Anaplastic carcinoma is a general term for a malignant neoplasm arising from the uncontrolled proliferation

Proliferation

Proliferation may refer to:*Nuclear proliferation*Chemical weapon proliferation*Cell proliferation* The proliferative phase of wound healing...

 of transformed cells of epithelial origin, or showing some epithelial characteristics, but that reveal no cytological

Cytology

Cytology means "the study of cells".Cytology is that branch of life science, which deals with the study of cells in terms of structure, function and chemistry.Based on usage it can refer to:...

 or architectural features of associated with more differentiated tumor

Tumor

A tumor or tumour is commonly used as a synonym for a neoplasm that appears enlarged in size. Tumor is not synonymous with cancer...

s, such as the glandular formation or special cellular junctions that typical of adenocarcinoma

Adenocarcinoma

Adenocarcinoma is a cancer of an epithelium that originates in glandular tissue. Epithelial tissue includes, but is not limited to, the surface layer of skin, glands and a variety of other tissue that lines the cavities and organs of the body. Epithelium can be derived embryologically from...

 and squamous cell carcinoma

Squamous cell carcinoma

Squamous cell carcinoma , occasionally rendered as "squamous-cell carcinoma", is a histologically distinct form of cancer. It arises from the uncontrolled multiplication of malignant cells deriving from epithelium, or showing particular cytological or tissue architectural characteristics of...

, respectively.