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This FS dog has a history of temperal Muscle Atrophy, Left eye enophthalmus, sneezing
Physical Exam: otherwise wnl
CBC/Chem wnl
This FS dog has a history of temperal Muscle Atrophy, Left eye enophthalmus, sneezing
Physical Exam: otherwise wnl
CBC/Chem wnl
CT of the head, plain and post contrast- The computed tomography of the head reveals a soft tissue attenuating mass lesion
within the nasopharynx on the dorsal aspect of the soft palate level with the
temporomandibular joints. The mass measures approximately 1 cm in diameter and
3.5 mm in height and causes a mild nasopharyngeal stenosis. After administration of
iodinated contrast media there is mild uniform contrast enhancement within the mass
lesion.
Nasal cavities are within normal limits. There is no evidence of mucosal soft tissue
swelling, nasal secretions or turbinate destruction.
There is moderate bilateral atrophy of the temporal muscles with secondary
enophthalmos, which appears to be symmetric between the left and the right side. The
skull foramina harboring the peripheral branches of the trigeminal nerve are within
normal limits for the left and the right side. There also is no evidence of a contrastenhancing
mass lesion within the region of the emergence of the trigeminal nerve at
the skull base.
The lymph nodes of the head are within normal limits.
Possible differential diagnoses include an atypical nasopharyngeal polyp, as well as
true soft tissue neoplasia such as lymphosarcoma, melanoma, fibroma, fibrosarcoma,
squamous cell carcinoma or other.
The location of the mass lesion would be unusual for a polyp as there is no anatomic
connection with the tympanic bullae plus there is no evidence of chronic otitis or other
typical underlying diseases to polypoid proliferation.
For further diagnostic workup biopsy of the mass lesion for histopathologic
examination is recommended via retrograde endoscopy.
The temporal muscle atrophy is likely to be age-related and incidental here.
