<prompt> All of the following are histological features of follicular carcinoma, except:Capsular and vascular invasionUniform cells forming repetitive follicular patternIntranuclear grooves and nuclear pseudo-inclusionsHuhle cell variant present  <response>: Intranuclear grooves nuclear pseudo-inclusions are seen in papillary carcinoma of thyroid, not in follicular carcinoma. Histological features of follicular thyroid carcinoma: Microscopically, most follicular carcinomas are composed of fairly uniform cells forming small follicles containing colloid, quite reminiscent of normal thyroid. Occasional tumors are dominated by cells with abundant granular, eosinophilic cytoplasm - Huhle cells oncocytic variant of follicular carcinoma. Nuclei lack features of typical papillary carcinoma psammoma bodies are not present. There is no reliable cytologic difference bw follicular adenomas minimally invasive follicular carcinomas. Making this distinction requires extensive histologic sampling of tumor-capsule-thyroid interface to exclude capsular andor vascular invasion. 