Development of Multiple Epidermal Inclusion Cysts After Radiofrequency Microtenotomy for Plantar Fasciitis: A Case Report.

Epidermal inclusion cysts are slowly developing intradermal lesions which form after the implantation of epidermal tissue into the dermal tissue. Epidermal cysts occur infrequently in the foot, but can occur after traumatic episodes, including surgically induced trauma. Epidermal inclusion cysts have been described as a complication of minimally invasive foot and ankle surgery; however, they have been described infrequently as a complication of radiofrequency microtenotomy. To our knowledge, only one other case study exists discussing the development of a singular epidermal cyst after undergoing radiofrequency microtenotomy. Therefore, the purpose of the present case report was to discuss a case of the development of multiple epidermal inclusion cysts of the plantar heel after radiofrequency microtenotomy for treatment of plantar fasciitis. After undergoing radiofrequency coblation in November 2017, the patient developed multiple plantar heel cysts. She went on to have them surgically removed in February 2018 and again in June 2018. By the time of presentation to our office in October 2018, multiple cysts were still present to her heel despite 2 surgical excisions. Seventeen months after surgical excision in February 2019, the patient remained cyst-free.