eISSN: 2299-0046
ISSN: 1642-395X
Advances in Dermatology and Allergology/Postępy Dermatologii i Alergologii
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vol. 35
Letter to the Editor

Diagnosis of solitary extramedullary plasmacytoma located in the nasopharynx in a patient with acquired angioedema

Marcin Czaban
Marcin Moniuszko
Maciej Klimek
Mateusz Łukaszyk
Malgorzata Rozanska
Joanna Reszeć
Marek Rogowski
Anna Bodzenta-Łukaszyk

Adv Dermatol Allergol 2018; XXXV (6): 636-637
Online publish date: 2018/08/13
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Solitary extramedullary plasmacytoma (SEP) is a relatively rarely diagnosed and reported form of multiple myeloma with absent or low serum or urinary level of monoclonal immunoglobulin that most frequently presents as a soft tissue mass in the head and neck area [1, 2].
A 64-year-old Caucasian man with a history of recurrent angioedema, diabetes mellitus type 2, hypertension and alcohol dependence syndrome was referred to the University Hospital of Bialystok due to the sudden onset of angioedema without accompanying difficulty in breathing or swallowing. On admission to the Emergency Room, he presented angioedema of the upper lip, right cheek as well as tongue edema but no hives or itch. In the Emergency Room, the patient received systemic corticosteroids and antihistamines, and he was further referred to the Department of Allergology and Internal Medicine for treatment continuation.
Following admission to the clinical ward and gradual decrease in the edema size, the patient was examined by a board-certified otolaryngologist. The ENT examination revealed the presence of the oropharynx tumor covered by a fibrin layer which appeared to have originated from the nasopharynx. In concert with this notion, head and neck computed tomography showed an exophytic mass (15 × 19 mm) within oropharynx heading to its lumen (Figure 1). Surprisingly, histopathological and immunohistochemical analysis of the tumor specimen revealed diagnosis of plasmacytic myeloma. In some contrast, basic analyses as well as other standard tests routinely performed in either multiple myeloma or angioedema patients did not reveal significant abnormalities. Importantly, both myelogram and trepanobiopsy did not reveal the presence of malignant plasma cells. The X-ray survey did not reveal the presence of any osteolytic bone lesions.
After having established the diagnosis of solitary extramedullary plasmacytoma, the patient was qualified for radiotherapy to be performed in the settings of the oncological ward. Interestingly, according to the medical reports from previous hospitalization 4 years before, the presence of the unspecified lesion at the same location was also documented and referred to as putative fibroma. The patient was then recommended to have a histopathological examination, however he refused to do so. During the following 4 years, the patient did not report such changes in the clinical status as otherwise unexplained weight loss or fatigue.
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