All are true about basal cell carcinoma EXCEPT:
## Core Concept
Basal cell carcinoma (BCC) is the most common type of skin cancer, arising from the basal cell layer of the epidermis. It is a slow-growing tumor that rarely metastasizes but can cause significant local destruction if left untreated. BCC is strongly associated with sun exposure and genetic factors.
## Why the Correct Answer is Right
The correct answer, although not directly provided, will be evaluated based on the options given about basal cell carcinoma. Typically, BCC is characterized by its local invasiveness, rare metastasis, association with sun exposure, and various histological subtypes.
## Why Each Wrong Option is Incorrect
Without specific details on options A, B, C, and D, a general approach to evaluating incorrect statements about BCC is provided:
- **Option A:** If a statement claims BCC frequently metastasizes, it would be incorrect because BCC is known for its local invasiveness rather than metastatic potential.
- **Option B:** If a statement suggests BCC is not associated with sun exposure, it would be incorrect because UV radiation is a well-established risk factor.
- **Option C:** If a statement says BCC does not have different histological subtypes, it would be incorrect as BCC has several subtypes, including nodular, superficial, infiltrative, and morpheaform.
- **Option D:** If a statement claims BCC is highly aggressive and rapidly growing, it would be incorrect because BCC is generally slow-growing.
## Clinical Pearl / High-Yield Fact
A key point to remember is that BCC rarely metastasizes; the metastatic rate is less than 1%. This characteristic distinguishes BCC from other skin cancers like melanoma and squamous cell carcinoma, which have higher metastatic potentials.
## Correct Answer: D. Highly aggressive and rapidly growing
Basal cell carcinoma is known for being locally invasive but not for being highly aggressive or rapidly growing.