Continuous exposure to chrysotile asbestos can cause transformation of human mesothelial cells via HMGB1 and TNF-α signaling.

Malignant mesothelioma is strongly associated with asbestos exposure. Among asbestos fibers, crocidolite is considered the most and chrysotile the least oncogenic. Chrysotile accounts for more than 90% of the asbestos used worldwide, but its capacity to induce malignant mesothelioma is still debated. We found that chrysotile and crocidolite exposures have similar effects on human mesothelial cells. Morphological and molecular alterations suggestive of epithelial-mesenchymal transition, such as E-cadherin down-regulation and ß-catenin phosphorylation followed by nuclear translocation, were induced by both chrysotile and crocidolite. Gene expression profiling revealed high-mobility group box-1 protein (HMGB1) as a key regulator of the transcriptional alterations induced by both types of asbestos. Crocidolite and chrysotile induced differential expression of 438 out of 28,869 genes interrogated by oligonucleotide microarrays. Out of these 438 genes, 57 were associated with inflammatory and immune response and cancer, and 14 were HMGB1 targeted genes. Crocidolite-induced gene alterations were sustained, whereas chrysotile-induced gene alterations returned to background levels within 5 weeks. Similarly, HMGB1 release in vivo progressively increased for 10 or more weeks after crocidolite exposure, but returned to background levels within 8 weeks after chrysotile exposure. Continuous administration of chrysotile was required for sustained high serum levels of HMGB1. These data support the hypothesis that differences in biopersistence influence the biological activities of these two asbestos fibers.

How to write an article: Preparing a publishable manuscript!

Most of the scientific work presented as abstracts (platforms and posters) at various conferences have the potential to be published as articles in peer-reviewed journals. This DIY (Do It Yourself) article on how to achieve that goal is an extension of the symposium presented at the 36(th) European Congress of Cytology, Istanbul, Turkey (presentation available on net at http://alturl.com/q6bfp). The criteria for manuscript authorship should be based on the ICMJE (International Committee of Medical Journal Editors) Uniform Requirements for Manuscripts. The next step is to choose the appropriate journal to submit the manuscript and review the 'Instructions to the authors' for that journal. Although initially it may appear to be an insurmountable task, diligent organizational discipline with a little patience and perseverance with input from mentors should lead to the preparation of a nearly perfect publishable manuscript even by a novice. Ultimately, the published article is an excellent track record of academic productivity with contribution to the general public good by encouraging the exchange of experience and innovation. It is a highly rewarding conduit to the personal success and growth leading to the collective achievement of continued scientific progress. Recent emergences of journals and publishers offering the platform and opportunity to publish under an open access charter provides the opportunity for authors to protect their copyright from being lost to conventional publishers. Publishing your work on this open platform is the most rewarding mission and is the recommended option in the current modern era.[This open access article can be linked (copy-paste link from HTML version of this article) or reproduced FREELY if original reference details are prominently identifiable].

Parakeratotic-like cells in effusions - A clue to diagnosis of malignant mesothelioma.

BACKGROUND: Malignant mesothelioma (MM) is an aggressive neoplasm with a poor prognosis. Its incidence has been increasing worldwide. Cytological examination of an effusion is often the first opportunity to diagnose MM. However, the cytological diagnosis of MM can be difficult. We have noticed that parakeratotic-like cells, with orange cytoplasm and pyknotic nuclei, are present in many cases of mesothelioma on Papanicolaou-stained cytology slides. Although this cytological finding has been described previously, to our knowledge, there has been no systematic study of this finding. Our study is to determine whether the presence of small parakeratotic / orangeophilic cells (PK-like cells) is specific for the cytodiagnosis of mesothelioma. MATERIALS AND METHODS: A total of 90 body fluid cases were selected from our archived specimens in the Cytology Section at the University of Chicago Hospital accessioned between January 2000 to November 2011. They included 30 cases of mesothelioma, 30 cases of adenocarcinoma, and 30 cases of reactive mesothelial cells. RESULTS: PK-like cells were present in 83% of the mesothelioma cases, 13% of the adenocarcinoma cases, and 7% of the reactive cases. Our data showed that the presence of PK-like cells has a specificity of 90%, sensitivity of 83%, positive predictive value of 81%, and negative predictive value of 84% for the diagnosis of malignant mesothelioma in body cavity fluids. CONCLUSION: The presence of PK-like cells in the effusion specimen, especially in pleural effusions, is a highly specific and moderately sensitive cytological feature for diagnosis of mesothelioma.

Compensation crisis related to the onsite adequacy evaluation during FNA procedures-Urgent proactive input from cytopathology community is critical to establish appropriate reimbursement for CPT code 88172 (or its new counterpart if introduced in the future).

The confusion centered around appropriate use of the CPT billing code 88172 is addressed in the commentary from the Economic and Government Affairs Committee of the American Society of Cytopathology (ASC) who have written a timely commentary in this issue of Cytojournal, "Adequate Reimbursement is Crucial to Support Cost-Effective Rapid Onsite Cytopathology Evaluations". Currently, lack of standardized use within and between pathology departments is stirring unhealthy practices of denying reimbursements for this critical and legitimate cytopathology service. This editorial discusses the important concerns raised in this commentary and recommends immediate corrective action. (See also Al-Abbadi MA, et al. Adequate reimbursement is crucial to support cost-effective rapid on-site cytopathology evaluations. CytoJournal 2010;7:22).

A Pilot Study of Galectin-3, HBME-1, and p27 Triple Immunostaining Pattern for Diagnosis of Indeterminate Thyroid Nodules in Cytology With Correlation to Histology.

Indeterminate thyroid nodules form a heterogenous group of lesions that constitute 5% to 30% of thyroid cytology diagnoses. We introduce a triple immunostaining protocol for subtyping. Galectin-3, HBME-1, and p27 triple immunostaining, performed on destained cytology slides and formalin-fixed paraffin-embedded tissue, was developed and applied to 51 patients retrospectively with preoperative cytologic diagnoses of follicular lesion of undetermined significance (n=40), atypia of undetermined significance (n=6), and suspicious for follicular neoplasm (n=5). The malignant rate in this series was 43.1% (22/51). A hierarchal evaluation algorithm was generated based on digital image quantitation of triple-stained histologic sections, and applied to both cytology and histology specimens. Fifty of 51 cytology cases have triple staining validated by internal controls. In cytology specimens, the individual sensitivities and specificities of p27, Galectin3, and HBME1 for cancer with 95% confidence interval are: 86.2% (0.674, 0.955)/66.7% (0.431, 0.845); 77.3% (0.542, 0.913)/72.4% (0.525, 0.866); and 72.7% (0.496, 0.884)/93.1% (0.758, 0.988), respectively. Sensitivity is increased to 95.5% (0.751, 0.998), but specificity is decreased to 69.0% (0.490, 0.840), if Galectin3 and HBME1 are both used in combination as markers for malignancy. However, the level of specificity is increased to 86.2% (0.674, 0.955) and sensitivity remains high 100% (0.808, 1) if in addition, using the Galectin3/HBME1:p27 ratio (ratio ≥2 indicating malignancy) for 2 or 3 markers positive cases. Thus, the triple staining method on cytology slides and histology sections shows a similar sensitivity/specificity/positive predictive value/negative predictive value of 100.0%/86.2%/84.0%/100.0% and 95.5%/86.2%/84.0%/96.2%, respectively (P=0.92). Overall, p27 is the most frequent single positive marker (19/50, 38% in cytology), consistent with benign nature of most indeterminate thyroid nodules. Galectin-3 and HBME-1 colocalization (positive in the same cell) was demonstrated in thyroid cancer in 45.5% (10/22) of histology sections, but in none of the normal thyroid tissues and benign thyroid lesions. This supports the notion that synchronous activation of Galectin-3 and HBME-1 occurs in thyroid malignancy and is highly specific for malignancy. We have demonstrated the performance and pattern of triple immunostaining for subtyping indeterminate thyroid nodules. Further studies and validation in different larger populations are warranted.

Amyloid tumor: a clinical and cytomorphologic study.

We describe the cytologic findings and clinical presentation of three unusual cases of amyloid tumor. Two of our patients had low-grade lymphoid malignancies and the third insulin-dependent diabetes mellitus. In no cases was amyloid suspected as the cause of mass lesion. Two of our cases presented with superficial soft tissue mass and the third with right breast masses and bilateral axillary lymph node enlargement. Air-dried slides from all aspirated cases were stained with Diff-Quik for specimen adequacy evaluation. The remaining fixed slides were stained with Papanicolaou stain. Amyloid appeared as dark-blue to purple clumps of acellular material on Diff-Quik stain, accompanied with chronic inflammatory cell infiltrates and multinucleated giant cells, simulating granulomatous inflammation. Papanicolaou stain demonstrated cyanophilic to orangophilic acellular material. Amyloid was suspected and subsequently confirmed by Congo red stain.

Fine-needle aspiration of Riedel's disease: report of a case and review of the literature.

The cytomorphological features of a case of Riedel's thyroiditis (Riedel's disease) in a 37-yr-old woman are reviewed. The patient presented with a diffusely enlarged thyroid gland with extension to carotid and jugular vessels bilaterally. A fine-needle aspiration of the right lobe of the thyroid demonstrated moderate cellularity with fragments of fibrous tissue with bland spindle-shaped cells and myofibroblasts. The patient subsequently underwent a bilateral subtotal thyroidectomy with removal of two-thirds of both lobes of the thyroid. A frozen section diagnosis of Riedel's disease was later confirmed on paraffin sections. Here we describe the cytological findings of a case of Riedel's disease and provide some helpful clues in distinguishing it from other forms of thyroiditis such as fibrosing variant of Hashimoto's thyroiditis, subacute thyroiditis, or granulomatous thyroiditis and from malignancy with which it can be confused both clinically and cytologically.

Collagen balls in cervical smears. A previously undescribed finding.

OBJECTIVE: To evaluate several conventional cervical smears obtained from women undergoing routine screening for cervical dysplasia or carcinoma and whose smears contained structures resembling collagen balls. STUDY DESIGN: Between 1995 and 1998, cervical smears containing collagen balls were analyzed. The clinical histories of the patients whose smears contained collagen balls, including the gestational history, were reviewed. Histopathologic material from any related surgical specimens was reviewed, with special attention to mesothelial surfaces. RESULTS: Collagen balls were found in 5 of 77,891 Pap smears examined (0.006%). None of the patients had evidence of neoplasms of the genital tract. One of the patients was in the first trimester of pregnancy. CONCLUSION: We suggest that collagen balls in cervical smear originate in mesothelium-covered organs, from where they are transported via the fallopian tubes into the uterine cavity. Their significance lies in their being mistaken for mucin-distended cells exfoliated from a neoplasm or from detached fragments of a papillary ovarian neoplasm.

Cytological features of mixed adenoneuroendocrine carcinoma of the ampulla: two case reports with review of literature.

Mixed adenoneuroendocrine carcinoma (MANEC) of ampulla is rare, with only 13 cases reported, and the diagnoses were all based on histology mostly after surgery. We describe two new cases with cytological features of signet ring-cell carcinoma mixed with small-cell carcinoma, and intestinal adenocarcinoma mixed with large-cell neuroendocrine carcinoma. Our cases and literature review demonstrate the higher frequency of periampullary-duodenum subtype in MANEC compared with non-MANEC ampullary carcinomas. In accordance, of the 14 MANEC cases with detailed morphology available, the most common glandular components are intestinal-type carcinoma (6/14), followed by goblet carcinoid tumor (3/14), signet ring-cell carcinoma (2/14), pancreatobiliary-type carcinoma (2/14), and pancreatic acinar cell carcinoma (1/14). The intestinal-type carcinoma and goblet carcinoid in MANEC are favorable histological types showing no distant metastasis or mortality (0/9) during 6-36 months follow-up. In contrast, the signet ring cell, pancreatobiliary-type carcinoma, and acinar cell carcinoma are unfavorable with distant metastatic rate and mortality rate of 80% (4/5) during 3-16 months follow-up. The combination of favorable glandular histological types with high-grade neuroendocrine tumors (neuroendocrine carcinoma) has a mortality rate of 0% (0/3), whereas the combination of unfavorable glandular types with low-grade neuroendocrine tumors (e.g., carcinoid, atypical carcinoid) has a mortality rate of 100% (3/3). In addition, younger age (<40 years) seems to be associated with high mortality rate of 100% (2/2). Overall, cytology preparations are able to make the diagnosis of MANEC and distinguish the subcomponents. Disease progression is apparently driven by the carcinomatous component of the tumor.

The fascinating history of urine examination.

Examination of urine has fascinated people since the beginning of recorded history. It is arguably the oldest medical test and marks the beginning of laboratory medicine. Examination of urine, urinalysis, is still important today in evaluation of many pathologic conditions, including diabetes mellitus, infections, renal and inherited diseases, as well as genitourinary tract cancer. Although urine cytology is simple, safe, and inexpensive, it has poor sensitivity, especially for low-grade neoplasms. This shortcoming has led to a proliferation of new diagnostic techniques for evaluation of urine samples. Examination of urine has come a long way, from uroscopy to microscopy, and now to molecular testing. Although the new era of tumor markers looks promising, for now it still needs the help of "good old cytology."

Axillary metaplastic breast carcinoma with ipsilateral pectoral invasive ductal carcinoma: an unusual presentation.

We report a case of axillary metaplastic breast carcinoma (MBC) with triple negative (ER-/PR-/Her2-) phenotype, concurrent with multifocal invasive ductal carcinoma (IDC) of ipsilateral pectoral breast (ER+/PR+/Her2-) in a 60-year-old woman. The two tumors demonstrate different morphology, immunophenotype, and opposite response to neoadjuvant chemotherapy of paclitaxol, adriamycin, and cyclophosphamide. Methylation analysis of human androgen receptor (HUMARA) on X-chromosome identified monoclonal pattern of X-chromosome inactivation in MBC and mosaic pattern in the IDC. Stem cell origin of MBC is suggested in this case. Clinicopathological features, imaging findings, biological markers, chemoradiation management, and prognosis of MBC are reviewed in comparison to invasive ductal carcinoma. Our case and literature review suggest that traditional chemotherapy applicable to IDC is less effective towards MBC. However, new chemotherapy protocols targeting stem cell and multimodality management of MBC are promising. Recognition of unusual presentation of MBC will help tailor therapy towards tumor with worse prognosis.

Immunohistochemical analysis of E-cadherin and zeste homolog 2 expression in endoscopic ultrasound-guided fine-needle aspiration of pancreatic adenocarcinoma.

BACKGROUND: Recent studies have demonstrated that partial or complete loss of E-cadherin (EC) and nuclear accumulation of zeste homolog 2 (EZH2) are hallmarks of poorly differentiated pancreatic adenocarcinoma (PAC). Depletion of EZH2 sensitizes cancer cells to chemotherapy in vitro. The objective of this study was to determine EC and EZH2 expression by immunohistochemistry (IHC) in samples obtained by endoscopic ultrasound-guided fine-needle aspiration (EUS-FNA) as potential biomarkers for treatment and disease prognosis. METHODS: Thirty-eight EUS-FNA samples from patients with a PAC diagnosis were analyzed by IHC for EC and EZH2 expression. Seven corresponding surgical resection specimens were included in the study. The intensity of EZH2 and EC expression in PAC and in normal gastrointestinal pick-ups (internal positive control) was scored by using a 4-tier grading system. RESULTS: EC demonstrated a focal, weak-to-moderate decrease in 24 PAC samples. Complete loss of EC expression was observed in the poorly differentiated areas represented by single tumor cells. The average staining intensity of EC in samples of poorly differentiated PAC was significantly lower than that of moderately differentiated PAC samples (P = .0005). EZH2 was variably positive in 31 of 38 PAC samples. The average staining intensity of EZH2 in moderately and poorly differentiated PACs did not differ significantly (P = .81). CONCLUSIONS: EC and EZH2 expression was determined reliably by IHC on paraffin sections of EUS-FNA cell block specimens. The current results were consistent with prior reports indicating a decrease or loss of EC expression in poorly differentiated PAC. However, EZH2 expression did not always correlate inversely with EC expression and was more heterogeneous.

Follicular lesions of the thyroid: a retrospective study of 1,348 fine needle aspiration biopsies.

Fine needle aspiration (FNA) has proven to be an effective tool in management of patients with thyroid nodules. However, the diagnosis of follicular patterned lesions can be challenging. The surgical and cytopathology computer database at a large referral medical center was searched for cases that had both cytologic and histologic thyroid accessions from January 2004 to November 2008. A total of 1,255 histologic thyroid specimens and 2,776 thyroid FNA biopsies were retrieved for review. Histologically, 272 overt malignancies were identified; 20 (7.4%) were follicular carcinomas. Cytologically, 1,348 cases were follicular-patterned lesions, comprising 1,044 cases of "benign follicular nodules" (BFN), 137 cases of "follicular lesions of undetermined significance" (FLUS), and 167 cases of "suspicious for follicular neoplasm" (SFN). Seventy-nine (7.5%) of BFN, 23 (16.8%) of FLUS, and 65 (38.9%) of SFN cases had histologic follow-up. Overt malignancy, a cystic papillary carcinoma, was identified histologically in only one case of BFN, for a negative predictive value of 98.7%. Overt malignancy was identified histologically in two cases of FLUS, both follicular variant of papillary carcinoma, for a positive predictive value of 8.7%. Overt malignancy was identified histologically in 14 cases of SFN, for a positive predictive value of 21.5%. Five follicular carcinomas were identified histologically in the SFN category, all minimally invasive. Incidental ("occult") papillary microcarcinoma were identified histologically in all three categories. In this study, the risk of overt malignancy increases from 1.3%, to 8.7%, to 21.5% for BFN, FLUS, and SFN, respectively. All follicular carcinomas identified histologically occurred in the SFN category and all were minimally invasive. Papillary microcarcinomas can occur in any of the three diagnostic categories.

Diagnostic terminology and morphologic criteria for cytologic diagnosis of thyroid lesions: a synopsis of the National Cancer Institute Thyroid Fine-Needle Aspiration State of the Science Conference.

The National Cancer Institute (NCI) sponsored the NCI Thyroid Fine-needle Aspiration (FNA) State of the Science Conference on October 22-23, 2007 in Bethesda, MD. The two-day meeting was accompanied by a permanent informational website and several on-line discussion periods between May 1 and December 15, 2007 (http://thyroidfna.cancer.gov). This document summarizes matters regarding diagnostic terminology/classification scheme for thyroid FNA interpretation and cytomorphologic criteria for the diagnosis of various benign and malignant thyroid lesions. (http://thyroidfna.cancer.gov/pages/info/agenda/).