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Medicina (B.Aires) ; 64(6): 521-524, 2005. ilus, tab
Article in Spanish | LILACS | ID: lil-444260

ABSTRACT

Signet ring cell lymphoma is a rare neoplasm characterized by large, vacuolated and clear cells mimicking mucin-producing adenocarcinoma. It is localized in nodal and extranodal sites. A case of a 59 years old male, with a diffuse lymphoma signet ring cell type localized on oropharyngeal mucosa is reported. The histopathology study showed signet ring cells and the immunophenotype was: vimentine(+), CD45(+), CD20(+), Ig M(+), Kappa chain(+) and high index proliferative activity of neoplastic cells (Ki 67:70%). After a review of the literature and previous reports, we could not find a similar case in this anatomic site. The patient had a unfavourable clinical course and died two months after the diagnosis without receiving any treatment.


El linfoma de células en anillo de sello es una neoplasia poco frecuente, caracterizada por la presensenciade grandes células de citoplasma vacuolado, claro, similar a los encontrados en adenocarcinomasmucosecretantes. Se ha descripto en ganglios linfáticos y tejidos extralinfáticos. Se presenta el casode un paciente varón de 59 años con linfoma de células en anillo de sello localizado en pared lateral de orofaringe.Esta localización creemos que no ha sido descripta anteriormente. La histología mostró células en anillo de sello y el inmunofenotipo tumoral fue: vimentina, CD45, CD20, Ig M y cadenas kappa positivos, siendo la fracción de crecimiento tumoral alta (Ki 67:70%). El paciente evolucionó desfavorablemente y falleció a los dosmeses del diagnóstico sin recibir tratamiento.


Subject(s)
Humans , Male , Middle Aged , Adenocarcinoma, Mucinous/pathology , Carcinoma, Signet Ring Cell/pathology , Lymphoma, B-Cell/pathology , Oropharyngeal Neoplasms/pathology , Diagnosis, Differential , Treatment Outcome
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