A 44 year old man goes to his physician for an employment physical examination. The clinician notices that the patient’s fingers are clubbed. He also demonstrates tenderness over the distal ends of the radius, ulna, and fibula. This patient should be explicitly evaluated to exclude which of the following?

**Core Concept**
The patient's presentation of clubbed fingers and tenderness over the distal ends of long bones suggests a possible underlying condition affecting the lungs, cardiovascular system, or gastrointestinal tract. **Clubbing** is a deformity of the fingers or toes where the nails take on a club-like appearance, often indicative of chronic hypoxia.

**Why the Correct Answer is Right**
Given the symptoms, the clinician should evaluate the patient for **lung cancer**, as it is a common cause of clubbing and can also lead to **Hypertrophic Pulmonary Osteoarthropathy (HPOA)**, which causes tenderness over the distal ends of long bones due to periosteal new bone formation.

**Why Each Wrong Option is Incorrect**
**Option A:** Not provided, assuming it's not the correct answer.
**Option B:** Not provided, assuming it's not the correct answer.
**Option C:** Not provided, assuming it's not the correct answer.
Assuming one of these is the correct condition, the others would be incorrect based on the information given.

**Clinical Pearl / High-Yield Fact**
Clubbing can be associated with various conditions, including lung cancer, cystic fibrosis, and inflammatory bowel disease. The presence of clubbing and bone tenderness should prompt a thorough evaluation for underlying malignancy or chronic disease.

**Correct Answer:** D. Lung cancer

✓ Correct Answer: C. Lung cancer