====== Occipital intramuscular hemangioma ====== In the [[occipital region]] it is is easily misdiagnosed as [[arteriovenous malformation]] (AVM). A 31-year-old woman had a right occipital mass for 5 months without pulsation. Head computered tomography angiography (CTA) and digital substraction angiography (DSA) examinations showed that the lesion was mainly vascular, approximately 3 × 5 cm in size, and supplied by occipital arteries and the muscular branches of vertebral arteries. The venous drainage of the lesions communicated with the suboccipital vein plexus and the paravertebral vein in the venous phase, indicating AVM. Postoperative histological investigation showed the lesion was a hemangioma. It was recommended for surgical removal. The surgery was carried out under general anesthesia. The lesion showed a clear boundary. The occipital artery touched the anterior margin of the lesion, was exposed and ligated, and was removed around the lesion. The lesion consisted of massive blood vessels, and the surrounding muscles were swollen, indicating IH.After the lesion was removed, the normal muscle tissue around the lesion was also removed. The patient achieved a good recovery after surgery, and pathology confirmed IH. A postoperative 1-year CTA review was performed and showed partial residual, then the radiotherapy was recommended. She refused further radiotherapy, follow-up 2 years later showed no enlargement of the lesion. Although IH rarely occurs in the occipital region, this can occur. Due to the complexity of the drainage veins in the occipital region, these IH are prone to misdiagnosis as AVM ((Chen H, Xu B, Wang G, Guo Y, Hou K, Yu J. Posterior occipital intramuscular hemangioma mimicking arteriovenous malformation: Case report. Medicine (Baltimore). 2019 Mar;98(13):e14678. doi: 10.1097/MD.0000000000014678. PubMed PMID: 30921180. )). ===== Unclassified articles ===== 1: Chen H, Xu B, Wang G, Guo Y, Hou K, Yu J. 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