Persistent Basal Cell Carcinoma Following Self-Treatment With a "Natural Cure," Sanguinaria canadensis.

A 65-year-old woman presented with a 6-week history of redness, eyelid swelling, and discharge in the right eye. Slit lamp examination revealed right medial canthal erythema with cicatricial lower lid ectropion, retraction, and inferior punctal obliteration. The patient was previously diagnosed with a medial canthal basal cell carcinoma 1.5 years ago, but opted for self-treatment with black salve, a commonly used naturopathic "cure" for skin cancer. Each application resulted in increasingly severe periorbital inflammation with eventual eschar formation. Over time, this led to cicatricial band formation over the medial canthus. After biopsy confirmation of residual basal cell carcinoma within the cicatricial tissues, the patient underwent Mohs surgery followed by multistaged reconstruction. Herein, we report a case of patient whose use of an unproven naturopathic "cure" led to persistent periorbital inflammation, persistence of malignancy, and significant tissue destruction.