Introduction: Intramuscular haemangiomas of the digastric muscle are often misdiagnosed due to their low incidence and non-specific manifestation. Only two out of six previously reported cases were diagnosed correctly before excision. Ultrasound may not reveal their vascularity, and fine-needle aspiration biopsy is unhelpful as it reveals only blood.
Methods: A case of intramuscular haemangioma of the posterior belly of the digastric muscle is described. Previously reported cases are reviewed. Investigations used to diagnose the lesions and reasons for their common failure are discussed.
Results: Core-needle biopsy led to the correct histological diagnosis, and magnetic resonance imaging precisely located the lesion within the digastric muscle.
Conclusion: Core-needle biopsy was safely used in the diagnosis of an intramuscular haemangioma. The combination of core-needle biopsy and meticulous review of magnetic resonance imaging enables accurate diagnosis pre-operatively.