| 1451 | 遠位胆管部腫瘤 | 黒田直人先生 | （高知赤十字） | |
| Intraductal papillary neoplasm of the bile duct | 20 |
| with low-grade dysplasia | 1 |
| * with high-grade | |
| 乳頭状構築がやや乱れており，Ki-67の染まり具合 -> high-grade | |
| with moderate atypia | 1 |
| with low-grade intraepithelial neoplasia, intestinal type | 1 |
| with low- or intermediate- intraepithelial neoplasia | 1 |
| with high-grade intraepithelial neoplasia | 1 |
| with intestinal type | 1 |
| Cholangiocarcinoma | 1 |
| Tubular adenoma | 3 |
| # | Intraductal tubular neoplasia (Dr.能登原) | 1 |
| Intraductal tubulopapillary neoplasia (ITPN) | 1 |
| |
| 1452 | 頭部皮膚腫瘍 | 物部泰昌先生 | （川崎医大医療センター） | |
| Angiosarcoma | 11 |
| cutaneous | 1 |
| epithelioid | 2 |
| * with aberrant expression of neuroendocrine marker | |
| 皮膚血管肉腫で神経内分泌マーカーが染まることがある（'differentiation'とは言わず，'expression'と表現する） | |
| Epithelioid hemangioendothelioma | 2 |
| Merkel cell carcinoma | 4 |
| and Kaposi sarcoma | 1 |
| Neuroendocrine carcinoma | 2 |
| metastatic | 1 |
| Small cell eccrine adenocarcinoma | 1 |
| Sweat gland adenocarcinoma | 1 |
| Sebaceoma | 1 |
| Malignant melanoma | 1 |
| Superficial ES/PNET | 1 |
| Sarcoma | 1 |
| Diffuse large B-cell lymphoma | 1 |
| |
| 1453 | 前縦隔腫瘍 | 松野芽衣先生 | （川崎医科大学） | |
| Mediastinal seminoma | 17 |
| * with thymic cyst | |
| associated with multilocular thymic cyst | 1 |
| in mature cystic teratoma | 1 |
| small seminoma in the wall with mature cystic teratoma | 1 |
| # 奇形腫の有無について => PAX8を | |
| Germinoma | 2 |
| Germ cell tumor | 1 |
| Primary mediastinal large B-cell lymphoma | 2 |
| Hodgkin lymphoma | 3 |
| nodular sclerosis | 1 |
| Branchial cleft cyst | 1 |
| |
| 1454 | 皮膚腫瘍 | 古城裕加里先生 | （川崎医科大学） | |
| Malignant proliferating trichilemmal tumor | 11 |
| * (WHO:) Proliferating trichilemmal cyst carcinoma | |
| 線維生間質内への微小胞巣の広がり -> 浸潤
病巣の大部分が浸潤では？ | |
| Squamous cell carcinoma arising in proliferating trichilemmal tumor | 1 |
| Proliferating trichilemmal tumor | 3 |
| Malignant pilomatricoma | 1 |
| Pilomatricoma with irregular nests of squamous epithelium | 1 |
| Trichilammal carcinoma | 3 |
| Malignant pilar tumor | 1 |
| Squamous cell carcinoma | 6 |
| Verrucous carcinoma | 1 |
| |
| 1455 | 顎下腺腫瘍 | 松野岳志先生 | （川崎医科大学） | |
| Small cell eccrine carcinoma | 7 |
| small cell neuroendocrine carcinoma | 1 |
| with salivary duct carcinoma | 3 |
| * mixed small cell neuroendocrine and salivary duct carcinoma | 1 |
| Neuroendocrine carcinoma | 1 |
| Salivary duct carcinoma | 2 |
| with neuroendocrine differentiation | 1 |
| with neuroendocrine carcinoma | 1 |
| Mucoepidermoid carcinoma | 6 |
| high-grade | 1 |
| high-grade and neuroendocrine carcinoma | 1 |
| and myoepithelial carcinoma | 1 |
| # | Carcinoma ex pleomorphic adenoma | 8 |
| 多形腺腫が背景にあると仮定すれば，様々な分化を示すmalignancyが出やすいので，NECの存在を説明しやすい | |
| Malignant mixed tumor | 1 |
| Malignant transformation of pleomorphic adenoma | 1 |
| Salivary duct carcinoma | 1 |
| Salivary duct ca. & large cell neuroendocrine ca | 1 |
| Mucoepidermoid ca & small cell ca | 1 |
| Small cell ca. & salivary duct ca. | 1 |
| Myoepithelial carcinoma | 1 |
| Adenocarcinoma, NOS | 1 |
| Undifferetiated carcinoma | 1 |