Vercelli-Retta J, Almeida E, Ardao G, Paseyro A M, Pedreira G, Morelli R, Balboa O
Section of Surgical Pathology, Hospital Italiano, Montevideo, Uruguay.
Diagn Cytopathol. 1997 Oct;17(4):295-7. doi: 10.1002/(sici)1097-0339(199710)17:4<295::aid-dc11>3.0.co;2-j.
Two cases of an unusual finding of capsular pseudoinvasion in follicular thyroid adenomas after fine-needle aspiration (FNA) procedures are reported. These capsular breaches were noted along the hemorrhagic needle track, which traversed the normal peripheral thyroid parenchyma into the lesions. A reparative reaction was seen at some points along one of the tracks. Histologic examination also showed extrusion of the tumor parenchyma through the capsular interruption in one case. Surgical pathologists should be aware of this rare complication of FNA of thyroid follicular adenomas as a differential diagnosis of minimally invasive (encapsulated) follicular carcinoma.
本文报告了两例在细针穿刺（FNA）术后滤泡性甲状腺腺瘤中出现包膜假浸润这一罕见发现的病例。这些包膜破裂沿着出血的针道被发现，针道穿过正常的甲状腺外周实质进入病变。在其中一条针道的某些部位可见修复反应。组织学检查还显示，在一例病例中肿瘤实质通过包膜中断处挤出。手术病理学家应注意甲状腺滤泡性腺瘤FNA的这种罕见并发症，将其作为微小浸润性（包膜内）滤泡癌的鉴别诊断。
