What does CK20 positive mean?

What does CK20 positive mean?

For example, a CK7-negative/CK20-positive phenotype is often associated with carcinomas of colorectal origin, whereas a CK7-positive/CK20-negative phenotype is seen in a wide variety of carcinomas, including carcinomas of the lung, breast, thyroid, pancreas, and female genital tract.

What does it mean when a tumor is positive for CK7?

For the CK7 negative group, no tumor cells yielded positive IHC staining results for CK7. For the CK7 positive group, diffuse or focal CK7 positive tumor cells were present in tumor tissue. The diffuse distribution of CK7 positive tumor cells was often present in poorly differentiated CRCs.

What does GATA3 negative mean?

GATA3 negative tumors were enriched in the basal-like molecular subgroup and were associated with negative estrogen receptor (ER) and negative progesterone receptor (PR) statuses. Both CK7 and GATA3 expression showed no association with overall survival in patients with Grade 3 tumor.

What is CK20 negative mean?

CK20 (negative/rare positive): Most breast, lung, and salivary gland carcinomas, hepatocellular, renal, prostate, adrenocortical, squamous, and small cell carcinomas.

What does PAX8 positive mean?

PAX8-positive, calretinin-negative staining appears to be highly specific and sensitive for detecting metastatic ovarian serous carcinoma in cytological preparations and may prove useful for distinguishing these cells from mesothelial cells in fluid cytology (32).

What are CK7 and CK20?

Cytokeratin 7 (CK7) and cytokeratin 20 (CK20) are low molecular weight cytokeratins. The expressions of CK7 and CK20 have been studied in various primary and metastatic carcinomas. Their expression patterns may help to distinguish the site of origin of metastatic carcinomas.

What is GATA3 a marker for?

GATA3 is a useful marker in characterization not only mammary and urothelial but also for renal and germ cell tumors, mesotheliomas, and paragangliomas. The multiple specificities of GATA3 should be taken into account when using this marker to detect metastatic mammary or urothelial carcinomas.

What does grade 3 invasive ductal carcinoma mean?

A high grade number (grade 3) means a faster-growing cancer that’s more likely to spread. An intermediate grade number (grade 2) means the cancer is growing faster than a grade 1 cancer but slower than a grade 3 cancer.

What does PAX8 negative mean?

PAX8 is considered a negative marker for mesothelioma. This means mesothelioma cancer cells usually do not test positive for PAX8. PAX8 is a common marker for kidney cancer, thyroid cancer and cancers of the female reproductive system.

What does Napsin a positive mean?

Background. Napsin A and thyroid transcription factor-1 (TTF-1) are known to be useful immunohistochemical markers to distinguish primary lung cancers from metastatic lung tumors. These markers are usually positive in primary lung adenocarcinomas but not metastatic adenocarcinomas in other organs.

What is CK and CK7?

Cytokeratin 7 (CK 7) and cytokeratin 20 (CK 20) are low molecular weight cytokeratins. Their anatomic distribution is generally restricted to epithelia and their neoplasms. We surveyed 435 epithelial neoplasms from various organ systems by immunohistochemistry using CK 7 and CK 20 monoclonal antibodies.

Is PAX8 positive in urothelial carcinoma?

In conclusion, PAX8 can be positive in a significant proportion of nested variant of urothelial carcinoma cases, and recognition of this finding is important to avoid misdiagnosis of nested variant of urothelial carcinoma as nephrogenic adenoma based on PAX8 expression, particularly in cases with tubular …

What tumors are positive for PAX8?

Several previous studies have reported that PAX8 is expressed at high levels in specific types of tumor, including thyroid and renal carcinomas and pancreatic neuroendocrine tumors. In addition, PAX8 has been reported to be useful for the detection and differential diagnosis of ovarian carcinoma.

What is CK7 marker?

Cytokeratin 7 (CK7) is a type II basic low molecular weight cytokeratin that is found in simple epithelia in a variety of organs, including all epithelia in the female genital tract. 305,306. Epithelial tumors of the ovary and fallopian tube all exhibit cytoplasmic and/or membrane staining for CK7.

Is squamous cell carcinoma CK7 positive?

CK7 was positive in 31.6% of all cases, with varying positivity according to the site.