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Intramuscular hemangioma (IMH) is a rare, benign vascular lesion that frequently develops within skeletal muscles. Preoperatively, accurate diagnosis of IMH is often extremely difficult because of nonspecific clinical findings and the inaccuracy of fine-needle aspiration cytology. IMH is suspected in only 8% of preoperative diagnoses before surgical exploration. Here, we report a case of a 44-year-old man with a huge IMH in the anterior scalene muscle that was preoperatively diagnosed using ultrasonography-guided core needle biopsy, and was successfully treated based on preoperative clinical information.