micropapillary carcinoma

micropapillary carcinoma

A generic term for a carcinoma characterised by small, tight clusters of neoplastic cells devoid of fibrovascular cores floating in clear spaces, resembling lymphatics or small papillary clusters, and surrounded by prominent stromal desmoplasia. They are often present at high stages with nodal involvement.

Examples
Breast, lung, ovary, salivary duct, thyroid, urothelium.
References in periodicals archive ?
Rare morphologic variations, such as the presence of mucin-rich, sarcomatoid, and micropapillary carcinoma, have also been reported.
3%) cases of each of the following were reported: metaplastic carcinoma, apocrine-type carcinoma, and micropapillary carcinoma.
These rare breast lesions are fibromatosis, idiopathic granulomatous mastitis, tubular adenoma, diabetic mastopathy, invasive micropapillary carcinoma, osteoclastic giant cell breast carcinoma, malignant phyllodes tumor, carcinoma arising in fibroadenoma, metastasis, and metaplastic carcinoma.
Occult micropapillary carcinoma associated with benign follicular thyroid disease and unrelated thyroid neoplasms.
6,7) The lipoid cell population typically composes 10 50% of the tumour, with the remainder being conventional urothelial carcinoma or another rare subtype, including plasmacytoid and micropapillary carcinoma.
1) Second, palpable cervical node metastasis is a common sign of papillary thyroid carcinoma, and in some cases, the primary tumor is a micropapillary carcinoma.
The postoperative pathology report was compatible with thyroiditis and 6 mm micropapillary carcinoma at one focal area in the right lobe.
Incidentally, on the left thyroid lobe a micropapillary carcinoma, follicular-variant that measured 2 mm in diameter and totally excised was also identified.
The presence of a stromal core contrasts with the lack of such a component in "micropapillary" lesions, including the micropapillary pattern of ductal carcinoma in situ (DCIS) and invasive micropapillary carcinoma.
Micropapillary carcinoma smaller than 1cm, was detected in 2 patients.
18] To our knowledge, this is the first case of spontaneous intraperitoneal rupture of the urinary bladder due to a micropapillary carcinoma of the bladder.
Invasive micropapillary carcinoma (IMPC) is a morphologically distinctive form of mammary carcinoma composed of small, hollow or morula-like clusters of cancer cells, surrounded by clear stromal spaces.