An organized hematoma in the right parapharyngeal space: a case report and literature review

Organized hematoma is a relatively common condition that can occur in various locations throughout the body. There have been sporadic reports of organized hematomas in the literature, reported in locations such as the maxillary sinus, thyroid gland, and subdural cavity, which are common in the head and neck. Studies have shown that the mechanism of organized hematoma formation may be related to trauma, surgery, hemorrhage, vascular disease, or hematological disease. The composition of organized hematomas is mostly identical, the center is formed by a large number of organized blood clots which are surrounded by granulation tissue and dense fibrous connective tissue. Parapharyngeal space (PPS) is a latent fascial space deep in the lateral superior neck of the pharynx. Pathological changes in the PPS are rare, and most of them are benign tumors. An organized hematoma in the PPS is extremely rare. Only one case has previously been reported. Here, we report a second case in which a fine needle aspiration biopsy indicated a benign adenoma in the right PPS. The findings help to expand the differential diagnosis of PPS tumors and deepen the understanding of PPS organized hematoma, a rare benign lesion.