## Core Concept
Lysosomal storage disorders (LSDs) are a group of genetic diseases caused by deficiencies in lysosomal enzymes or proteins, leading to accumulation of substrates within lysosomes. This accumulation disrupts cellular function and leads to cellular damage. LSDs can affect various organs and tissues, depending on the type of substrate accumulated.

## Why the Correct Answer is Right
The correct answer involves understanding the pathophysiology of LSDs. In LSDs, the substrates accumulate due to enzyme deficiency, leading to cellular dysfunction. The accumulation of substrates typically occurs because of issues in the lysosomal degradation pathway.

## Why Each Wrong Option is Incorrect
To accurately address why each wrong option is incorrect, the specific options (A, B, C, D) need to be provided. However, given the structure of the question and common examples of LSDs, we can infer:

- **Option A:** If this option describes a feature commonly seen in LSDs (like accumulation of substrates), it would be incorrect to state it does not occur.
- **Option B:** Similarly, if this option is a characteristic of LSDs, it would not be the correct answer.
- **Option C:** This could potentially describe a mechanism or feature of LSDs, making it incorrect if it's indeed associated with LSDs.
- **Option D:** This is the correct answer because it presumably describes something that does not occur in LSDs.

Without specific details on A, B, C, or D, a general approach is provided: Each incorrect option likely represents a process or feature known to be associated with LSDs, such as lysosomal enlargement, accumulation of toxic substances, or cellular dysfunction.

## Clinical Pearl / High-Yield Fact
A key point to remember is that LSDs are often due to deficiencies in **acid hydrolases** or **lysosomal membrane proteins**, leading to the accumulation of substrates like **glycolipids**, **glycoproteins**, or **mucopolysaccharides**. A classic example is **Gaucher's disease**, caused by a deficiency of **glucocerebrosidase**, leading to accumulation of **glucocerebroside**.

## Correct Answer Line
**Correct Answer: D.**