To present a case of phosphaturic mesenchymal tumor (PMT) in the temporalis muscle causing tumor-induced osteomalacia (TIO) and review existing literature, highlighting the significance of this rare occurrence.
Key Findings:
The patient exhibited hypophosphatemia, elevated alkaline phosphatase, and increased parathyroid hormone levels, indicating metabolic disturbance.
68Ga-DOTA-TATE PET/CT confirmed a hypermetabolic lesion in the left temporalis muscle, crucial for diagnosis.
Histopathological analysis confirmed the diagnosis of PMT with specific immunostaining, underscoring the tumor's characteristics.
Interpretation:
Clinicians should consider PMTs in patients with unexplained hypophosphatemia and utilize functional imaging for early detection, which can significantly impact treatment outcomes.
Limitations:
The study is based on a single case, limiting generalizability and the ability to draw broader conclusions.
Serum FGF23 levels were not measured, which could provide additional diagnostic information and insights into the pathophysiology.
Conclusion:
This case expands the anatomical spectrum of PMTs and highlights the importance of advanced imaging techniques in diagnosing TIO, emphasizing the need for early detection to improve patient outcomes.
