case_images: PMC4647119_01
case_images: 51-year-old male presented with right facial pain of 2 years duration with no significant medical history and was later diagnosed with sinonasal adenoid cystic carcinoma. (a) CT bone window reveals a large expansive and infiltrative process involving the right nasal cavity, maxillary, and pterygomaxillary fossa (with arrows). (b) CT soft tissue window post intravenous contrast injection demonstrates moderate enhancement and, intracranial invasion involving sphenoidal sinuses and the right parasellar region (red arrows).
case_images: JCIS-5-57-g002.jpg
case_images: PMC4647119_01_JCIS-5-57-g002.jpg
case_images: F1
case_images: CT imaging revealed a large expansive and infiltrative process involving the right nasal cavity, maxillary, sphenoidal, and ethmoidal sinuses [Figure 1].
case_images: 51-year-old male presented with right facial pain of 2 years duration with no significant medical history and was later diagnosed with sinonasal adenoid cystic carcinoma. Fat-saturated T1-weighted and gadolinium-weighted MRI images: (a) axial view shows perineural spread through CN V2 in the infraorbital foramen (red arrow); (b) coronal view shows the mass involving the eyeball muscles, infiltrating the extraconal orbital floor (yellow arrow); and (c) coronal view shows intracranial invasion to the middle temporal fossa involving the cavernous sinuses (green arrow).
case_images: JCIS-5-57-g003.jpg
case_images: PMC4647119_01_JCIS-5-57-g003.jpg
case_images: F2
case_images: Post intravenous contrast administration, MRI revealed a hyperintense soft tissue expansive process and intracranial invasion of the middle temporal fossa involving the cavernous sinuses [Figure 2].
case_images: 51-year-old male presented with right facial pain of 2 years duration with no significant medical history and was later diagnosed with sinonasal adenoid cystic carcinoma. Biopsy tissue stained with hematoxylin and eosin, magnification 20x, shows (a) classic cribiform pattern, epithelial cells nests that form cylindrical patterns (red arrows) and (b) bone tissue infiltration by carcinoma (yellow arrows).
case_images: JCIS-5-57-g004.jpg
case_images: PMC4647119_01_JCIS-5-57-g004.jpg
case_images: F3
case_images: Following the results of the imaging studies, incisional biopsy was recommended confirming a "fragment of nasal adenoid cystic carcinoma" [Figure 3].