Abstract
Pentazocine, a synthetic opioid with partial agonist and antagonist activity administered by parenteral injection, was used clinically in the 1970s. Dermatologic complications at injection sites were reported soon after its introduction. These complications are thought to be underreported. Many well-documented cases describe the development of fibrosis and calcinosis at the site of parenteral pentazocine injections, but few reports document management or successful treatment of the long-term sequelae of these manifestations. The successful use of STSG for the treatment of chronic nonhealing ulcers secondary to pentazocine-induced cutaneous fibrosis in a 78-year-old male is presented. In the early 1970s, he was started on 3-times-daily intramuscular pentazocine injections to treat pain secondary to ulcerative colitis. He injected himself in the proximal thighs and buttocks for a period of approximately 10 years. He gradually developed severe soft tissue calcifications of both buttocks and anterior thighs. In the mid-to-late 1980s, the pentazocine injections were discontinued. The diffuse sclerosis and disfiguring fibrosis remained. This case underscores the lasting effects of pentazocine-induced cutaneous sclerosis and fibrosis, with cutaneous complications manifesting in this patient even decades after use. It also highlights the novel use of STSG as a treatment strategy for these cutaneous complications.
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