Clinical, histopathological and immunohistochemical features of glomus tumor of the nail bed

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Abstract

Purpose: Glomus tumors account for 1–4% of benign hand tumors. In 65% of cases, it is located in the nail bed. Its rarity makes misdiagnosis problems relatively common. Symptomatology is characterized by the hallmark symptomatic triad. Imaging investigations may guide the diagnosis, but the diagnosis is made by pathological examination doubled by immunohistochemical (IHC) markers. Patients, Materials and Methods: We studied a group of seven female patients, aged 28 to 56 years. Clinical examination revealed the presence of the characteristic symptomatic triad. Ultrasound imaging tests were performed. Results: Anatomopathological examination made a diagnosis of glomus tumor in all seven cases. IHC staining showed that tumor cells were positive for alpha-smooth muscle actin (α-SMA) and h-caldesmon in all seven cases and negative for cluster of differentiation 34 (CD34) in 72.14%. IHC stainings for p63, S100, cytokeratin (CK) AE1/AE3 were negative in all cases. The clinical diagnosis completed by ultrasonography was histopathologically confirmed in all cases. Conclusions: Although the glomus tumor is a rare lesion, we need to be familiar with it because a diagnostic delay also implies a treatment delay which will lead to amplified suffering and even real disability due to the high-intensity pain in these cases.

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Perţea, M., Poroch, V., Velenciuc, N., Mitrea, M., Luncă, S., Terinte, C., … Veliceasa, B. (2021). Clinical, histopathological and immunohistochemical features of glomus tumor of the nail bed. Romanian Journal of Morphology and Embryology, 62(1), 233–238. https://doi.org/10.47162/RJME.62.1.23

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