scholarly journals Bilateral Nipple Enlargement as A Secondary Effect of Anabolic Drugs: A Histopathological Mimicker of Smooth Muscle Hamartoma

2021 ◽  
Vol 8 (2) ◽  
pp. 103-106
Author(s):  
Mar Llamas-Velasco ◽  
Maria Francesca Bianciardi Valassina ◽  
Enrique Ovejero-Merino ◽  
Guido Massi ◽  
Thomas Mentzel
Keyword(s):  
Smooth Muscle ◽  
Skin Biopsy ◽  
Smooth Muscle Actin ◽  
Clinical History ◽  
Clinical Suspicion ◽  
Secondary Effect ◽  
Muscle Actin ◽  
Drug Induced ◽  
Genital Area ◽  
Muscular Hamartoma

Smooth muscle hamartoma are usually solitary and congenital, may affect the genital area and nipples. Histopathologically, they are characterized by the presence of mature smooth muscle bundles. We present a 40 year-old male with bilateral nipple enlargement excised with clinical suspicion of bilateral leiomyoma. Skin biopsy shows mature, irregularly arranged smooth muscle bundles and lactiferous ducts between them. Immunohistochemistry is positive for smooth muscle actin, desmin and fumarase, but negative for estrogen and progestogen receptors. The presence of lactiferous ducts excludes bilateral leiomyomas. Even when, histopathologically, this can be interpreted as the nipple-type of muscular hamartoma of the breast, clinical history favors an anabolic drug-induced lesion. Bodybuilders present gynecomastia and nipple enlargement as frequent problems, but we have not found any histopathological description of these nipple lesions. We consider that dermatologists should be aware of the presence of them and dermatopathologists should know their histopathological features to avoid misdiagnosis as neoplasms.

scholarly journals Necrotizing Palisading Granuloma of the Bladder in an Otherwise Healthy Young Man

2012 ◽  
Vol 136 (6) ◽  
pp. 679-680 ◽  
Author(s):  
Maria Rosaria Raspollini ◽  
Alessandro Franchi ◽  
Augusto delle Rose ◽  
Bonnie Balzer ◽  
Jeffrey Brown ◽  
...  
Keyword(s):  
Smooth Muscle ◽  
Smooth Muscle Actin ◽  
Clinical History ◽  
Muscle Actin ◽  
Viable Cells ◽  
Smooth Muscle Tumors ◽  
History Of ◽  
Neoplastic Disorders ◽  
Mitotic Figures ◽  
Reactive Processes

We describe a case of a vesical mass in a young patient, histologically characterized by an intramural lesion composed of spindle and epithelioid histiocytes arranged in a palisaded pattern, with central necrosis similar to a rheumatoid nodule. There was no clinical history of autoimmunity or previous bladder procedures, infections, or trauma. However, the smooth muscle actin and desmin positivities seen in residual ghost cells within necrotic areas argued against a granulomatous process. Reactive processes, such as myofibroblastic proliferations, can overlap neoplastic disorders, including true smooth muscle tumors. We did not observe atypia in the viable cells and mitotic figures. These features did not support a diagnosis of malignancy. The fascicular pattern, spindle cell morphology, lack of marked cytologic atypia, and smooth muscle actin and desmin reactivities, with a lack of other lineage marker expression, all supported a diagnosis of an infarcted leiomyoma. The intramural location in the bladder also favored the diagnosis.

scholarly journals Cytotoxic Influence of Khat (Catha edulis (Vahl) Forssk. ex Endl) on Oral Fibroblasts, Squamous Carcinoma Cells, and Expression of α Smooth Muscle Actin

2021 ◽  
Vol 11 (8) ◽  
pp. 3524
Author(s):  
Azeem Ul Yaqin Syed ◽  
Muhammad A. Ahmed ◽  
Eman I. AlSagob ◽  
Mansour Al-Askar ◽  
Abdulrahman M. AlMubarak ◽  
...  
Keyword(s):  
Cell Death ◽  
Smooth Muscle ◽  
Smooth Muscle Actin ◽  
Control Cell ◽  
Squamous Carcinoma ◽  
Carcinoma Cells ◽  
Muscle Actin ◽  
Catha Edulis ◽  
Squamous Carcinoma Cells ◽  
Dose Dependent

The aim was to determine the cytotoxicity of Khat (Catha edulis (Vahl) Forssk. ex Endl) on normal oral fibroblasts (NOFs) and SCC4 (squamous carcinoma cells) along with expression of α-smooth muscle actin (α-SMA) in fibroblasts. Khat filtrate was prepared to obtain a concentrated viscous solution. NOFs and SCC4 cells were cultured in biological cabinets and were grown in Dulbeccos’ modified Eagles medium. Frozen cells were thawed at 37 °C and cell seeding was performed. NOFs and SCC4 cells were seeded on 96 well plates and allowed to attach. The medium was removed and a fresh medium containing different concentrations of Khat was added. The group without Khat served as a negative control and 4% paraformaldehyde as the positive control. Cell viability was assessed using the MTT assay and effect of Khat on fibroblast and SCC4 phenotypes was evaluated by immunostaining. Analysis of variance was used to assess data (p < 0.05). NOF 316 showed cell death in response to 4% paraformaldehyde, 12.5, 6.25, and 3.12 mg/mL of Khat. The highest concentration of Khat (25 mg/mL) failed to cause cytotoxicity of NOF 316. NOF 319 and NOF 26 displayed cell death at all concentrations of Khat, however, cytotoxicity was not dose dependent. NOF 18 and SCC4 cells showed dose-dependent cell death. NOF 316 showed α-SMA expression after 1 mg/mL of Khat exposure. Not all fibroblasts were α-SMA-positive, suggesting specific activation of a subset of fibroblasts. Khat is cytotoxic to NOF and SCC4 cells. Furthermore, it can also cause activation and phenotypic changes in oral fibroblasts, indicating a potential role in progression of oral squamous cell carcinoma.

Expression of alpha-smooth muscle actin, TGF-β1 and TGF-β type II receptor during connective tissue contraction

1997 ◽  
Vol 33 (8) ◽  
pp. 622-627 ◽  
Author(s):  
M. Reza Ghassemifar ◽  
Roy W. Tarnuzzer ◽  
Nasser Chegini ◽  
Erkki Tarpila ◽  
Gregory S. Schultz ◽  
...  
Keyword(s):  
Smooth Muscle ◽  
Connective Tissue ◽  
Smooth Muscle Actin ◽  
Type Ii ◽  
Muscle Actin ◽  
Alpha Smooth Muscle Actin ◽  
Tissue Contraction ◽  
Tgf Β1
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