title: The differential diagnosis of the mass in the neck. A fresh look.
abstract: A diagnosis of undifferentiated carcinoma by light microscopy in a neck node biopsy is insufficient to come to a conclusive answer as to the type of tumor with which one is dealing. The fact that undifferentiated carcinoma by light microscopy may very well be a histiocytic lymphoma with a different mode of treatment and an increasingly improved cure rate has changed the mode of evaluation in arriving at a diagnosis of the node in the neck with no visible primary in the upper aerodigestive tract.
mesh_terms: D001707:Biopsy, Needle; D002294:Carcinoma, Squamous Cell / Q000473:pathology*; D003937:Diagnosis, Differential; D006258:Head and Neck Neoplasms / Q000473:pathology*; D006652:Histological Techniques; D006801:Humans; D008207:Lymphatic Metastasis / Q000473:pathology*; D008223:Lymphoma / Q000473:pathology*; D008854:Microscopy, Electron; D010348:Patient Care Team