Application of α-smooth muscle actin and c-kit in the differential diagnosis of adenoid cystic carcinoma from polymorphous low-grade adenocarcinoma

Abstract Pancreatic mucinous cystic neoplasm (MCN) harbors two histological components, tumor epithelia and ovarian-like stroma (OLS). To examine the tumorigenesis of pancreatic MCNs, this study analyzed the distribution, amount, immunohistochemical phenotype, presence of theca cells of the OLS, and the alteration of tumor epithelium of 29 surgically resected MCN cases and compared them with tumor sizes. Non-mucinous type epithelium was present in all low-grade MCNs but its ratio decreased with tumor size (p < 0.05), suggesting that epithelial mucinous changes are a progression phenomenon. The intralobular distribution of OLS was observed in 27.6 % of MCN cases and its existence related to a smaller size (p< 0.05), suggesting intralobular generation of MCNs. Nuclear expression of β-catenin was observed for OLS of everywhere, suggesting consistent activation of the Wnt pathway for OLS. Three MCN cases (10.3%) contained a-smooth muscle actin (SMA)-negative OLS, where OLS surrounding dilated pancreatic ducts or MCN cysts were a-SMA-positive and otherwise negative, suggesting that a-SMA-positivity is an acquired phenomenon of OLS. With this study, we could hypothesize that pancreatic MCNs may generate intralobularly. Epithelial mucinous change and a-SMA-positivity of OLS may be progression phenomena. This is the first study to show the intralobular distribution of OLS.

Download Full-text

Dendritic Interstitial and Myofibroblastic Cells at the Border of Salivary Gland Tumors

Archives of Pathology & Laboratory Medicine ◽

10.5858/2001-125-0232-diamca ◽

2001 ◽

Vol 125 (2) ◽

pp. 232-236

Author(s):

Lori Soma ◽

Virginia A. LiVolsi ◽

Zubair W. Baloch

Keyword(s):

Smooth Muscle ◽

Salivary Gland ◽

Malignant Tumors ◽

Smooth Muscle Actin ◽

Staining Intensity ◽

Interstitial Cells ◽

Salivary Gland Tumors ◽

Benign Tumors ◽

Low Grade ◽

Muscle Actin

Abstract Objective.—CD34-positive dendritic interstitial cells may be associated with the regulation of tumor growth. This association has been studied in various human neoplasms, especially skin tumors. In this study, we evaluated the distribution of dendritic interstitial cells and myofibroblastic cells at the tumor periphery of various benign and malignant salivary gland neoplasms. Methods.—Forty-nine cases of salivary gland tumors were selected: 16 pleomorphic adenomas, 12 Warthin tumors, 8 polymorphous low-grade tumors, 5 adenoid cystic carcinomas, 6 acinic cell carcinomas, and 2 mucoepidermoid carcinomas. Immunohistochemical analysis was performed by using antibodies for CD34 (dendritic cells) and α-smooth muscle actin (myofibroblast) on formalin-fixed, paraffin-embedded archival tissue. Staining intensity was graded as marked (3+), moderate (2+), weak (1+), and absent (0). Results.—Staining intensity for CD34 was 3+ in 24 (86%) of 28 benign tumors (pleomorphic adenomas and Warthin tumors) and 6 (29%) of 21 malignant tumors (polymorphous low-grade tumors, acinic cell carcinomas, adenoid cystic carcinomas, and mucoepidermoid carcinomas) and 2+ in 4 (19%) of 21 malignant tumors. None of the benign tumors displayed 2+ staining with CD34. Three (11%) of 28 benign and 11 (52%) of 21 of malignant tumors failed to stain with CD34. α-Smooth muscle actin staining was 3+ in 10 (36%) of 28 benign tumors and 6 (29%) of 21 malignant tumors, and 2+ in 11 (39%) of 28 benign and 2 (9%) of 21 malignant tumors. Five (18%) of 28 benign and 11 (52%) of 21 malignant tumors failed to stain with α-smooth muscle actin. Conclusion.—We conclude that the dendritic interstitial cells and myofibroblastic cells may be associated with the regulation of tumor growth in salivary gland tumors.

Download Full-text

The role of immunohistochemistry for smooth-muscle actin, p63, CD10 and cytokeratin 14 in the differential diagnosis of papillary lesions of the breast

Journal of Clinical Pathology ◽

10.1136/jcp.2006.036830 ◽

2006 ◽

Vol 60 (3) ◽

pp. 315-320 ◽

Cited By ~ 38

Author(s):

G M K Tse ◽

P-H Tan ◽

P C W Lui ◽

C B Gilks ◽

C S P Poon ◽

...

Keyword(s):

Differential Diagnosis ◽

Smooth Muscle ◽

Smooth Muscle Actin ◽

Muscle Actin ◽

Papillary Lesions ◽

Cytokeratin 14

Download Full-text

Basaloid Squamous Cell Carcinoma of the Esophagus With or Without Adenoid Cystic Features

Archives of Pathology & Laboratory Medicine ◽

10.5858/2004-128-1124-bsccot ◽

2004 ◽

Vol 128 (10) ◽

pp. 1124-1130 ◽

Cited By ~ 2

Author(s):

Tie-Jun Li ◽

Yong-Xin Zhang ◽

Julie Wen ◽

Daniel F. Cowan ◽

John Hart ◽

...

Keyword(s):

Squamous Cell Carcinoma ◽

Smooth Muscle ◽

Cell Carcinoma ◽

Tumor Cells ◽

Squamous Cell ◽

Smooth Muscle Actin ◽

Basaloid Squamous Cell Carcinoma ◽

Muscle Actin ◽

Adenoid Cystic ◽

Basaloid Squamous

Abstract Context.—Basaloid squamous cell carcinoma (BSCC) of the esophagus is a rare malignant tumor that morphologically could bear some resemblance to adenoid cystic carcinoma (ACC) originating from salivary glands. Objective.—The purpose of this study is to describe the histologic, immunohistochemical, and ultrastructural findings of BSCCs of the esophagus, with an emphasis on comparing tumors with or without adenoid cystic features. Design.—We reviewed 239 cases of primary esophageal carcinoma and detected 12 cases (5%) of BSCC. The light and electron microscopic findings and immunocytochemical localization of various antigens, including cytokeratins (AE1, AE3), carcinoembryonic antigen, epithelial membrane antigen, S100, smooth muscle actin, and p53, were examined in these BSCC cases. Results.—Histologically, all BSCCs were composed of solid lobules or nests of basaloid cells with well-demarcated outlines surrounded by a fibrous stroma. Seven of 12 tumors showed areas of ACC-like features, that is, cribriform-like pseudoglandular lumina formation and hyaline material surrounding the tumor nests, whereas the remaining 5 tumors were apparently pure basaloid carcinomas. These 2 groups of tumors were histologically and immunohistochemically identical in many aspects, namely, high-grade nuclei of the tumor cells with frequent mitoses, abundant comedo-type necrosis, focal areas of concomitant squamous differentiation, consistent immunoreactivity for cytokeratins, and poor or absent staining for S100 and smooth muscle actin. Ultrastructurally, the basaloid tumor cells exhibited relatively undifferentiated cellular characteristics and undeveloped cell organelles. Conclusion.—Basaloid squamous cell carcinomas of the esophagus frequently have an intimate association with ACC-like patterns, but their histologic, immunocytochemical, and ultrastructural features correspond more to poorly differentiated squamous cell carcinoma than to salivary gland ACC. This distinction is important because genuine ACC is much less aggressive than BSCC.

Download Full-text

Cardiac microvascular endothelial cells express α-smooth muscle actin and show low NOS III activity

AJP Heart and Circulatory Physiology ◽

10.1152/ajpheart.1999.276.5.h1755 ◽

1999 ◽

Vol 276 (5) ◽

pp. H1755-H1768 ◽

Cited By ~ 14

Author(s):

Hiroshi Ando ◽

Thomas Kubin ◽

Wolfgang Schaper ◽

Jutta Schaper

Keyword(s):

Endothelial Cells ◽

Smooth Muscle ◽

Smooth Muscle Actin ◽

Low Density Lipoprotein ◽

Density Lipoprotein ◽

Microvascular Endothelial Cells ◽

Low Grade ◽

Muscle Actin ◽

Microvascular Endothelial

We established a culture system of porcine coronary microvascular endothelial cells (MVEC) with high cellular yield and purity >98%. Endothelial origin was confirmed by immunostaining, immunoblotting and fluorescence-activated cell sorter (FACS) analysis using low-density lipoprotein uptake, CD31, von Willebrand factor, and the lectin Dolichos biflorus agglutinin. MVEC were positive for α-smooth muscle actin in culture and in myocardium, as confirmed by FACS. Of the primary MVEC, ∼30% expressed nitric oxide synthase (NOS) III in numbers decreasing from the first passage (6 ± 1%) to the second passage (4 ± 1%; P < 0.001 vs. primary isolates), whereas ∼100% of aortic endothelial cells (AEC) expressed NOS III. In AEC, NOS III activity (pmol citrulline ⋅ mg protein−1 ⋅ min−1) was 80 ± 10 and was nearly abolished in the absence of calcium (5 ± 1, P < 0.001). In primary MVEC, however, NOS III activity in the presence and absence of calcium was 20 ± 4 and 25 ± 5, respectively. We conclude that cardiac MVEC, in contrast to AEC, contain α-smooth muscle actin, show low-grade NOS III activity, and provide a suitable in vitro system for the study of endothelial pathophysiology.

Download Full-text

Primary leiomyoma of the thyroid gland

The Journal of Laryngology & Otology ◽

10.1258/002221503770716322 ◽

2003 ◽

Vol 117 (10) ◽

pp. 832-834 ◽

Cited By ~ 12

Author(s):

Suna Erkiliç ◽

Ahmet Erkiliç ◽

Yildirim A. Bayazit

Keyword(s):

Differential Diagnosis ◽

Smooth Muscle ◽

Immunohistochemical Staining ◽

Smooth Muscle Actin ◽

Subtotal Thyroidectomy ◽

Muscle Actin ◽

Thyroid Lobe ◽

Surgical Specimen ◽

Spindle Cells ◽

The Right

Primary thyroid leiomyomas are rare, and only four cases have been reported to date. This is a report of an additional case of primary thyroid leiomyoma in a 40-year-old male who was admitted with a painless swelling in the right thyroid lobe and underwent subtotal thyroidectomy. The surgical specimen showed a well-circumscribed, greyish-white solid nodule. Histologically, the tumour was composed of spindle cells with blunt-ended nuclei that were arranged with short intersecting bundles.Immunohistochemical staining revealed reactivity with smooth muscle actin, vimentin and desmin. Histopathologic and immunohistochemical assessments produced the diagnosis of thyroid leiomyoma.Although primary thyroid leiomyoma is rare, it should be considered in the differential diagnosis of a cold thyroid nodule.

Download Full-text

IFITM1, CD10, SMA, and h-caldesmon as a helpful combination in differential diagnosis between endometrial stromal tumor and cellular leiomyoma

BMC Cancer ◽

10.1186/s12885-021-08781-w ◽

2021 ◽

Vol 21 (1) ◽

Author(s):

Weilin Zhao ◽

Mei Cui ◽

Ruiqi Zhang ◽

Xihua Shen ◽

Xin Xiong ◽

...

Keyword(s):

Differential Diagnosis ◽

Smooth Muscle ◽

Transmembrane Protein ◽

Smooth Muscle Actin ◽

Area Under The Curve ◽

Endometrial Stromal Sarcoma ◽

Tissue Microarrays ◽

Stromal Tumor ◽

Low Grade ◽

Endometrial Stromal Cells

Abstract Background The differential diagnosis of endometrial stromal tumor (EST) and uterine cellular leiomyoma (CL) remains a challenge in clinical practice, especially low grade endometrial stromal sarcoma (ESS) and CL, suggesting the need for novel immunomarkers panels for differential diagnosis. Interferon-induced transmembrane protein 1 (IFITM1) is a novel immunomarker for endometrial stromal cells, h-caldesmon is an immunomarker for smooth muscle cells and has a higher specificity than smooth muscle actin (SMA). So this study aimed to evaluate whether IFITM1, cluster of differentiation 10(CD10), SMA, and h-caldesmon are useful biomarker combinations for the differential diagnosis of EST and CL. Methods Tissue microarrays were used to detect IFITM1, CD10, SMA, and h-caldesmon immunohistochemical staining in 30 EST and 33 CL cases. Results The expressions of IFITM1 and CD10 were high in EST (86.7 and 63.3%, respectively) but low in CL (18.2 and 21.2%), whereas those of h-caldesmon and SMA were high in CL (87.9 and 100%) and low in EST (6.9 and 40%). In diagnosing EST, IFITM1 shows better sensitivity and specificity (86.7 and 81.8%, respectively) than CD10 (63.3 and 78.8%). The specificity of h-caldesmon in diagnosing CL was significantly higher (93.1%) than that of SMA (60%). When all four antibodies were combined for the differential diagnosis, the area-under-the-curve (AUC) predictive value was 0.995. The best combination for diagnosing EST was IFITM1 (+) or CD10 (+) and h-caldesmon (−) (sensitivity 86.7%, specificity 93.9%). Conclusion The best combination for diagnosing CL were h-caldesmon (+) and SMA (+) (sensitivity 87.9%, specificity 100%). IFITM1, CD10, SMA, and h-caldesmon are a good combination for the differential diagnosis of EST and CL.

Download Full-text

Stromal Tumors in the Prostate

Jurnal RSMH Palembang ◽

10.37275/jrp.v1i1.2 ◽

2020 ◽

Vol 1 (1) ◽

pp. 11-19

Author(s):

Aspitri Ani ◽

Kurniawan Dedy

Keyword(s):

Smooth Muscle ◽

Clinical Symptoms ◽

Urinary Tract Obstruction ◽

Smooth Muscle Actin ◽

Sarcomatoid Carcinoma ◽

Low Grade ◽

Muscle Actin ◽

Prostate Hyperplasia ◽

Stromal Tumors ◽

Lower Urinary Tract Obstruction

Stromal tumors of the prostate are rare mesenchymal tumors of the prostate stroma,in the form of spindle cell tumors, which are differentiated by cellularity, mitotic index,cellular atypia, and necrosis. These tumors are classified into two; prostatic stromaltumors of uncertain malignant potential (STUMP) and prostatic stromal sarcomas (PSS).The incidence is about 0.1-0.2% of the total incidence of prostate cancer. Thepathogenesis of prostate stromal tumors is based on origin, clonal and chromosomalabnormalities. Clinical symptoms of complaints lead to lower urinary tract obstruction,dysuria and pollakiuria as well as abnormalities in the rectal toucher (RT) examination.Macroscopically, brownish-white masses were found showing a solid or solid-cysticpattern. Radiological examination can use transrectal ultrasound (TRUS), CT Scan andMRI. Histopathologically, prostate STUMP has five different patterns, namely thedegenerative atypia pattern, hypercellular stroma pattern, phyllodes-type growthpattern, myxoid pattern, and epithelioid stromal pattern. Meanwhile, in PSS, there arehistological patterns of storiform, epithelioid, fibrosarcomatous, and patternless growthpatterns. Then PSS was subclassified into two, namely low grade and high gradetumors. Immunohistochemical examination showed immunoreactivity for CD34, PR,smooth muscle actin (SMA), desmin, HHF35, smooth muscle actin, vimentin andandrogen receptors and negative for estrogen receptors, CD117 and S-100. Thedifferential diagnosis is rhabdomyosarcoma, leiomyosarcoma, inflammatorymyofibroblastic tumor, sarcomatoid carcinoma, benign prostate hyperplasia, smoothmuscle tumor, gastrointestinal stromal tumor, and solitary fibrous tumor. Prognosis ofprostate STUMP is better than that of PSS. Treatment of STUMP is currently unknown.Definitive resection can be performed taking into account the patient's age, treatmentpreference, and the size or size of the lesion. Treatment for PSS radical prostatectomy,cystoprostatectomy, or pelvic exenteration for local aggressive tumors.

Download Full-text