**Core Concept**
Squamous cell carcinoma (SCC) of the skin is a type of skin cancer that originates from the squamous cells, which are the thin, flat cells that make up most of the skin's outer layer. SCC is the second most common type of skin cancer, after basal cell carcinoma, and is often associated with sun exposure, UV radiation, and human papillomavirus (HPV) infection.

**Why the Correct Answer is Right**
Squamous cell carcinoma of the skin can arise from various sites, including the face, ears, neck, and hands, and often presents as a firm, pink or red bump or a sore that doesn't heal. SCC can also metastasize to lymph nodes and other organs, making early detection and treatment crucial. The characteristic histopathological feature of SCC is the presence of atypical squamous cells with loss of cell polarity and nuclear atypia.

**Why Each Wrong Option is Incorrect**
**Option A:** SCC is associated with radiation exposure, which is true, but it's not the only factor. SCC can also be linked to chemical carcinogens, such as arsenic, and immunosuppression in organ transplant patients.

**Option B:** SCC can indeed be treated with surgery, which is the mainstay of treatment for early-stage SCC, but other treatment options include topical chemotherapy, radiation therapy, and immunotherapy.

**Option C:** SCC is not typically associated with a strong familial component, unlike some other types of cancer, such as melanoma and basal cell carcinoma.

**Clinical Pearl / High-Yield Fact**
A key clinical correlation to remember is that SCC is more common in individuals with fair skin, a history of sunburn, and a history of smoking. It's essential to perform regular skin exams and encourage patients to practice sun protection and use sunscreen to reduce the risk of developing SCC.

**Correct Answer: A. SCC is associated with radiation exposure, but it's not the only factor.**