非典型肺结节的螺旋CT征象与病理对照分析

目的探讨螺旋CT在非典型肺结节诊断中的应用价值。方法回顾性分析72例经手术(41例)、穿刺活检(31例)证实的肺结节的CT图像和病理学资料。结果CT表现:浅分叶征(34/72)、形态不规则(50/72)、长毛刺征(10/72)、空气支气管征(2/72)、空泡征(2/72)。螺旋CT拟诊肺癌38例、肺结核瘤22例和肺炎性假瘤12例。病理证实:肺癌30例(其中腺癌16例、鳞癌8例、肺泡癌4例和类癌2例),肺结核30例和肺炎性假瘤12例。诊断符合率:肺癌20/30,肺结核瘤18/30和肺炎性假瘤2/12。72例中,CT诊断正确40例,误诊32例,误诊率44.4%。10例肺癌误诊为肺结核瘤4例(长毛刺、形态不规则)、炎性假瘤6例(形态不规则、长毛刺或空气支气管征);12例肺结核瘤误诊为肺癌8例(浅分叶征)、炎性假瘤4例(浅分叶征);10例炎性假瘤误诊为肺癌(浅分叶征)。结论螺旋CT对非典型肺结节定性诊断较局限,常需穿刺活检确诊。但其对非典型的肺内结节具有很好的定位、密度分辨和形态描述。

Comparative analysis between spiral CT and pathology of pulmonary nodules

Objective To explore the value of spiral CT in the diagnosis of atypical pulmonary nodules. Methods CT,clinic and histopathologic data of 72 patients with atypical pulmonary nodules confirmed by surgical resection in 41 cases and /or biopsy in 31 cases were retrospectively analyzed. Results CT scans demonstrated slight lobulation in 34 cases,irregular margin in 50 cases,long speculate in 10 cases,air-bronchogram in 2 case,vacuole in 2 case. 38 pulmonary cancer,22 pulmonary tuberculosis and 12 pulmonary inflammatory pseudotumors were diagnosed with spiral CT. However,30 pulmonary cancer,30 pulmonary tuberculosis and 12 pulmonary inflammatory pseudotumors were confirmed by histopathology. The overall accurate diagnostic rate of pulmonary cancer was 66.7% (20/30),pulmonary tuberculosis was 60%(18/30),pulmonary inflammatory pseudotumors was 16.7%(2/12). 40 cases were diagnosed correctly and 32 cases were misdiagnosed with CT in 72 cases of atypical pulmonary nodules. The misdiagnostic rate of CT was 44.4%. 10 cases of lung cancer were misdiagnosed,including 4 cases of tuberculosis (long speculate or irregular margin) and 6 cases of inflammatory pseudotumors (irregular margin or long speculate or air-bronchogram). 12 cases of tuberculosis were misdiagnosed,including 8 cases lung cancer (slight lobulation) and 4 cases of inflammatory pseudotumors (slight lobulation). 10 cases inflammatory pseudotumor were misdiagnosed as lung cancer (slight lobulation). Conclusion Spiral CT was very useful in the localization and morphological describing,but difficult in qualitative diagnosing of atypical pulmonary nodules,exactly diagnosis was relied on surgery and biopsy.