**Question:** An edentulous 72-year-old man with a 50-year history of cigarette smoking presents with a nontender, hard mass in the lateral neck. The simplest way to establish an accurate histological diagnosis of a neck mass suspected to be cancerous is

A. Fine-needle aspiration biopsy (FNAB)
B. Incisional biopsy
C. Core biopsy
D. Fine-needle aspiration biopsy (FNAB)

**Correct Answer:** D. Fine-needle aspiration biopsy (FNAB)

**Core Concept:**

The process of arriving at an accurate diagnosis of a suspected malignant neck mass involves obtaining a tissue sample for histopathological examination. In this case, the patient has a nontender and hard mass, which points towards a malignant process. The simplest and most effective method for obtaining an accurate histological diagnosis is **Fine-needle aspiration biopsy (FNAB)**.

**Why the Correct Answer is Right:**

Fine-needle aspiration biopsy (FNAB) is the most appropriate choice for diagnosing a suspected malignant neck mass due to several reasons:

1. **Minimally invasive:** FNAB is a minimally invasive procedure, involving the use of a thin needle to aspirate cells from the mass into a sterile container for laboratory examination. This reduces patient discomfort and risk compared to more invasive methods like incisional biopsy or core biopsy.
2. **Quick turnaround time:** FNAB allows for rapid examination of the aspirated cells, leading to a quicker diagnosis. This is crucial for guiding appropriate treatment decisions and patient management.
3. **Low risk of complications:** FNAB carries a low risk of complications such as infection, hemorrhage, or nerve injury. However, it is essential to perform the procedure by a skilled practitioner to minimize complications and ensure accurate results.

**Why Each Wrong Option is Incorrect:**

A. Incisional biopsy (also known as incision biopsy): This involves making a small incision to obtain a tissue sample, which is more invasive and carries a higher risk of complications compared to FNAB.

B. Core biopsy: Similar to incisional biopsy, core biopsy involves making a small incision and removing a larger tissue sample. It is more invasive than FNAB and carries a higher risk of complications.

C. Core needle biopsy: This is another term for core biopsy, which is also more invasive than FNAB and carries a higher risk of complications.

**Clinical Pearls:**

1. While the patient's age, smoking history, and mass characteristics might initially lead one to consider a malignant process, the correct choice is FNAB due to its minimally invasive nature, rapid turnaround time, and low risk of complications. It is crucial to ensure high-quality results and patient safety.