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CASE REPORT
Year : 2018  |  Volume : 8  |  Issue : 2  |  Page : 136-139

Clear-cell squamous cell carcinoma: An uncommon variant of very common malignancy in the head and neck


Department of Pathology, Dr. B. Borooah Cancer Institute (Regional Institute for Treatment and Research), Guwahati, Assam, India

Correspondence Address:
Lopa Mudra Kakoti
Department of Pathology, Dr. B. Borooah Cancer Institute (Regional Institute for Treatment and Research), Gopinath Nagar, Guwahati - 781 016, Assam
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijohs.ijohs_23_18

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Clear-cell squamous cell carcinoma (SCC) is an extremely rare and incompletely understood entity. Clear-cell change occurs due to cytoplasmic accumulation of glycogen, water, intermediate filaments, immature zymogen granules, or a paucity of cellular organelles. Clear-cell change can be seen in any of the neoplasms, but as pure form variant, it is difficult to find in head-and-neck SCC. The World Health Organization has recognized clear-cell SCC as separate entity at other few sites such as penis but not in the head-and-neck SCC, and these are known to aggressive variant. We, hereby, present a case of clear-cell variant of squamous carcinoma in lower gingivobuccal mucosa in a 59-year-old male patient. Histopathology showed sheets of clear cell separated by fibrous septa and foci showing squamous cells with malignant features. Periodic acid–Schiff and immunohistochemistry (IHC) were done to rule out differentials of clear-cell variants of different sites such as salivary gland, odontogenic origin, and cutaneous adnexal origin. To establish the prevalence, biological nature, significance, and clinical course of clear-cell SCC in the head-and-neck region, more number of case reports are expected to be published in future. We concluded by emphasizing on the need of further analysis of all clear-cell tumors in the head and neck with histochemistry and IHC investigations to arrive at the proper diagnosis.


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