## Core Concept
Adenocarcinoma of the lung is a type of non-small cell lung cancer (NSCLC) that originates in the glandular cells, which are located in the outer part of the lungs and other internal organs. It is the most common type of lung cancer, especially in non-smokers. Adenocarcinoma is known for its diverse histological patterns and its tendency to occur in smaller airways.

## Why the Correct Answer is Right
The correct answer, ., implies that the statement regarding adenocarcinoma of the lung is not true. Typically, adenocarcinoma of the lung does not usually present with central lesions; instead, it often presents with peripheral lesions. This characteristic is crucial for distinguishing it from other types of lung cancers, such as squamous cell carcinoma, which more commonly presents with central lesions.

## Why Each Wrong Option is Incorrect
- **Option A:** Typically, adenocarcinoma is associated with smoking but can also occur in non-smokers, making it a plausible statement about adenocarcinoma.
- **Option B:** Often, adenocarcinoma presents with peripheral lesions, making this statement true and not the correct answer to "all except."
- **Option C:** This option might discuss common mutations or presentations associated with adenocarcinoma, which would be true and not the correct answer.
- **Option D:** If this option describes a characteristic commonly associated with adenocarcinoma, such as being the most common type of lung cancer in non-smokers, then it would be incorrect as "all except."

## Clinical Pearl / High-Yield Fact
A key point to remember is that adenocarcinoma of the lung is the most common lung cancer in non-smokers and tends to have a higher incidence of specific mutations, such as those in the **EGFR** gene, which can influence treatment options.

## Correct Answer: D.