Extranodal Rosai-Dorfman disease of the kidney and coexistent poorly differentiated prostatic adenocarcinoma.
We present a case of a patient who was initially diagnosed with poorly differentiated prostatic adenocarcinoma on prostate needle core biopsy. Upon staging workup, a computed tomographic scan showed a 9-cm left renal mass involving mainly the pelvicalyceal system. Positron emission tomographic scan showed increased uptake in para-aortic, paracaval, and retrocaval lymph nodes suspicious for metastatic disease. Left nephrectomy revealed involvement with extranodal Rosai-Dorfman disease. Lymphadenectomy revealed metastatic prostatic adenocarcinoma; however, the lymph nodes did not show evidence of Rosai-Dorfman disease. Isolated involvement of the kidney by Rosai-Dorfman disease is very rare. The combination of prostatic adenocarcinoma and isolated extranodal Rosai-Dorfman disease of the kidney makes this case unique.
Harik
Lara
L
Department of Pathology, Emory University Hospital, School of Medicine, Atlanta, Ga 30322, USA.
Nassar
Aziza
A
D000230:Adenocarcinoma / Q000150:complications* / Q000188:drug therapy / Q000556:secondary; D000368:Aged; D020533:Angiogenesis Inhibitors / Q000627:therapeutic use; D014408:Biomarkers, Tumor / Q000032:analysis; D015618:Histiocytosis, Sinus / Q000150:complications* / Q000473:pathology / Q000601:surgery; D006801:Humans; D007674:Kidney Diseases / Q000150:complications* / Q000473:pathology / Q000601:surgery; D008197:Lymph Node Excision; D008198:Lymph Nodes / Q000473:pathology; D008207:Lymphatic Metastasis; D008297:Male; D009392:Nephrectomy; D049268:Positron-Emission Tomography; D011471:Prostatic Neoplasms / Q000150:complications* / Q000188:drug therapy / Q000473:pathology
D020533:Angiogenesis Inhibitors; D014408:Biomarkers, Tumor