Biopsy? What Biopsy?
DISCUSSION
It would be obvious to most readers that a biopsy is in order, given the likelihood that this lesion is either a basal cell or squamous cell carcinoma—an impression bolstered by the contextual findings of advanced sun damage and the history of skin cancer. And yet, this patient finds himself with a nonhealing friable lesion that is at least 5 years old.
Repeated misdiagnosis as infection is actually a common occurrence. One suspects that at least some of the providers making this mistake followed the patient’s lead: Many affected patients assume such lesions represent infection and therefore demand treatment appropriate for that diagnosis.
As a rule, however, bacterial infections don’t last years, especially in the absence of pain and swelling. Yes, there are nonbacterial infections (eg, those caused by acid-fast bacilli) that can be just as, if not more, indolent, but they too are apt to be painful and swollen.
,Biopsy, the obvious missing step in this entire saga, would rule out any of these odd things (including melanoma, which has been known to present in this atypical morphologic manner). Other items in the differential include pyogenic granuloma and metastatic cancer (eg, breast, colon, lung).
In this case, biopsy confirmed the lesion was (as expected) a basal cell carcinoma. The lesion was excised in 2 stages over a 2.5-month period. And the patient was reminded that he will remain at extremely high risk for additional sun-caused skin cancers for the rest of his life.
TAKE-HOME LEARNING POINTS
- Nonhealing lesions should be assumed to be skin cancer until proven otherwise, especially in sun-damaged individuals.
- Correct treatment is dictated by correct diagnosis; in this case, a biopsy was clearly indicated.
- Besides the more common cancers (eg, basal cell and squamous cell carcinoma), there were numerous other items in the differential, including melanoma and even metastatic cancer.
- Only rarely do skin infections smolder for years without pain or surrounding erythema.
