scholarly journals Biliary Adenofibroma of the Liver: Report of a Case and Review of the Literature

2010 ◽  
Vol 2010 ◽  
pp. 1-5 ◽  
Author(s):  
Alessandra Gurrera ◽  
Rita Alaggio ◽  
Giorgia Leone ◽  
Giuseppe Aprile ◽  
Gaetano Magro
Keyword(s):  
Histological Examination ◽  
Stromal Cells ◽  
Smooth Muscle Actin ◽  
Review Of The Literature ◽  
Fibrous Stroma ◽  
Epithelial Component ◽  
Von Meyenburg Complex ◽  
Biliary Adenofibroma ◽  
P53 Immunoreactivity ◽  
Cystic Mesothelioma

We herein report the clinicopathologic features of a rare case of biliary adenofibroma (BAF) of the liver in a 79-year-old man. Grossly, tumour presented as a well-circumscribed, 5.5-cm mass with a solid and microcystic appearance. Histological examination was typical of biliary adenofibroma, showing a proliferation of variable-sized tubulocystic structures embedded in a moderately cellular fibrous stroma. Immunohistochemistry, revealing immunoreactivity of the epithelial component to cytokeratins 7 and 19, was consistent with a bile duct origin. Notably, the stromal cells had a myofibroblastic profile, showing a diffuse and strong expression of vimentin and -smooth muscle actin. Differential diagnosis with Von Meyenburg complex, biliary adenoma, biliary cistadenoma, congenital biliary cystsy, and hepatic benign cystic mesothelioma is provided. The occasionally reported expression of p53 in biliary adenofibroma has suggested that this tumour could represent a premalignant lesion. The absence of both cytological atypia and p53 immunoreactivity in our case confirms that BAF is a benign tumour with an indolent clinical behaviour. However, a careful histological examination of BAF is mandatory because malignant transformation of the epithelial component has been documented in two cases.

scholarly journals Pulmonary Sclerosing Pneumocytoma: A Pre and Intraoperative Diagnostic Challenge. Report of Two Cases and Review of the Literature

Medicina ◽  
2021 ◽  
Vol 57 (6) ◽  
pp. 524
Author(s):  
Senia Maria Rosaria Trabucco ◽  
Debora Brascia ◽  
Gerardo Cazzato ◽  
Giulia De Iaco ◽  
Anna Colagrande ◽  
...  
Keyword(s):  
Stromal Cells ◽  
Progesterone Receptors ◽  
Review Of The Literature ◽  
Diagnostic Challenge ◽  
Intense Staining ◽  
Surgical Decision ◽  
Histological Heterogeneity ◽  
Benign Pulmonary Tumor ◽  
Surgical Decision Making ◽  
Representative Material

Pulmonary sclerosing pneumocytoma is a rare benign pulmonary tumor of primitive epithelial origin. Because of the unspecific radiological features mimicking malignancies and its histological heterogeneity, the differential diagnosis with adenocarcinoma and carcinoid tumors is still challenging. We report our experience of two cases of sclerosing pneumocytoma, as well as a review of the literature. Immunohistochemical findings showed intense staining of the cuboidal epithelial cells for cytokeratin-pool and TTF-1, with focal positivity for progesterone receptors. Round and spindle cells expressed positivity for vimentin, TTF-1 and focally for the progesterone receptor. Cytologic diagnosis of pulmonary pneumocytoma requires the identification of its dual cell population, made up of abundant stromal cells and fewer surface cells. Since the pre- and intraoperative diagnosis should guide surgical decision making, obtaining a sufficient specimen size to find representative material in the cell block is of paramount importance.

Follicle development in cryopreserved bitch ovarian tissue grafted to immunodeficient mouse

2012 ◽  
Vol 24 (3) ◽  
pp. 461 ◽  
Author(s):  
L. Commin ◽  
S. Buff ◽  
E. Rosset ◽  
C. Galet ◽  
A. Allard ◽  
...  
Keyword(s):  
Stromal Cells ◽  
Histological Analysis ◽  
Smooth Muscle Actin ◽  
Ovarian Tissue ◽  
Follicular Development ◽  
Slow Freezing ◽  
Angiogenic Factor ◽  
Muscle Actin ◽  
Once Daily

The present study evaluated: (1) in vivo follicular development in canine ovarian tissue after slow freezing and xenotransplantation; and (2) the use of erythropoietin (EPO) as an angiogenic factor to optimise the transplantation procedure. Frozen–thawed ovarian tissue from five bitches was grafted into severe combined immunodeficient (SCID) mice (n = 47) treated with or without EPO (500 IU kg–1, once daily for 3 days) (Groups A and B, respectively) and analysed after 0, 1, 8 or 16 weeks. Follicle grade, follicle density, follicle morphology and stromal cells density were assessed by histological analysis, whereas vascularisation of the graft was quantified by immunohistochemistry with anti-α-smooth muscle actin antibody. Despite a massive loss of follicles after grafting, secondary follicle density was higher at 8 and 16 weeks than at 1 week regardless of EPO treatment. EPO significantly improved early follicle morphology and stromal cell density after 8 weeks and blood vessel density at 16 weeks after transplantation (P < 0.05). Intact secondary follicles with more than three granulosa cells layers were observed 16 weeks after transplantation. The results suggest that canine ovarian tissue can be successfully preserved by our slow-freezing protocol because the tissue showed follicular growth after xenotransplantation. EPO treatment did not lessen the massive loss of follicles after transplantation.

Progressive neurological deficits with benign intracerebral cysts

1986 ◽  
Vol 65 (5) ◽  
pp. 706-709 ◽  
Author(s):  
Yoko Nakasu ◽  
Jyoji Handa ◽  
Kazuyoshi Watanabe
Keyword(s):  
Histological Examination ◽  
Computerized Tomography ◽  
Cyst Wall ◽  
Benign Lesion ◽  
Ct Scanning ◽  
Neurological Deficits ◽  
Review Of The Literature ◽  
Content Type ◽  
Ct Findings ◽  
Fine Print

✓ Two patients with benign intracerebral cysts are reported and a brief review of the literature is given. Although computerized tomography (CT) scanning is useful in detecting a variety of intracerebral cysts, the CT findings are not specific for any lesion. An exploratory operation with establishment of an adequate route of drainage and a histological examination of the cyst wall are mandatory in the management of patients with a progressive but benign lesion.

Benign cystic mesothelioma of the peritoneum in a child—case report and review of the literature

2011 ◽  
Vol 46 (4) ◽  
pp. e23-e26 ◽  
Author(s):  
Vikal Chandra Shakya ◽  
Chandra Shekhar Agrawal ◽  
Smriti Karki ◽  
Panna Lal Sah ◽  
Prakash Poudel ◽  
...  
Keyword(s):  
Case Report ◽  
Review Of The Literature ◽  
Cystic Mesothelioma

scholarly journals Case Report: A giant myopericytoma involving the occipital region of the scalp - a rare entity

F1000Research ◽  
2016 ◽  
Vol 5 ◽  
pp. 2905 ◽  
Author(s):  
Sunil Munakomi ◽  
Pramod Chaudhary
Keyword(s):  
Smooth Muscle ◽  
Case Report ◽  
Histological Examination ◽  
Rare Case ◽  
Smooth Muscle Actin ◽  
Positive Staining ◽  
Occipital Region ◽  
Rare Entity ◽  
Muscle Actin ◽  
Complete Excision

Herein we report a rare case of a giant myopericytoma presenting in a 16-year-old girl as a slowly progressive swelling involving the scalp in the occipital region. It was managed by complete excision. Histological examination of the lesion revealed  spindle-shaped cells forming characteristic rosettes around the blood vessels, and positive staining with smooth muscle actin.

Solitary Testicular Myofibroma: A Case Report and Review of the Literature

2005 ◽  
Vol 129 (10) ◽  
pp. 1322-1325
Author(s):  
Samson W. Fine ◽  
North J. Davis ◽  
Lawrence E. Lykins ◽  
Elizabeth Montgomery
Keyword(s):  
Case Report ◽  
Soft Tissues ◽  
Smooth Muscle Actin ◽  
Male Infant ◽  
Muscle Actin ◽  
Review Of The Literature ◽  
Infantile Myofibromatosis ◽  
Internal Organs ◽  
Mesenchymal Neoplasms ◽  
Spindle Cells

Abstract Myofibromas are benign mesenchymal neoplasms of myofibroblastic origin. Most present as solitary lesions at any age, but the presentation of multiple lesions in newborns and infants is known as infantile myofibromatosis. Multicentric lesions commonly involve soft tissues and bone and may involve internal organs, where they are associated with an unfavorable prognosis. Solitary lesions involving the viscera are rare. We report a case of a 3-month-old male infant with a left testicular mass detected during an evaluation for suspected torsion. The patient underwent orchiectomy, revealing a nodular mass with grossly evident foci of necrosis. Histologically, the lesion exhibited small fascicles of plump eosinophilic, smooth muscle actin–positive spindle cells, alternating with larger areas of primitive cells with vesicular nuclei and scant cytoplasm arranged around a hemangiopericytoma-like vasculature. To our knowledge, this is the first report of a myofibroma localized within the testis.

Primary Glomangioma of the Liver: A Case Report and Review of the Literature

2004 ◽  
Vol 128 (3) ◽  
pp. e46-e49 ◽  
Author(s):  
Vilkesh R. Jaiswal ◽  
Julie G. Champine ◽  
Suash Sharma ◽  
Kyle H. Molberg
Keyword(s):  
Tumor Cells ◽  
Smooth Muscle Actin ◽  
Vascular Network ◽  
Pericellular Matrix ◽  
Muscle Actin ◽  
Review Of The Literature ◽  
Deep Soft Tissue ◽  
Large Tumor ◽  
Glomus Tumors

Abstract Glomangiomas are a subset of glomus tumors that have a rich vascular network. Although a majority of the glomus tumors occur in the skin of the hand, they have also been reported in the deep soft tissue, bone, lungs, and gastrointestinal tract, especially the stomach. To our knowledge, only one such case has previously been reported primarily occurring in the liver. We report a case of a glomangioma primarily arising in the liver of a 57-year-old man who presented with right flank pain of several months' duration. A 3.0-cm hepatic mass was excised and consisted of numerous, small-to-medium branched vessels with the stroma containing small, round, regular cells with sharply outlined round-to-oval nuclei. Immunostains showed the tumor cells to be diffusely positive for vimentin and smooth muscle actin and to be focally positive for calponin. Collagen IV stained the pericellular matrix. The immunostain for CD34 highlighted the vascular network as well as outlined the tumor cells in many areas. Coexpression of actin and CD34 in glomus tumors, although unusual, has recently been reported in the literature. Despite its bland histology, the large tumor size and deep visceral location were suggestive of aggressive behavior; thus, a close clinical follow-up was recommended. The patient had an unremarkable postoperative course and has no evidence of metastatic disease 12 months after the procedure. An accurate diagnosis and an understanding the biology of this rare disease, especially in an unusual location, are crucial to its management.

Fibroadenoma Mimicking Papillary Carcinoma on ThinPrep of Fine-Needle Aspiration of the Breast

2000 ◽  
Vol 124 (11) ◽  
pp. 1667-1669
Author(s):  
Timothy Myers ◽  
Helen H. Wang
Keyword(s):  
Fine Needle Aspiration ◽  
Stromal Cells ◽  
Fine Needle Aspiration Cytology ◽  
Smooth Muscle Actin ◽  
Single Cells ◽  
False Negative ◽  
Needle Aspiration ◽  
Aspiration Cytology ◽  
Fine Needle ◽  
Needle Aspiration Cytology

Abstract Objective.—To compare and contrast benign and malignant lesions of the breast that have similar appearances on fine-needle aspiration cytology and that constitute diagnostic pitfalls. Design.—The cytology files (dated November 1995 through May 1998) of the Beth Israel Deaconess Medical Center were searched to identify cases of breast fine-needle aspiration biopsies that were highly cellular and composed of bland-appearing spindle/columnar cells and that could represent either epithelial or stromal cells; these cases were reported as indeterminate (atypical/suspicious) and had subsequent excisional biopsies taken. Results.—Four such cases were found. Two were fibroadenomas and 2 were papillary carcinomas. Their appearances were strikingly similar on aspiration cytology. All cases were prepared with the ThinPrep method. On microscopic examination, all 4 cases were hypercellular and had many single cells and clusters of columnar/elongate cells. Immunocytochemistry proved these cells to be of epithelial origin. At least occasional bipolar stromal cells were seen in the background. The only appreciable difference between the benign and malignant cases was more significant nuclear atypia, which was barely discernible, in the malignant cases. Immunocytochemistry for smooth muscle actin was helpful in 2 cases that had sufficient material. Conclusions.—Some cases of fibroadenomas and papillary carcinomas can be very difficult, if not impossible, to distinguish on fine-needle aspiration cytology. Immunocytochemistry may be helpful if sufficient material is available. To avoid false-negative or false-positive diagnosis on cytology, it is best to report such cases as atypical or suspicious with final diagnosis pending excisional biopsy.

Malignant Pericardial Mesothelioma. Report of two Cases, Review of the Literature and Differential Diagnosis

2005 ◽  
Vol 91 (3) ◽  
pp. 276-279 ◽  
Author(s):  
Maximilian Papi ◽  
Giovenzio Genestreti ◽  
Davide Tassinari ◽  
Paolo Lorenzini ◽  
Silvia Serra ◽  
...  
Keyword(s):  
Differential Diagnosis ◽  
Radical Surgery ◽  
Asbestos Exposure ◽  
Distant Metastases ◽  
Review Of The Literature ◽  
Primary Tumors ◽  
Cardiac Neoplasm ◽  
Fibrous Stroma ◽  
Pericardial Mesothelioma ◽  
History Of

Malignant pericardial mesothelioma is an uncommon variety of a primary malignant cardio-pericardial tumor and it is a highly lethal and fortunately rare cardiac neoplasm. The presentation of pericardial mesothelioma is aspecific and pathologically mesothelioma is not the most common among primary tumors of the pericardium. It is characterized by atypical solid growth of mesothelium with formation of atypical cavities surrounded by fibrous stroma. Antemortem diagnosis is difficult and distant metastases are extremely rare. Radical surgery can be used to treat localized mesothelioma. The treatment for advanced primary pericardial mesothelioma is usually palliative because the tumor is resistant to radiotherapy and chemotherapy. The prognosis is unfavorable. The median survival from the onset of symptoms is six months. In this paper we report two cases of patients with primary mesothelioma of the pericardium without a definite history of asbestos exposure.

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