前斜角筋より発生したデスモイド例

抄録

Desmoid tumor are benign fibrous tumors that can occur in the connective tissue of skeletal muscles, fascia, and tendon membranes. These tumors tend to recur locally despite being pathologically benign, and are regarded as being “clinically malignant”.
We report a case with a desmoid tumor that occurred in the anterior scalene muscles. A 39-year-old man visited our ENT facility complaining of a left neck pain and swelling of the neck appearing 4–5 years earlier. Computed tomography (CT) and magnetic resonance imaging (MRI) showed an inversional region in the anterior scalene muscles. A positron emission tomography/computed tomography (PET/CT) scan showed an accumulation in the same area with a standardized uptake value (SUV) of 3.3. A histological analysis revealed spindle cells, which stained positive for β-catenin and α-SMA in the nuclei and negativity for desmin, CD34, bcl-2 and S-100.
Accordingly, the patient was diagnosed as having a desmoid tumor.
Here, we describe the clinical course of this case and provide a review of the literature.