scholarly journals Polyploid monolayer Ishikawa endometrial cells form unicellular hollow spheroids capable of migration

2018 ◽  
Author(s):  
Honoree Fleming
Keyword(s):  
Petri Dish ◽  
Signet Ring Cell ◽  
Polyploid Cell ◽  
Central Vacuole ◽  
Signet Ring Cells ◽  
Endometrial Cells ◽  
Short Period ◽  
The Family ◽  
Signet Ring ◽  
Ring Cell

The results in this paper demonstrate that Ishikawa endometrial monolayer cells become multinucleated by a process of nuclear “donation” from neighboring cells. As the resulting polyploid cell detaches from the colony in which it was formed, it is possible to detect mitonucleon(s) in the center of the cell. The mitonucleon is a transient mitochondrial superstructure surrounding aggregated chromatin (Fleming et al. 1998) with characteristics of the family of mitochondrial superstructures that are sometimes called spheroids or cup-shaped mitochondria (Fleming, 2016a). As was recently demonstrated gas vacuoles form within mitonucleons (Fleming, 2018). In the free-floating single cell, the retained gas creates a central vacuole, and the cell becomes a spheroid that floats above the monolayer. It resembles a “signet ring cell” in being characterized by a central vacuole and chromatin compressed against the vacuole membrane. The resulting structure is a spheroids that is hollow and unicellular, albeit polyploid. But whereas signet ring cells are assumed to be undergoing apoptosis, that is not the case for unicellular spheroids. Complete spheres with chromatin and cytosolic cell contents compressed against the cell membrane can be found floating independently above Ishikawa monolayers. When an isolated sphere settles back onto the surface of the petri dish, it is possible to observe dissipating gas bubbles within the now flattened sphere for a short period of time. When the gas is discharged the resulting cell looks like a typical giant polyploid cell.

scholarly journals Polyploid monolayer Ishikawa endometrial cells form unicellular hollow spheroids capable of migration

2018 ◽  
Author(s):  
Honoree Fleming
Keyword(s):  
Petri Dish ◽  
Signet Ring Cell ◽  
Polyploid Cell ◽  
Central Vacuole ◽  
Signet Ring Cells ◽  
Endometrial Cells ◽  
Short Period ◽  
The Family ◽  
Signet Ring ◽  
Ring Cell

The results in this paper demonstrate that Ishikawa endometrial monolayer cells become multinucleated by a process of nuclear “donation” from neighboring cells. As the resulting polyploid cell detaches from the colony in which it was formed, it is possible to detect mitonucleon(s) in the center of the cell. The mitonucleon is a transient mitochondrial superstructure surrounding aggregated chromatin (Fleming et al. 1998) with characteristics of the family of mitochondrial superstructures that are sometimes called spheroids or cup-shaped mitochondria (Fleming, 2016a). As was recently demonstrated gas vacuoles form within mitonucleons (Fleming, 2018). In the free-floating single cell, the retained gas creates a central vacuole, and the cell becomes a spheroid that floats above the monolayer. It resembles a “signet ring cell” in being characterized by a central vacuole and chromatin compressed against the vacuole membrane. The resulting structure is a spheroids that is hollow and unicellular, albeit polyploid. But whereas signet ring cells are assumed to be undergoing apoptosis, that is not the case for unicellular spheroids. Complete spheres with chromatin and cytosolic cell contents compressed against the cell membrane can be found floating independently above Ishikawa monolayers. When an isolated sphere settles back onto the surface of the petri dish, it is possible to observe dissipating gas bubbles within the now flattened sphere for a short period of time. When the gas is discharged the resulting cell looks like a typical giant polyploid cell.

Cytology Detects Endobronchial Metastasis from Appendiceal Signet-Ring Cell Carcinoma in the Absence of Radiographic Lung Masses: A Case Report

2021 ◽  
Vol 156 (Supplement_1) ◽  
pp. S44-S44
Author(s):  
B W Taylor ◽  
K Hummel ◽  
Y Xu
Keyword(s):  
Case Report ◽  
Respiratory Distress ◽  
Cell Carcinoma ◽  
Signet Ring Cell Carcinoma ◽  
Signet Ring Cell ◽  
Signet Ring Cells ◽  
Endobronchial Metastasis ◽  
Signet Ring ◽  
Ring Cell ◽  
The Right

Abstract Introduction/Objective Endobronchial metastasis (EBM) is uncommon, with a reported prevalence of 2% in cases of non-lung primary malignancies. The most frequently observed carcinomas in EBM are from breast, colon, and renal origins. We present a rare case of endobronchial metastasis from a primary tumor of the appendix without lung masses by computed tomography (CT). Methods/Case Report An 83-year-old woman with signet-ring cell carcinoma of the appendix underwent right hemicolectomy and chemotherapy. Two years later, she returned with intractable nausea and vomiting, and respiratory distress. CT of the chest demonstrated diffuse bilateral pulmonary opacities without lung masses. CT of the abdomen showed peritoneal carcinomatosis. Cytology of ascitic fluid displayed metastasis of the patient’s known appendiceal tumor. Bronchoscopy found significant friable debris appearing to be tumor tissue and occluding multiple bronchioles in the right lung. A bronchoalveolar lavage (BAL) specimen from the right lung was sent for liquid-based cytology, which revealed a few atypical cells with eccentric nuclei and intracytoplasmic vacuoles, abundant macrophages, degenerated mixed inflammatory cells, and scattered bronchial epithelial cells. Cell block demonstrated signet-ring cells mimicking macrophages and infiltrating into small fragments of bronchiolar wall. The signet-ring cells were morphologically similar to those found in the ascitic fluid and the patient’s primary tumor, and were highlighted by mucicarmine stain and immunohistochemical stains for CDX-2 and CK20, but not CK7. Results (if a Case Study enter NA) N/A Conclusion Collectively, the findings supported the diagnosis of endobronchial metastasis of signet-ring cell carcinoma from the lower gastrointestinal tract, i.e. the patient’s known appendiceal primary. Our case demonstrates a rare endobronchial metastasis of a primary neoplasm of the appendix, an important diagnostic consideration when evaluating respiratory distress in patients with such cancer histories. We have described the significant role of BAL cytology to uncover endobronchial metastases without lung masses by CT, and illustrated the finding of signet-ring cells mimicking macrophages in a BAL cytology specimen.

Peculiar Artifacts Mimicking Carcinoma

2001 ◽  
Vol 125 (11) ◽  
pp. 1473-1476 ◽  
Author(s):  
Mark Li-cheng Wu ◽  
Sathima Natarajan ◽  
Klaus J. Lewin
Keyword(s):  
Cell Carcinoma ◽  
Signet Ring Cell Carcinoma ◽  
Signet Ring Cell ◽  
Clinical Correlation ◽  
Signet Ring Cells ◽  
Products Of Conception ◽  
Signet Ring ◽  
Ring Cell ◽  
Morphologic Analysis ◽  
Ancillary Studies

Abstract Artifacts that mimic malignancy may lead to diagnostic difficulty and can cause serious consequences. We present 2 cases received in consultation which demonstrated peculiar artifacts that closely mimicked carcinoma. In case 1, contaminating products of conception were confused with squamous cell carcinoma. In case 2, artifactual signet ring cells induced by procedural trauma were suspicious for signet ring cell carcinoma. In both cases, clinical correlation failed to completely exclude carcinoma, and limited tissue prevented use of ancillary studies. Our final resolution of these artifacts required lengthy and detailed morphologic analysis.

scholarly journals Primary mucinous adenocarcinoma of the bladder with signet-ring cells: case report

2007 ◽  
Vol 125 (5) ◽  
pp. 297-299 ◽  
Author(s):  
Marcelo Lorenzi Marques ◽  
Gabriel Salum D'Alessandro ◽  
Daher Cezar Chade ◽  
Valéria Pereira Lanzoni ◽  
Samuel Saiovici ◽  
...  
Keyword(s):  
Case Report ◽  
Mucinous Adenocarcinoma ◽  
Rare Case ◽  
Bladder Tumor ◽  
Colorectal Adenocarcinoma ◽  
Signet Ring Cell ◽  
Signet Ring Cells ◽  
Signet Ring ◽  
Ring Cell ◽  
Primary Bladder

CONTEXT: Primary adenocarcinomas of the bladder are uncommon and usually occur by contiguity with or hematogenic dissemination of other adenocarcinomas such as colorectal, prostate and gynecological tract carcinomas. Mucinous and signet-ring cell histological patterns are even rarer and it is often difficult to morphologically distinguish them from metastatic colorectal adenocarcinoma. CASE REPORT: We present and discuss a rare case of primary mucinous adenocarcinoma of the bladder with signet-ring cells in a 57-year-old male patient. Other primary sites for the tumor had been excluded and, in the absence of digestive tract tumor and for confirmation that it was a primary bladder tumor, an immunohistochemistry study was performed.

scholarly journals Signet-ring cells in the skin: a case of late-onset cutaneous metastasis of gastric carcinoma and a brief review of histological approach

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Özgür Gündüz ◽  
Mehmet Can Emeksiz ◽  
Pınar Atasoy ◽  
Mehtap Kıdır ◽  
Selim Yalçın ◽  
...  
Keyword(s):  
Clinical Course ◽  
Late Onset ◽  
Cutaneous Metastasis ◽  
Signet Ring Cell ◽  
Cutaneous Lesions ◽  
Signet Ring Cells ◽  
Internal Malignancy ◽  
Skin Cancers ◽  
Signet Ring ◽  
Ring Cell

Up to 10% of patients with visceral malignancies develop skin metastases during their clinical course and these metastases constitute about 2% of all skin cancers. Skin metastasis may be the first sign of a clinically silent visceral cancer or represent recurrence of an internal malignancy. In both situations, they are associated with poor prognosis, which can partly be attributed to underdiagnosis. In this paper, a case of relapsing gastric adenocarcinoma, which manifested itself as asymptomatic cutaneous papules and nodules on a patient’s head and neck, is reported and histopathological approach to the cutaneous lesions containing signet-ring cell is briefly reviewed.

scholarly journals Gastric epithelioid gastrointestinal stromal tumor with signet ring-like cell features: A case report

2020 ◽  
Vol 7 (1) ◽  
pp. 30
Author(s):  
Maria Cecilia Vivar ◽  
Evelyn Carolina Polanco Jacome ◽  
Adam James Robin
Keyword(s):  
Case Report ◽  
Gastrointestinal Stromal Tumor ◽  
Tumor Cells ◽  
Biopsy Specimen ◽  
Signet Ring Cell ◽  
Stromal Tumor ◽  
Current Case ◽  
Signet Ring Cells ◽  
Signet Ring ◽  
Ring Cell

A gastrointestinal stromal tumor (GIST) with signet ring cell features is a rare variant of epithelioid GIST. The current case demonstrates a 35-year-old woman with a 22.0 cm stomach mass. Tomography-guided core biopsy of the mass showed an undifferentiated tumor with abundant signet ring cells in a myxoid background. A preliminary diagnosis of adenocarcinoma was considered based on histomorphologic features; however, by immunohistochemistry studies the tumor cells were negative for cytokeratins and intensely positive for CD117/c-kit and CD34. Therefore a diagnosis of GIST with signet ring-like cells features was rendered. Making a diagnosis in a small biopsy specimen is always challenging, due to the variable histomorphological features of these tumors.

Signet-Ring Cell Adenocarcinoma of Sinonasal Tract: An Immunohistochemical Study of the Mucins Profile

2007 ◽  
Vol 131 (6) ◽  
pp. 961-964 ◽  
Author(s):  
Christine Castillo ◽  
David Buob ◽  
Geoffrey Mortuaire ◽  
Dominique Chevalier ◽  
Sebastien Aubert ◽  
...  
Keyword(s):  
Cell Carcinoma ◽  
P53 Protein ◽  
Signet Ring Cell Carcinoma ◽  
Signet Ring Cell ◽  
Sinonasal Tract ◽  
Intestinal Type ◽  
Signet Ring Cells ◽  
Signet Ring ◽  
Ring Cell ◽  
Mib 1

Abstract Context.—Adenocarcinomas of the sinonasal tract are classified into 4 categories: salivary-type, intestinal-type, nonintestinal-type, and metastatic. Signet-ring cell carcinoma is the rarest form of intestinal-type adenocarcinoma. Only isolated cases have been reported in the literature. Objective.—To evaluate clinical attributes, morphology, and immunohistochemistry in signet-ring cell carcinoma of the sinonasal tract. Design.—Seventy-three cases of primary sinonasal adenocarcinomas were retrieved from the files. Only 5 signet-ring cell adenocarcinomas (tumors composed of more than 90% signet-ring cells) were identified. In all cases, clinical data and histologic slides were available and were reviewed. Consecutive tissue sections were immunostained with monoclonal antibodies against MUC2, MUC5AC, MUC5B, MUC6, p53 protein, and MIB-1. Results.—Four of our 5 patients were woodworkers. They were treated by surgical excision and radiotherapy. Patient follow-up ranged from 11 to 84 months. Three patients presented an unfavorable evolution and died of metastatic spread. Microscopically, the tumors produced abundant mucin deposits, which accumulated in large extracellular pools. Tumor cells were predominantly signet-ring cells floating in the pools of mucin. The mucins profile was MUC2+, MUC5AC+, MUC5B+, and MUC6−. Eighty percent of cells were immunostained by p53 protein antibody and 60% cells with MIB-1 antibody. Conclusions.—The mucin profile is similar to the profile described in digestive tract adenocarcinoma. It is not useful to differentiate between metastatic adenocarcinoma and primary intestinal-type sinonasal adenocarcinoma. Clinical data and immunochemistry with p53 protein and MIB-1 confirm that sinonasal signet-ring cell carcinoma is a high-grade and aggressive tumor.

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