Rhabdomyosarcoma is the most common malignant tumor of the ear in
children. We report a case of a 31-year old male with HIV presenting
with a right external auditory canal mass which was determined to be a
spindle-cell variant embryonal rhabdomyosarcoma.
A 31-year old Filipino male presented with 3 months history of mild
intermittent right ear pain accompanied by ear fullness, and yellowish
non-foul smelling otorrhea. Unrecalled prescription otic drops relieved
symptoms temporarily. 2 months prior to consultation, he developed
progressive hearing loss, and bloody otorrhea during manipulation of the
right ear. Consultation showed a fleshy mass in his right ear canal.
Computed tomography revealed the mass extended into the middle ear.
Biopsy and tissue staining resulted to a diagnosis of embryonal
rhabdomyosarcoma, spindle-cell variant.
Rhabdomyosarcoma is a primitive mesenchymal malignant tumor with a
tendency for striated muscle tissue differentiation. In adults, the most
common location in this age group is in the extremities. The most common
histologic type is pleomorphic rhabdomyosarcoma which portends a worse
prognosis compared to spindle cell embryonal rhabdomyosarcoma.
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