Journals / Troia Tıp Dergisi / 2026 / Cilt: 7 Sayı: 3

Nasal polyp with bizarre stromal cells mimicking malignancy: a diagnostic pitfall

Belirgin bizar stromal hücreler içeren nazal polip: Maligniteyi taklit eden nadir bir tanısal tuzak

Murat Çelik(SELÇUK ÜNİVERSİTESİ)0000-0002-0798-1310
Pages
191–194
Publication Date
2026-09-30
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Recognition of this benign reactive process, particularly in limited specimens, is essential to avoid misdiagnosis as malignancy and prevent unnecessary aggressive treatment.

📌 3 Key Takeaways

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Objective & Hypothesis:Bizarre stromal cells in sinonasal polyps represent a rare reactive phenomenon that may closely mimic malignancy and lead to diagnostic pitfalls.
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Key Findings & Data:We report the case of an 18-year-old male presenting with progressive unilateral nasal obstruction and a history of prior endoscopic sinus surgeries.
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Conclusion & Impact:Recognition of this benign reactive process, particularly in limited specimens, is essential to avoid misdiagnosis as malignancy and prevent unnecessary aggressive treatment.
🔬Design:Olgu Sunumu
📍Scope:Comprehensive Sample
⚙️Variables:Nazal polip · Bizar stromal hücreler · Reaktif lezyon

Abstract

Bizarre stromal cells in sinonasal polyps represent a rare reactive phenomenon that may closely mimic malignancy and lead to diagnostic pitfalls. We report the case of an 18-year-old male presenting with progressive unilateral nasal obstruction and a history of prior endoscopic sinus surgeries. Imaging revealed a large polypoid lesion occupying the left maxillary sinus and extending into the nasopharynx. Histopathological examination demonstrated an edematous, inflamed stroma with prominent vascular proliferation and scattered markedly atypical stromal cells showing pleomorphic, hyperchromatic to vesicular nuclei, prominent nucleoli, multinucleation, and focal rhabdoid-like features. Mitotic figures were absent. Immunohistochemically, the atypical cells were positive for vimentin and desmin, with focal pancytokeratin expression and a low Ki-67 proliferation index. Complete excision was performed, and no recurrence was observed at 5 years. Recognition of this benign reactive process, particularly in limited specimens, is essential to avoid misdiagnosis as malignancy and prevent unnecessary aggressive treatment.

Özet

Sinonazal poliplerde görülen bizar stromal hücreler, maligniteyi yakından taklit edebilen ve tanısal yanılgılara yol açabilen nadir bir reaktif durumdur. Bu olgu sunumunda, ilerleyici tek taraflı burun tıkanıklığı ve daha önce endoskopik sinüs cerrahisi öyküsü bulunan 18 yaşındaki bir erkek hasta su-nulmaktadır. Görüntüleme incelemelerinde, sol maksiller sinüsü dolduran ve nazofarenkse uzanan büyük polipoid bir lezyon saptandı. Histopatolojik incelemede, belirgin vasküler proliferasyonun eşlik ettiği ödemli ve inflamatuvar bir stroma içerisinde; pleomorfik, hiperkromatikten veziküler görünüme değişen çekirdeklere, belirgin nükleollere, multinükleasyona ve fokal rabdoid benzeri özelliklere sahip, yaygın olmayan ancak belirgin derecede atipik stromal hücreler izlendi. Mitotik figür saptanmadı. İm-münohistokimyasal incelemede atipik hücreler vimentin ve desmin ile pozitif boyanırken, fokal pansi-tokeratin ekspresyonu gösterdi ve Ki-67 proliferasyon indeksi düşük bulundu. Lezyon tamamen eksize edildi ve 5 yıllık takip süresince nüks izlenmedi. Özellikle sınırlı biyopsi örneklerinde bu benign reak-tif sürecin tanınması, malignite ile yanlış tanıyı önlemek ve gereksiz agresif tedavilerin uygulanmasını engellemek açısından büyük önem taşımaktadır.

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Cite This Article

Çelik, M., Uğraş, S. (2026). Nasal polyp with bizarre stromal cells mimicking malignancy: a diagnostic pitfall. Troia Tıp Dergisi, Cilt: 7 Sayı: 3, 191–194. https://doi.org/10.55665/troiamedj.1985505

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