RESUMEN
Intracranial epidermoid cyst is a rare pseudotumor of the nervous system, accounting for 0.2%-1.8% of all intracranial tumors. It is usually located in the cerebellopontine Angle or parasellar area, with insipid onset, slow growth and usually less than 2 cm in diameter. Giant epidermoid cysts that invade the bone have rarely been reported in the literature. Herein, we report a case of giant ECs extradural to the parietal bone, penetrating the skull and continuing to expand outward. In addition, a systematic search of four authoritative databases was conducted to collect the relevant reports of giant epidermoid cyst with diameter > 5cm for the first time, and to discuss the clinical and radiographic features of patients with giant epidermoid cyst and the influence of treatment options.
Asunto(s)
Neoplasias Encefálicas , Quiste Epidérmico , Humanos , Quiste Epidérmico/diagnóstico por imagen , Quiste Epidérmico/cirugía , Quiste Epidérmico/patología , Cráneo/diagnóstico por imagen , Cráneo/cirugía , Cabeza , Hueso Parietal/diagnóstico por imagen , Hueso Parietal/cirugía , Hueso Parietal/patologíaRESUMEN
RATIONALE: Pulmonary spindle cell carcinoma (PSCC) is a rare subset of pulmonary sarcomatoid carcinoma. PSCC is aggressive and has a poor prognosis. Pulmonary sclerosing pneumocytoma (PSP) is an asymptomatic slow-growing benign tumor, which usually occurs in middle-aged women. PATIENT CONCERNS: Herein, we report a case of solitary PSCC, occurring concomitantly with PSP in a 74-year-old woman. The patient visited our institution with productive purulent cough, dyspnea after activity, and hemoptysis. Enhanced computed tomography revealed an inhomogeneous enhanced mass with central low-attenuation in the right upper lobe (RUL). The mass located in the right lower lobe (RLL) exhibited homogeneous enhancement. DIAGNOSIS: These lesions were subsequently diagnosed as PSCC in the RUL and PSP in the RLL, following postoperative pathological examination. INTERVENTIONS: We performed lobectomy for the RUL and wedge resection for the RLL in one procedure. OUTCOMES: The patient did not experience complications after surgery. No radiological evidence of recurrence was observed on follow-up computed tomography performed within 7 months after the procedure. LESSONS: This case fully reflects the importance of the differential preoperative diagnosis of benign and malignant solitary pulmonary nodules. However, a rare and aggressive malignant tumor may have imaging features typical of a lung abscess, which should be treated carefully.