Nuclear protein in testis (NUT) midline carcinoma (NMC) is a rare, aggressive, poorly differentiated form of squamous cell carcinoma caused by a chromosomal rearrangement of the NUT gene on chromosome 15. These tumors have a predilection for midline and paramidline structures of the upper aerodigestive tract and mediastinum and can affect patients across a broad age range, including children. In the current example, a 53 year old male presented with a mass originating in the left nasal cavity. The clinical, radiographic, and morphologic features of NMC are discussed.Keywords NUT midline carcinoma Á Undifferentiated carcinoma Á Nasal Á Nasal cavity Á Sinonasal Á Nuclear protein of testis Á Radiology
HistoryA 53 year old male presented with a 9 month history of left nasal congestion, rhinorrhea, and sinus tenderness. The patient also noted recurrent epistaxis lasting longer than 30 min 6 months prior to presentation. Additionally, patient reported recent onset of left facial numbness in the V 2 distribution of the trigeminal nerve. He denied fevers and weight loss, but did note drenching night sweats.
Radiographic FeaturesSinus CT examination revealed a soft tissue mass which completely obstructed the left nasal cavity. Coronal views delineated osseous expansion with erosion and destruction of the nasal septum and medial wall of the left maxillary sinus (Fig. 1a). There was opacification of left ethmoid air cells and the left maxillary sinus. Corresponding MR images demonstrated an 8.4 9 3.3 9 2.3 cm mass centered in the left nasal cavity (Fig. 1b). The mass was heterogeneously enhancing on postcontrast T1-weighted images and displayed predominantly isointense signaling with T2-weighted studies. The mass measured 8.4 cm in anterior-posterior dimension, including a pedunculated component that extended past the choana into the nasopharynx (Fig. 2). No intracranial extension or erosion into the orbits or cribriform was present. Brain and neck MRI evaluation revealed no evidence of brain metastasis or cervical lymphadenopathy.
TreatmentFollowing an incisional biopsy, the patient underwent functional endoscopic sinus surgery including a left maxillary antrostomy, total ethmoidectomy, sphenoidotomy,