A case of myofasciitis due to 1,200 IU vitamin D treatment in a patient with lung adenocarcinoma

Vitamin D and its analogs are broadly used for lung cancer treatment due to their anti-tumor action and low toxicity. Although vitamin D is relatively safe, there have been some adverse reactions reported clinically when it is used for tumor treatment. The present study describes a 49-year-old patient who presented with lung adenocarcinoma and developed gluteal myofasciitis due to post-surgical treatment with 1,200 IU of vitamin D only. This is the first time that it has been reported that gluteal myofasciitis is related to the administration of vitamin D in a patient with lung cancer. The aim of this case report was to remind clinical staff that attention should be paid to adverse reactions of fasciitis caused by vitamin D.