Diagnosis of pulmonary adenoid cystic carcinoma using multimodal ultrasound imaging technology: A case report.

RATIONALE: Pulmonary adenoid cystic carcinoma (PACC) is an exceedingly uncommon malignant tumor originating from salivary glands.

PATIENT CONCERNS: We present a case of primary PACC with multiple lung metastases in a 48-year-old male patient.

DIAGNOSIS: Diagnosis involved grayscale ultrasound, shear wave elastography, contrast-enhanced ultrasound, and ultrasound-guided percutaneous lung biopsy, all conducted in a one-stop manner, and confirmed by pathological examination.

INTERVENTIONS: Treatment was recommended after the diagnosis was confirmed, but was not accepted.

OUTCOMES: With telephone follow-up, the patient survived.

LESSONS: PACC is an exceedingly uncommon malignant tumor originating from salivary glands. Compared to other cases, this case highlights the potential of multimodal ultrasound imaging for diagnosing lung tumors.