Pleomorphic adenoma of the external auditory canal: a case report and review of the literature.

Pleomorphic adenomas of the external auditory canal (EAC) are benign tumors of the ceruminal glands; they are a rare entity. Arising from the lateral cartilaginous portion of the EAC, these lesions can be challenging to diagnose in view of their rare clinical presentation, indolent symptoms, and a lack of familiarity on the part of histopathologists. We report the case of a pleomorphic adenoma in a 32-year-old woman, and we review the literature on glandular neoplasms of the EAC, with particular emphasis on terminology and factors that can hinder the diagnosis.

Marginal-zone B-cell lymphoma of the bony palate presenting as sinusitis.

The diagnosis of low-grade B-cell lymphoma consistent with marginal-zone lymphoma has proven to be challenging when the disease involves the hard palate. The diagnosis is complicated by the nonspecific nature of the presenting symptoms and a difficult-to-differentiate histologic picture. We describe a case of low-grade B-cell lymphoma of the hard palate with a delayed presentation. We also compare the features of this case with the features of the small number of other such cases that have been reported in the literature. Finally, we review the etiology of low-grade B-cell lymphoma, we discuss its radiologic and pathologic features, and we briefly describe the treatment options.