RESUMO
Melanoma metastasizes to the gastrointestinal tract in 2-4% of cases. In addition, it is the tumor that most frequently metastasizes to the gallbladder (50-67% of metastasis at this level). Even so, these metastases are infrequent. The indication of cholecystectomy will be provided by the patient performance status, extension and prognosis of disease. Although open surgery is preferred to treat melanoma metastasis at this level, laparoscopic surgery could be a safe technique that allows a fast recovery of the patient. We present the case of a 48-year-old man with melanoma metastases in the gallbladder treated by laparoscopic cholecystectomy.
Assuntos
Colecistectomia Laparoscópica , Neoplasias da Vesícula Biliar , Melanoma , Colecistectomia , Neoplasias da Vesícula Biliar/diagnóstico por imagem , Neoplasias da Vesícula Biliar/cirurgia , Humanos , Masculino , Melanoma/diagnóstico por imagem , Melanoma/cirurgia , Pessoa de Meia-IdadeRESUMO
SPIB is an Ets transcription factor that is expressed exclusively in mature B cells, T-cell progenitors, and plasmacytoid dendritic cells. In the present study, we developed a novel mAb against the SPIB protein and characterized its expression in major hematolymphoid neoplasms, including a series of 45 cases of blastic plasmacytoid dendritic cell (BPDC) neoplasms and their potential cutaneous mimics. We found that SPIB is expressed heterogeneously among B- and T-cell lymphoma types. Interestingly, SPIB is expressed in a large proportion of nongerminal center type DLBCLs. In cutaneous neoplasms, SPIB is overexpressed in all BPDC neoplasms, but none of its cutaneous mimics. SPIB remains overexpressed in all cases that lack 1 or 2 of the markers used for BPDC neoplasms (ie, CD4, CD56, TCL1, and CD123). We conclude that SPIB expression can be used as a tool for diagnosing BPDC neoplasms, but it needs to be tested in conjunction with the growing arsenal of markers for human plasmacytoid dendritic cells.