Background: Intrapulmonary teratoma (IPT) is a rare type of extra gonadal teratoma. Due to the non-specific symptoms, it can be easily misdiagnosed as other diseases. The patient with IPT in our case was initially misdiagnosed with lung abscess, although he underwent bronchoscopy and percutaneous lung puncture biopsy.
Case presentation: We reported an intrapulmonary teratoma in a 42-year-old male, who has persistent cough, expectoration and hemoptysis symptoms. Chest computed tomography showed a cavitary mass in the left upper lobe with heterogeneous components. The patient was misdiagnosed with lung abscess at first, who underwent some invasive examinations and was administered different antibiotics in peripheral hospitals. The mass containing silky and nonpigmented hairs were found in the left upper lobe by bronchoscopy in our hospital. Considering the rare bronchoscopic appearance, surgical resection was recommended and postoperative histopathologic examination finally confirmed the diagnosis of IPT.
Conclusion: IPTs usually present non-specific symptoms and indistinguishable chest images, which can be easily misdiagnosed. The presences of fat and sebaceous material or masses of hair are highly specific and pathognomic signs for IPT. Accurate diagnosis and prompt treatmemt are of great significance for the prognosis of patients with IPT.