways that promote lipid accumulation within renal cells. This process is particularly evident in the renal cortex and can be visualized through histological examination. The accumulation of fat droplets can disrupt normal cellular function, contributing to the progression of kidney disease.

**Why Each Wrong Option is Incorrect**
**Option A:** Fatty change is not typically associated with the brain, as this organ has a unique metabolic profile that protects it from excessive lipid accumulation. While the brain can be affected by various metabolic disorders, fatty change is not a characteristic feature of brain pathology.

**Option C:** Fatty change is not commonly seen in the adrenal glands, which are primarily involved in the production of hormones such as cortisol and aldosterone. While the adrenal glands can be affected by various pathological processes, fatty change is not a characteristic feature of adrenal disease.

**Option D:** Fatty change is not typically associated with the bladder, which is primarily involved in the storage and elimination of urine. While the bladder can be affected by various pathological processes, fatty change is not a characteristic feature of bladder disease.

**Clinical Pearl / High-Yield Fact**
Fatty change in the kidney is a significant prognostic indicator in patients with diabetic nephropathy, as it can contribute to the progression of kidney disease and ultimately lead to end-stage renal disease (ESRD). Early detection and management of fatty change in the kidney can help slow disease progression and improve patient outcomes.

**✓ Correct Answer:** B. Kidney