Variant Of Adenocarcinoma Research Articles

S1533 An Unusual Presentation of a Rare Ampullary Neoplasia

INTRODUCTION: Ampullary neoplasias are uncommon, with most tumors being of pancreaticobiliary or intestinal origins. SRCC of the Ampulla of Vater is an extremely rare variant of adenocarcinoma with only 38 previously cases reported in the literature. Little is known about the pathogenesis, treatment, and outcomes of this uncommon subtype. We report a case of ampullary SRCC in a patient who presented with a TIA and choledocholithiasis. CASE DESCRIPTION/METHODS: An 83-year-old lady was brought to the hospital with one day of slurred speech and right-sided weakness. Stroke workup was negative, her symptoms resolved rapidly, and she was diagnosed with a TIA. GI service was consulted for elevated liver enzymes. Patient reported decreased appetite for a few weeks with some weight loss. Denied fevers, chills, nausea, vomiting, jaundice, pruritis, dark urine, pale stools, new medications, alcohol abuse, or Tylenol use. She was a 15-pack year active smoker. On exam, she was afebrile with stable vitals and mild epigastric tenderness. Lab work up showed WBC 15.9 with a left shift. CMP noted TBili 3.6 (Conjugated 1.4), AST 442, ALT 260, ALP 645, Lipase 57. RUQ US showed cholelithiasis and a dilated CBD (7.3 mm). MRCP revealed mild diffuse intrahepatic and extrahepatic biliary dilatation, multiple small stones within a 1.6cm CBD with appropriate tapering at the ampulla. ERCP revealed 2-3 cm nodular cratered ulceration with irregular heaped up margins adjacent to the Ampulla of Vater. Patient underwent papillotomy, stone extraction, and placement of a fully covered wall stent. Tumor markers noted CA19-9 of 50. Pathology showed infiltrating poorly-differentiated adenocarcinoma with signet-ring cell features of the Ampulla of Vater. Tumor cells were positive for CK7, CK19, CK20, CDX2, pan keratin, MUC-1, MUC-2; and negative for MUC-6 by immunohistochemistry (IHC). After extensive discussion of findings, treatments options with multidisciplinary team including surgical oncology and palliative care services, patient declined surgical intervention and decided to spend her remaining days at home. DISCUSSION: A signet-ring variant of the adenocarcinoma of the Ampulla of Vater is an extremely rare neoplasm. This is a unique case of a lady with concomitant choledocholithiasis incidentally found to have SRCC of the Ampulla of Vater. Given the rarity of these cases, special staining and IHC will add to our knowledge of the origins of these neoplastic cells and help tailor future therapeutics.Figure 1.: Histological examination of biopsied specimen in high power view showing atypical infiltrating cells with eccentric nuclei and intra-cytoplasmic mucin.Figure 2.: Histological examination showing adenocarcinoma with characteristic signet ring cells.Figure 3.: Histological examination at lower power with signet ring cell adenocarcinoma tumor infiltration.

Expression And Scoring Of HER2/Neu in Variants of Prostate Adenocarcinoma

Objective: To evaluate the immunohistochemical expression and scoring of HER2/neu in different variants of adenocarcinoma of prostate and to compared the association of HER2/neu expression with biological behavior and risk factors of prostate adenocarcinoma. Study Design and Setting: Cross sectional study in which all clinically suspected prostate adenocarcinoma cases received at the laboratory Saddar Karachi during the years 2015 and 2016 were evaluated for morphological features of adenocarcinoma. Methodology: This cross sectional study was carried out using prostate biopsies of clinically suspected prostate adenocarcinoma. The diagnosis of adenocarcinoma was confirmed and histological characterization was done by evaluating the morphological features. The tumors were graded according to the revised 2015 Gleason’s grouping. Immunohistochemical analysis for HER2/neu expression was performed in the most representative tumor block. SPSS version 22 was used for data analysis. Mean frequency and percentages were calculated for quantitative variables, whereas chi-square test and Fisher’s Exact Test were applied for qualitative variables. P-value of < 0.05 was considered as significant. Results: Out of 77 biopsies only one showed moderate HER2/neu expression. Positive HER2/neu was acinar variant. No significant statistical association was observed between expression of HER2/neu and prostate cancer variants. The positive case had age more than 60 years with moderately increased serum PSA levels and was aggressive in nature at the time of diagnosis. Conclusion: It was concluded from the study that HER2/neu was rarely expressed in prostate adenocarcinoma

A case of pure foamy gland carcinoma of prostate on needle core biopsy

Pure foamy gland carcinoma in prostate needle biopsy is seldom encountered. Majority of the prostatic carcinoma cases are acinar type adenocarcinoma. The features of classic acinar adenocarcinoma like large nuclei, prominent nucleoli and infiltrative pattern are not seen in most of the cases of foamy gland carcinoma. Foamy gland carcinoma (FGC) is composed of cells with characteristic abundant foamy cytoplasm and low N:C ratio. These low-grade FGC can mimic benign prostatic glands and thus serve as a diagnostic challenge. We here report a case of pure foamy gland variant of adenocarcinoma diagnosed on TRUS biopsy.

Hereditary and Sporadic Pancreatic Ductal Adenocarcinoma: Current Update on Genetics and Imaging.

Pancreatic ductal adenocarcinoma (PDAC) is a genetically heterogeneous, biologically aggressive malignancy with a uniformly poor prognosis. While most pancreatic cancers arise sporadically, a small subset of PDACs develop in patients with hereditary and familial predisposition. Detailed studies of the rare hereditary syndromes have led to identification of specific genetic abnormalities that contribute to malignancy. For example, germline mutations involving BRCA1, BRCA2, PRSS1, and mismatch repair genes predispose patients to PDAC. While patients with Lynch syndrome develop a rare "medullary" variant of adenocarcinoma, intraductal papillary mucinous tumors are observed in patients with McCune-Albright syndrome. It is now well established that PDACs originate via a multistep progression from microscopic and macroscopic precursors due to cumulative genetic abnormalities. Improved knowledge of tumor genetics and oncologic pathways has contributed to a better understanding of tumor biology with attendant implications on diagnosis, management, and prognosis. In this article, the genetic landscape of PDAC and its precursors will be described, the hereditary syndromes that predispose to PDAC will be reviewed, and the current role of imaging in screening and staging assessment, as well as the potential role of molecular tumor-targeted imaging for evaluation of patients with PDAC and its precursors, will be discussed. Keywords: Abdomen/GI, Genetic Defects, Oncology, Pancreas Supplemental material is available for this article. © RSNA, 2020.

Surgically Managed Signet Ring Cell Esophageal Carcinomas in the National Cancer Database

Signet ring cell adenocarcinoma (SRC) is a less common histologic variant of esophageal adenocarcinoma (ACA). The low frequency of SRC limits the ability to make data-driven clinical recommendations for these patients. The National Cancer Database was queried for adult patients with clinical stage I, II, or III adenocarcinoma of the noncervical esophagus diagnosed between 2004 and 2015 and stratified by SRC versus all other ACA variants. Cox proportional hazard regression models were adjusted for patient, tumor, and treatment characteristics. The role of surgery in SRC was evaluated among patients treated with chemoradiation alone versus chemoradiation with esophagectomy. Of the 681 SRC and 13,543 ACA patients who underwent esophagectomy, no significant differences in age, sex, race, or comorbidities were identified. Patients with SRC were more likely to have high-grade tumors (84% vs 41%, P < .001) and stage III tumors (47% vs 39%, P< .001) compared with patients with ACA. Complete (R0) resection was less common in SRC (81% vs 90%, P<.001). Adjusted 5-year mortality risk from surgery was higher for SRC patients compared with ACA patients (hazard ratio, 1.242; 95% confidence interval, 1.126-1.369; P<.001). Among SRC tumors, chemoradiation with esophagectomy was associated with superior survival (hazard ratio, 0.429; 95% confidence interval, 0.339-0.546; P<.001) compared with chemoradiation alone. Among surgically managed patients SRC appears to have a worse prognosis than ACA, which may reflect the tendency of SRC tumors to be higher grade and more locally advanced. However SRC histology does not appear to diminish the role of esophagectomy in the management of locoregionally confined esophageal cancer.

Mutation of EGFR in Non-small Cell Lung Cancer, a Regional Study in Upper Egypt

Management of non-small cell lung cancer has been changed dramatically since detection of EGFR mutation. The rate of EGFR mutation in Upper Egypt is unknown. In this study; EGFR mutation in non-small cell lung cancer tissue was evaluated and correlated with clinicopathological features of the tumors. Tissue samples of non-small cell lung cancer that had been confirmed by histopathological and immunohistochemical examinations were evaluated for mutation of EGFR by StripAssay. Thirty four patients with non-small cell lung cancer; 21 males and 13 females with a mean age of 55.94 years were included in this study. The median tumor size was 6.0cm and more than half of the tumors were classified as T3. Fourteen patients had N2 nodal stage and 19 patients had either malignant pleural effusion or distant metastasis. The majority of the tumors were adenocarcinomas and half of them were grade II. The two year survival rate of the patients was 70.6% and the overall survival was 58.8%. EGFR mutation was recorded in 44.1% of the tumors; all of which were adenocarcinoma variant. The mutation was significantly more frequent in large sized tumors and it was relatively associated with poor survival. Mutation of EGFR was not associated with patients` age, sex, tumor grade, T stage, N stage or status of distant metastasis. The rate of EGFR gene mutation in non-small cell lung cancer in Upper Egypt is relatively high and target therapy based on these mutations could improve patients` outcome.

Primary mucinous carcinomas of the lung: Clinical characteristics and treatment outcomes.

Introduction:Invasive mucinous adenocarcinoma (IMA) of the lung is a distinct histologic variant of adenocarcinomas comprising about 2%–10% of lung adenocarcinomas. A large proportion of IMAs carry KRAS mutations and only rarely epidermal growth factor receptor (EGFR) mutations or ALK/ROS translocations; thus, most cases are not amenable for targeted therapy at present. This study was conducted to elicit the unique clinicopathological characteristics of IMA.Materials and Methods:Medical records of patients diagnosed with IMA by needle biopsy at Kidwai Cancer Institute, Bangalore, from 2013 to 2018, were retrieved and reviewed. Statistical analysis was performed using SPSS version 23.0 (IBM Corp., Armonk, NY, USA).Results:Four hundred and ninety cases of needle biopsy of the lung were diagonosed at our institute between January 2013 and December 2018. Nine cases (1.8%) were diagnosed as IMA. The median age of presentation was 59 years. Six (66.7%) were current smokers with pack-year > 20. Three (33.3%) of the cases were initially misdiagnosed as pneumonia in view of computed tomography findings. The lung was the most common site of metastasis (77.8%). Serum Carcinoembryonic Antigen (CEA) was elevated in six cases (66.7%). None of the cases had any driver mutations in EGFR gene or ALK and ROS1 translocations. All cases were treated with pemetrexed–carboplatin doublet followed by pemetrexed maintenance till progression. The median progression-free survival (PFS) was 15 months (range: 5–18 months). Docetaxel was given as the second-line chemotherapy in all progressed patients. Best response noted was stable disease, seen in 4 (57.1%) cases. The median PFS for docetaxel was 6 months (range: 3–8 months). The median overall survival was 22 months (range: 9–27 months). Patients with initially raised CEA at progression had a serial rise in serum CEA.Conclusions:IMA is rarely diagnosed on needle biopsies due to insufficient tissue. They mimic pneumonia on imaging, thus delaying diagnosis. EGFR mutations, ALK, and ROS1 translocations are usually negative making them ineligible for tyrosine kinase inhibitors. Response to chemotherapy is modest.

Micropapillary urothelial carcinoma of urinary bladder displays immunophenotypic features of luminal and p53-like subtypes and is not a variant of adenocarcinoma

ObjectivesMicropapillary urothelial carcinoma of the urinary bladder (MPUC) is a rare variant of urothelial carcinoma which has aggressive clinical characteristics. The objective is to investigate the molecular subtypes of MPUC and the impact to the clinical outcome and determine whether MPUC represents a variant of adenocarcinoma. Materials and MethodsWe evaluated surrogate immunohistochemical markers of luminal, basal, and p53-like subtypes and correlated with prognosis and the expression of markers related to bladder adenocarcinoma and glandular differentiation in 56 cases of MPUC (10 cases of transurethral resection and 46 cases of radical cystectomy). Biomarker expression in co-existing conventional urothelial carcinoma was also analyzed. Cox regression analysis was performed to study the impact of molecular subtype on the clinical outcome. ResultsThirty-four cases (61%) met criteria for the luminal subtype. Twenty-two cases (39%) displayed a p53-like subtype. In contrast, 40/56 (71%) cases of coexisting conventional urothelial carcinoma were classified as luminal subtype and 16/56 (29%) cases were designated as p53-like subtype. There was no significant survival difference between luminal subtype and p53-like subtype. CDX2, villin, and cadherin 17 were negative in all cases. MUC1 was strongly and diffusely expressed in the stroma-facing surface of MPUC tumor cells in all the cases. ConclusionsOur findings suggest that MPUC possesses characteristics of luminal and p53-like subtypes, and does not harbor phenotypic features of the basal subtype. There is no significant difference in the prognosis between luminal and p53-like subtype MPUC. MPUC is not a variant of adenocarcinoma and does not represent a form of glandular differentiation, in contrast to other organ sites.

Plasmacytoid acinar adenocarcinoma of the prostate: a newly described variant of prostate cancer

A plasmacytoid variant of prostatic adenocarcinoma has not been reported to the best of our knowledge. A 54-year-old male presented with recurrent attacks of acute urinary retention. Laboratory findings showed high creatinine and a serum prostate specific antigen of 50.7 μg/L. Magnetic Resonance Imaging showed a locally advanced tumor involving the bladder and extending to the base of prostate with bilateral ureterovesical junction involvement and invasion of the left seminal vesicle and left anterior mesorectal fascia as well as perirectal fat invasion. Diffuse metastases to the abdominopelvic lymph nodes were identified. Bone scintigraphy showed multiple bone metastases. Transrectal ultrasound guided biopsy of the prostate was attempted but the patient could not tolerate the procedure and the procedure was canceled. The patient then underwent transurethral resection of bladder tumor. Microscopic examination showed sheets of malignant cells with prominent plasmacytoid appearance undermining benign urothelium. The tumor cells were positive for PSA, PSAP, NKX 3.1 and Cytokeratin 8/18. The tumor cells were negative for P63, Cytokeratin 34βE12, Cytokeratin 20, Desmin, CD38, Kappa and Lambda light chains, Chromogranin, Synaptophysin, GATA 3, E-cadherin and CD45. INI1 was retained. Next generation sequencing showed an intermediate tumor mutational burden. Notably, no genomic alterations in the CDH1 gene (encoding for E-cadherin) were present. The patient showed some initial response to antiandrogen therapy with a drop in serum PSA levels following androgen deprivation therapy. However, the patient died 6 months after diagnosis. It is critical to recognize this newly described variant and to distinguish it from plasmacytoid urothelial carcinoma. Recognition of the newly described plasmacytoid variant of adenocarcinoma of the prostate will lead to identification and reporting of more cases and a better understanding of its clinicopathologic features.

Primary Bartholin’s Gland Adenoid Cystic Carcinoma: Dilemmas Around Adjuvant Treatment

Adenoid cystic carcinoma is an uncommon variant of adenocarcinoma arising from Bartholin’s gland. They are malignant tumours with deceptively benign histologic appearance, indolent clinical course with high chance of recurrence and rare distant metastases. Perineural invasion is more common, which may be attributable to the high chance of recurrence. The symptoms are entirely non-specific and hence often get misdiagnosed as cyst or abscess. There is no clear consensus regarding the optimal treatment guidelines. The role of adjuvant chemotherapy and radiotherapy is also unclear. We report a case of Bartholin’s gland adenoid cystic carcinoma in a postmenopausal woman.

Primary vaginal adenocarcinoma of intestinal-type: case report of a rare gynaecological tumour.

ABSTRACTVaginal cancer is rare and accounts for only 1 to 2% of all gynaecological malignancies. They arise as primary squamous cell cancers or are the result of extension from the cervix or vulva. Primary mucinous vaginal adenocarcinoma of intestinal-type is an extremely rare malignancy of unknown histogenesis with a diagnostic dilemma for the clinician and histopathologist. We presented the case of a 40-year-old Para 0+2 woman with the complaint of a mass in the vagina and recurrent vaginal bleeding who was evaluated and worked-up for examination under anaesthesia and biopsy of the vaginal mass. The histological examination revealed the unusual intestinal-type variant of adenocarcinoma of the vagina. Recognition of this rare entity is important, particularly to avoid the pitfall of misdiagnosing metastatic disease as primary vaginal cancer.

Comparing histologic evaluation of prostate tissue using nonlinear microscopy and paraffin H&E: a pilot study

Rapid histological assessment of large areas of prostate tissue is required for many intraoperative consultation scenarios such as margin evaluation. Nonlinear microscopy (NLM) enables imaging of large (whole mount) specimens without freezing or cryotoming. This study demonstrates rapid histological imaging of unsectioned prostate cancer surgical specimens using nonlinear microscopy and compares features of prostate pathology to standard paraffin embedded H&E histology. Fresh or formalin fixed specimens were stained in 2.5 min with fluorescent nuclear and stromal dyes. Nonlinear microscopy images of unsectioned tissues were generated by nonlinear (two-photon) excitation of the fluorophores, where fluorescence is only emitted from tissue at the microscope focus, avoiding the need for physical sectioning. The images were displayed in real time using a color scale similar to H&E, then tissues were processed for standard paraffin embedded H&E histology. Seventy nonlinear microscopy and corresponding paraffin H&E images of fresh and fixed prostate specimens (15 cancer, 55 benign) from 24 patients were read by genitourinary pathologists to assess if nonlinear microscopy could achieve an equivalent evaluation to paraffin embedded H&E histology. Differences between nonlinear microscopy images and paraffin H&E slides, including cytoplasmic color and stromal density, were observed, however nonlinear microscopy images could be interpreted with minimal training. Nonlinear microscopy enabled visualization of benign, atrophic and hyperplastic glands and stroma, ejaculatory ducts, vasculature and inflammatory changes. Nonlinear microscopy enabled identification of typical and variants of adenocarcinoma, as well as Gleason patterns. Perineural invasion and extraprostatic extension could also be assessed. Nonlinear microscopy images closely resemble paraffin H&E slides and enable rapid assessment of normal prostate architecture, benign conditions, and carcinoma in freshly excised and fixed specimens. Nonlinear microscopy can image large regions of tissue, equivalent to multiple frozen section tissue blocks, within minutes because cryotoming/microtoming are not required, making it a promising technique for intraoperative consultation.

Detection of HPV RNA molecules in stratified mucin-producing intraepithelial lesion (SMILE) with concurrent cervical intraepithelial lesion: a case report

BackgroundStratified mucin-producing intraepithelial lesion (SMILE) is a rare precursor lesion in the uterine cervix that is considered a variant of adenocarcinoma in situ (AIS). Although human papillomavirus (HPV) is thought to be related to the development of SMILE, there is little information available on the detection of HPV integrated into the lesion.Case presentationA 30-year-old female underwent a routine uterine cervical cancer screening, and her Pap smear indicated the possible existence of atypical glandular cells. A cervical biopsy with endocervical curettage was performed. The histopathological analysis showed that she had SMILE and high-grade squamous intraepithelial lesion (HSIL) on her cervix. The lesion was found to be positive for HPV genotypes 52 and 68 by multiplex PCR. In situ hybridization with HPV RNA probes revealed that these HPV types were involved in the onset of HSIL and SMILE, respectively.ConclusionsRare, high-risk HPV genotypes may contribute to the development of SMILE, and their detection can be useful for preventing the progression to carcinoma and ensuring adequate patient management.

Micropapillary Cervical Adenocarcinoma: A Clinicopathologic Study of 44 Cases.

Micropapillary adenocarcinoma has been reported as an aggressive variant of adenocarcinoma in several organs, where it is associated with poor clinical outcome. This study reports the clinicopathologic features and outcomes of cervical adenocarcinomas with a micropapillary component (micropapillary cervical adenocarcinomas); this represents the largest reported study of these neoplasms. The study comprised 44 cervical adenocarcinomas of usual (human papillomavirus-related)-type (84%), mucinous, not otherwise specified (4.5%), gastric-type (4.5%), endometrioid (4.5%), and adenosquamous carcinoma (2%). The micropapillary component comprised >50% of the neoplasm in 34 cases (77%) (group 1), and 10% to 50% in 10 cases (23%) (group 2). Lymph node metastasis was present in 41 of 44 (93%) cases and typically the nodal tumor retained a prominent micropapillary morphology. Follow-up ranged from 7 to 123 months (mean, 65.9 mo). Seventeen of 44 (38.6%) patients had no evidence of disease on follow-up, 6/44 (13.6%) were alive with disease, and 21/44 (47.7%) died of disease. There were no survival differences between group 1 and group 2. On univariate analysis, lymph node metastasis (P=0.0015), lymphovascular space invasion (P=0.002), parametrial involvement (P=0.03), and depth of stromal invasion (P=0.045) were related to tumor recurrence. On multivariate analysis, lymph node metastasis (P=0.001), and extent of lymphovascular space invasion (P=0.027) were significant independent predictors of tumor recurrence. Our study shows that a micropapillary component in cervical adenocarcinoma may be associated with aggressive behavior and that a micropapillary architecture may occur within a variety of types of cervical adenocarcinoma.

Gastrointestinal Carcinoma with Plasmacytoid Morphology: Positivity for c-MET, Arylsulfatase, and Markers of Epithelial-Mesenchymal Transition, as Indicators of Aggressivity.

Background Plasmacytoid urothelial carcinoma is a rare and aggressive histologic variant of high-grade carcinoma of the urinary bladder. Few than 250 cases have been reported in the urinary bladder till January 2019. In this paper, a case series of unusual gastrointestinal carcinomas with plasmacytoid morphology was included. Only one similar case of the stomach was previously published and no such cases were found in colon. Methods We present the complex immunoprofile, using a panel of 39 biomarkers, of the largest group of primary gastrointestinal carcinomas with plasmacytoid morphology reported in literature (one from upper rectum and six from stomach). Results All of the seven cases showed lymph node metastases and only one survived over 25 weeks after surgical excision. The indicators of aggressivity were age (over 60), advanced stage (from IIIA to IV), E-cadherin negativity, and vimentin positivity. The immunoprofile indicated unfavorable prognosis for mesenchymal-type carcinomas (negativity for E-cadherin and positivity for vimentin, with membrane to nuclear translocation or negativity of β-catenin). The survivor showed an “epithelial-type adenocarcinoma with plasmacytoid dedifferentiation”, with membrane positivity for E-cadherin and β-catenin and vimentin negativity. All of the cases expressed c-MET and were negative for HER-2. Conclusions Primary carcinoma with plasmacytoid morphology is a dedifferentiated variant of adenocarcinoma or poorly cohesive carcinomas. Vimentin positive dedifferentiated-poorly cohesive carcinomas should be considered as mesenchymal-type highly malignant carcinomas. This rare histologic variant of gastrointestinal cancer might respond to anti-c-MET tyrosine kinases.

Comprehensive molecular profiling of signet-ring-cell carcinoma (SRCC) from the stomach and colon.

63 Background: Signet ring cell carcinoma (SRCC) is a rare variant of adenocarcinoma, accounting for about 10% of gastric cancer (GC) and 1% of colorectal cancer (CRC). SRCC is associated with poor prognosis, however little is known about the underlying molecular characteristics. Herein, we aimed to characterize the molecular features of SRCCs, and to compare the molecular profile of SRCC to adenocarcinoma; further, we assessed the impact of tumor location on the molecular profile of SRCC. Methods: SRCCs were analyzed using NGS (MiSeq on 47 genes, NextSeq on 592 genes), immunohistochemistry, and in-situ hybridization. Tumor mutational burden (TMB) was calculated based on somatic nonsynonymous missense mutations, and microsatellite instability (MSI) was evaluated by NGS of known MSI loci. Chi-square and t-tests were used for comparative analyses. Results: A total of 8,500 CRC and 1,100 GC were screened for SRCC histology. Seventy-six SRCC were identified from the CRC cohort (&lt;1%) and 98 from the GC cohort (9%). The most frequently mutated genes in CRC-SRCC were TP53 (47%), ARID1A (26%), APC (25%), KRAS (22%), RFN43 (16%), KMT2D (12%), KMT2C (11%), SMAD4 (10%) and BRAF (10%), while in GC-SRCC were TP53 (42%), ARID1A (27%), CDH1 (11%), BAP1 (7%), PIK3CA (7%), ERBB2 (5%). When compared to non-SRCC histology (N=3522), CRC-SRCC (N=37) showed more frequently mutation in BRCA1 (11% vs 1%, P &lt; .001) and less mutation in APC (19% vs 78%, P &lt; .001), KRAS (22% vs 51%, P = .001) and TP53 (47% vs 73%, P = .001). Among GC cohort, SRCC (N=54) had a higher frequency of mutations in CDH1, BAP1, and ERBB2, and higher rate of amplification MYB compared to non-SRCC (N=540), although none of these differences were statistically significance. When we compared GC-SRCC vs. CRC-SRCC, only the mutation rate in APC (0% vs 25%) and KRAS (2% vs 22%) genes were significantly different (P &lt; .001). Conclusions: Our research is the first to comprehensively characterize the molecular features of SRCC. Our data suggest that SRCCs harbor similar molecular profile, regardless the tumor location. On the other hand, significant differences were observed between SRCCs and non-SRCC tumors, therefore tailored therapy should be provided to these patients.

Cytologic patterns of cervical adenocarcinomas with emphasis on factors associated with underdiagnosis.

BackgroundNew cervical cancers continue to be diagnosed despite the success of Papanicolaou (Pap) tests. In an effort to identify pitfalls that limit the diagnosis of adenocarcinoma, the authors reviewed the cytologic characteristics of endocervical adenocarcinomas in their patient population.MethodsLiquid‐based cytology slides from 45 women who had concurrent, histologically confirmed cervical adenocarcinomas were reviewed retrospectively and semiquantitatively for 25 key cytologic traits. The original sign‐out diagnosis, available clinical findings, and high‐risk human papillomavirus (HR HPV) results also were noted.ResultsAbundant tumor cellularity, nuclear size from 3 to 6 times normal, abundant 3‐dimensional tumor cell groups, round cell shape, and cytoplasmic neutrophils characterized the 23 cases that were identified correctly as adenocarcinomas. Key reasons for undercalls included low tumor cellularity and low‐grade columnar morphology; these also tended to correlate with low‐grade or unusual adenocarcinoma variants on histology. Overall, 73% of adenocarcinomas had a concurrent positive HR HPV test.ConclusionsMost endocervical adenocarcinomas can be diagnosed accurately in cases with classical features, but some cases continue to be problematic when evaluated based on cytologic features alone. Reflex HPV testing may help increase Pap test sensitivity for challenging cases that have atypical glandular cells of undetermined significance. Occasional cases with negative HR HPV test results remain of concern.

Invasive micropapillary carcinoma component is an independent prognosticator of poorer survival in Stage III colorectal cancer patients.

Invasive micropapillary carcinoma (IMPC) is an aggressive variant of adenocarcinoma found in several organs. Recent studies showed that IMPC in colorectal cancer leads to poorer prognosis than conventional colorectal cancer; however, the influence of IMPC on outcomes remains unclear. The present study aimed to identify the clinicopathological characteristics of colorectal cancers with IMPCs, and to evaluate the prognostic significance of IMPCs per se. We retrospectively analyzed data from 837 patients with colorectal cancer who underwent surgical treatment. We compared the clinicopathological characteristics and survival outcomes of colorectal cancer patients with IMPCs to those without. Among 837 patients, 130 (16%) had an IMPC component, including 0 (0%) of 18, 9 (4.2%) of 215, 34 (13%) of 254, 59 (24%) of 249 and 28 (27%) of 101 patients with TNM Stages 0, I, II, III and IV, respectively. The 3-year disease-free survival (DFS) rates were significantly worse for Stage III patients with IMPC than for those without (55.3% vs. 78.7% respectively, P < 0.001), but not in patients with other stages. Multivariate analyses of patients with Stage III colorectal cancer found IMPC to be associated with significantly worse DFS (P = 0.026), as were high CEA levels, tumor budding and TNM staging. IMPC was only significantly associated with tumor invasion (P = 0.045) and venous invasion (P = 0.045) in Stage III tumors. Identifying IMPC components in Stage III colorectal cancer is crucial, as their presence is significantly associated with poorer survival.

A study of appendiceal crypt cell adenocarcinoma (so-called goblet cell carcinoid and its related adenocarcinoma)

Goblet cell carcinoids (GCCs) of the appendix are rare tumors, characterized by a carcinoid-like organoid growth pattern. Despite the term carcinoid, neuroendocrine features are inconspicuous, and its behavior is distinct from carcinoid. Its high-grade counterpart is designated as adenocarcinoma ex GCC. We conducted a retrospective study of 105 tumors to find prognostic values of a variety of clinicopathologic features. The tumors were subclassified as low grade, equivalent to classic type, and high grade, defined as loss of organoid pattern, and a proportion (%) of low and high grades were documented in each tumor. Correlations between survival and various clinicopathologic parameters were investigated. One-third were pure low grade, while the remainder contained variable high-grade component ranging from 5% to 95%. Neuroendocrine cell component ranged from 0% to 90% (median, 5), while mucus cell component ranged from 5% to 100% (median, 70). By univariate analysis, size, stage, high-grade component, nuclear grade, surgery, and chemotherapy correlated with cancer-related survival (CSS), and by multivariate analysis, stage (P=.001), high-grade component (P=.008), and tumor size (P=.005) correlated with CSS. There was significant difference in CSS when the cases were grouped by high-grade component: <40%, 40% to 90%, and ≤90% (P<.001). Our results indicate that staging and proportion of high-grade histology may provide important prognostic information. Neuroendocrine component was insignificant in both low- and high-grade areas. In light of our findings, this tumor type is best regarded as a variant of adenocarcinoma, and the term crypt cell adenocarcinoma more appropriately reflects the nature and origin of this tumor group.

Ductal variant of prostate adenocarcinoma harbor Xenotropic murine leukemia virus related virus (XMRV) infection: a novel finding in subtype of prostate cancer.

Xenotropic murine leukemia virus related virus (XMRV), is the first gammaretrovirus identified a decade ago, in human tissue bearing adenocarcinoma of prostate, followed by several researches documenting little or no prevalence of XMRV in prostate cancer samples. However, the status of XMRV within subtype of prostate adenocarcinoma has not been investigated yet. In this study, we investigated the relationship between XMRV and broad spectrum morphological entities of prostate adenocarcinoma, including acinar, ductal and other rare subtypes. The prevalence of XMRV DNA in different histological subtypes of prostate adenocarcinoma was examined after characterizing the tumors into groups, using formalin-fixed, paraffin-embedded tissue samples from newly diagnosed prostate adenocarcinomas and archival prostate cancer tissue from our XMRV case control analysis. Broad-spectrum XMRV DNA amplification was performed by end-point polymerase chain reaction, using commercially available primer set. The study included 100 patients with prostate cancer. XMRV DNA was detected in 4 of 8 (50%) ductal adenocarcinomas, exhibiting papillary and cribriform histological features. XMRV DNA was not detected in any other variant of adenocarcinoma including acinar (0/91) and mucinous carcinomas (0/1). Majority of XMRV positive cases were biologically aggressive and present cancer at an early age upon diagnosis. Ductal adenocarcinomas demonstrate a significant association of XMRV DNA while other histological variants of prostate adenocarcinoma seem unrelated to XMRV infection.