Pathology – MCQ 31 – Immunohistochemical staining

An undifferentiated malignant tumour on immunohistochemical stain shows cytoplasmic positivity of most of the tumor cells for cytokeratin. The most probable diagnosis of the tumor is:
a) Sarcoma
b) Lymphoma
c) Carcinoma
d) Malignant Melanoma

Correct answer : c) Carcinoma