Clinical and ultrasonography follow-up of five cases of calcinosis cutis successfully treated with intralesional sodium thiosulfate.

Calcinosis cutis (CC) is characterized by deposit of calcium salts in the skin and subcutaneous tissue; its clinical presentation consists of indurated painful nodules, which can ulcerate and become superinfected. CC treatment remains a challenge, yet successful treatment with intralesional (IL) sodium thiosulfate (STS) has been reported in several CC subtypes. Herein we are reporting on a case series of 5 patients with CC successfully treated with IL-STS. We describe the 18-22 MHz ultrasound characteristics of the lesions and on follow-up after treatment. Ultrasound imaging was useful in guiding IL-STS injections and confirming response to treatment.