Subglottotracheal Adenoid Cystic Carcinoma in a 16-Year-Old Female-A Case Report

Clinical Characteristics, Treatment and Prognosis of Primary Tracheal Adenoid Cystic Carcinoma: A Multicenter Retrospective Study

BACKGROUND

Tracheal adenoid cystic carcinoma (TACC) is a rare salivary gland malignant tumor. Previous studies mainly focused on surgery, radiation, and chemotherapy. The purpose of this study is to describe more clinical characteristics, treatments, and overall survival (OS) of TACC.

METHODS

Retrospectively analyzed TACC patients from two medical institutions and the SEER database from January 2010 to December 2021. Survival curves were drawn using the Kaplan-Meier method, and the effects of prognosis were analyzed by multivariate COX regression and AFT. The endpoint of the study was overall survival (OS).

RESULTS

One hundred fifty TACC patients were enrolled (DZM 11, EG 64, SEER 75), and the 5- and 10-year survival rate was 70.62% and 35.80%, with a median survival time of 98 months. Lymph node status (yes) is an independent risk factor for TACC (HR = 3.020, 95% CI = 1.419-6.426, p = 0.004), and surgery is an independent protective factor (HR = 0.293, 95% CI = 0.146-0.587, p = 0.001). The AFT yielded similar results. In subgroup analysis of 63 non-surgical patients, lymph node status (Yes) (HR = 3.511, 95% CI = 1.498-8.229, p = 0.004), and tumor longitudinal diameter range (TLDR) > 1 (HR = 2.975, 95% CI = 1.360-6.506, p = 0.006) are independent risk factors, while Targeted Therapy (HR = 0.248, 95% CI = 0.096-0.637, p = 0.004) is an independent protective factor.

CONCLUSION

Lymph node status and TLDR are prognostic factors of TACC. Surgery is associated with prolonged survival of TACC. Targeted therapy may be associated with improved survival among non-surgical TACC patients.

TRIAL REGISTRATION

ChiCTR2400083551.

Pulmonary Adenoid Cystic Carcinoma Mimicking Asthma-Like Symptoms: A Case Report and Literature Review

Introduction

Pulmonary adenoid cystic carcinoma (PACC) is a rare, low-grade malignant salivary gland-type tumor characterized by a dormant onset and slow progression, often leading to misdiagnosis. Due to its rarity, limited cases have been reported in the literature. This report aimed to enhance clinicians' understanding of this infrequent disease.

Case Presentation

We present the case of a 41-year-old female patient diagnosed with PACC. Our report provides a comprehensive analysis of the patient's imaging, pathology, and treatment, with a particular focus on immunohistochemical results. Importantly, we emphasize the significance of considering foreign bodies and tumors in the bronchus when encountering asthma-like symptoms unresponsive to conventional treatments. Due to the uncertain etiology and pathophysiology of PACC, there are currently no established guidelines for chemotherapy and radiotherapy.

Conclusion

PACC predominantly manifests as bronchial lesions without significant clinical heterogeneity. Therefore, it is crucial to consider foreign bodies and tumors in the bronchus when dealing with asthma-like symptoms, especially in patients without chronic lung disease who do not respond to anti-infective, antispasmodic, and antiasthmatic treatments. Additionally, meticulous examination of lesions is essential for timely diagnosis and intervention, ultimately improving patient survival rates.