As the designated name, adenocarcinoma, not otherwise specific (ANOS) revealed lack of histomorphologic characteristics that could classify the tumors under specific name. ANOS had nothing in common with other salivary gland malignancies, but glandular differentiation. The purpose of this study is to find out the solid characteristics of ANOS on the base of cytological and architectural features. 20 ANOS cases were studied. We identified 20 patients with salivary adenocarcinoma, not otherwise specified, ranging in age from 26 to 76 years (median, 53.85 years), with slight female predilection (female 11: male 9). The minor salivary gland was the most common site of tumor origin, especially on the palatal area (11 out of 20). The size of tumor was from 1.0 to 7.0(median 3.07). For the histopathological analysis, we classified the tumors by cytological and architecture patterns. Basaloid and epitheloid cytological patterns were showed with solid, microcystic/pseudocystic architecture. We found invasive growth patterns in 7 out of 20 cases. Reviewing and classifying the common features of ANOS could be helpful to make a diagnosis of malignant salivary gland tumors.

Ⅰ. INTRODUCTION
 Ⅱ. MATERIALS AND METHODS
  1. 세포형태학적 분류기준:
  2. 구조적 패턴
 Ⅲ. RESULTS
  1. 임상병리학적 특징
  2. 조직병리학적 소견
 IV. DISCUSSION
 V. REFERENCES

• 김보경(서울대학교 치의학대학원 구강병리학 교실) | Bo-Kyoung Kim
• 강경림(서울대학교 치의학대학원 구강병리학 교실) | Kyung-Rim Kang
• 이재일(서울대학교 치의학대학원 구강병리학 교실) | Jae-Il Lee Corresponding author