LAUSR

I read with interest the article entitled “Pseudoglandular schwannoma mimicking alveolar rhabdomyosarcoma: A diagnostic challenge on fine-needle cytology” by Yaprak Bayrak et al. I wish to make a correction about neck mass's radiological appearance definition in article. MRI is an imaging method based on the magnetization properties of atoms. A powerful, external magnetic field is deployed to align the protons that are normally randomly oriented within the water nuclei of the tissue being examined. This alignment is unsettled by introduction of an external radio frequency (RF) energy. The nuclei return to their resting alignment through various relaxation processes and in so doing emit RF energy. After a certain period following the initial RF, the emitted signals are measured. Variability in application of RF signal and measurement times results in MRI sequences. Most common MRI sequences and their usual imaging characteristic are summarized in Table 1. T1W (weighted) and T2W sequences are extremely useful in the diagnostic workup with soft tissue discrimination. In head and neck imaging, axial coronal and sagittal planes are frequently used for better orientation. When the images shown in the article were evaluated radiologically, it was seen that the image on the left (Figure 1A) was coronal T2 sequence with fat saturation obtained before the contrast. The image on the right (Figure 1B) was the post-contrast axial T1 sequence with fat saturation. Moreover, hypodense and hyperdense phrases written in the main text and figure legend are not a term used in MR examination. These misused terms belong to CT terminology. MRI shown in article revealed a hyperintense mass in coronal fatsaturated T2W (left) and hyperintense mass in post-contrast axial fatsaturated T1W (right) images. Since pre-contrast T1W series are not included in the images, we have no idea about contrast enhancement but we accepted that there is contrast enhancement with the information in the main text.