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Hino R, Motoi N, Toda K, Ebina A, Yamada K, Higuchi M, Hirokawa M, Ishikawa Y. Stromal tiny black dots, like "sugar-coated", of von Kossa stain is a diagnostic clue to hyalinizing trabecular tumor of the thyroid gland. Pathol Int 2018; 68:176-182. [PMID: 29368414 DOI: 10.1111/pin.12638] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 12/13/2017] [Indexed: 12/21/2022]
Abstract
Hyalinizing trabecular tumor (HTT) is a rare low-grade tumor, and a prominent feature is the basement membranous stroma. We assume that such characteristic stromal findings of HTT are related to calcium deposition, and examined HTT samples by von Kossa special staining. There has been no report describing von Kossa special staining for such stroma. We collected 12 cases of HTT and 30 cases of papillary thyroid carcinoma (PTC) that had matched age, gender, tumor size, and surgical procedure characteristics as a control group. We compared the staining pattern and degree of von Kossa positivity between HTT and PTC, and a grading system of von Kossa stain was adopted to highlight differences between them. On von Kossa staining, all HTT revealed many tiny black dots around vessels in the hyalinized stroma, like "sugar-coated", and a high degree of calcium deposition in most cases, whereas PTC showed sparse stromal calcification in some cases. The degree of von Kossa staining was significantly different between the two groups. This is the first report describing abundant tiny black dots, like a "sugar-coated" appearance, of von Kossa stain in HTT. Here, we propose this finding can be a useful diagnostic clue to HTT.
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Affiliation(s)
- Rumi Hino
- Department of Pathology, The Cancer Institute, Japanese Foundation for Cancer Research (JFCR), 3-8-31 Ariake, Koto-ku, Tokyo, Japan.,Department of Sports and Health Science, Daito Bunka University, 560 Iwadono, Higashimathuyama-shi, Saitama, Japan
| | - Noriko Motoi
- Department of Pathology, The Cancer Institute, Japanese Foundation for Cancer Research (JFCR), 3-8-31 Ariake, Koto-ku, Tokyo, Japan.,Department of Pathology and Clinical Laboratories, National Cancer Center Hospital, Chuo-ku, Tokyo, Japan
| | - Kazutoshi Toda
- Division of Head and Neck, The Cancer Institute Hospital, JFCR, Tokyo, Japan
| | - Aya Ebina
- Division of Head and Neck, The Cancer Institute Hospital, JFCR, Tokyo, Japan
| | - Keiko Yamada
- Division of Ultrasonography Examination, The Cancer Institute Hospital, JFCR, Tokyo, Japan
| | - Miyoko Higuchi
- Department of Diagnostic Pathology and Cytology, Kuma Hospital, 8-2-35, Shimoyamate-dori, Chuo-ku, Kobe, Hyogo, Japan
| | - Mitsuyoshi Hirokawa
- Department of Diagnostic Pathology and Cytology, Kuma Hospital, 8-2-35, Shimoyamate-dori, Chuo-ku, Kobe, Hyogo, Japan
| | - Yuichi Ishikawa
- Department of Pathology, The Cancer Institute, Japanese Foundation for Cancer Research (JFCR), 3-8-31 Ariake, Koto-ku, Tokyo, Japan
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