Metastasis in the pineal region is a rare condition. To best of our knowledge, there is no case report of isolated pineal metastasis secondary to acute lymphocytic leukemia (ALL). The aim of this study is to show the pineal gland involvement of ALL in a case for the first time in the literature. A 25-year-old male patient diagnosed with ALL 2 years ago presented with headache and visual impairment. Brain magnetic resonance imaging (MRI) revealed a well-defined solid lesion which was revealed intensive enhancement after contrast. On diffusion-weighted images, the lesion showed significant diffusion restriction. Three months after therapy, control MRI demonstrated a completely resorbed pineal lesion. The pineal region may be a possible site of metastasis and involvement due to the absence of a blood-brain barrier, and should not be overlooked in patients with not only solid cancers but also ALL.

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OBJECTIVE:Various therapeutic methods are employed to reduce thyroid gland compression of the trachea. Differences in the amount of shrinkage in the thyroid gland, in the amount of amelioration of tracheal compression, and in the amount of fibrosis after treatment may occur with these different methods. Although the compression of the trachea decreases after thyroidectomy, the number of studies showing the extent of this is limited. The purpose of this study was to investigate the effect of thyroidectomy performed due to tracheal compression, to reveal the extent of improvement using magnetic resonance imaging (MRI), and to evaluate our results. METHODS:In total, 30 patients, i.e., 24 women and 6 men, with tracheal compression secondary to thyroid gland enlargement and undergoing total thyroidectomy were included in this study. MRI performed before surgery and 6 months after surgery. The amount of deviation from the tracheal midline and the tracheal lateral and anteroposterior (AP) diameters were measured, compared, and subjected to statistical analysis.RESULTS: Statistical analysis revealed significant differences between pre-and postoperative tracheal deviations, and lateral and AP diameters (p<0.001, p<0.001, and p=0.006, respectively). Histopathologically, benign or malignant pathology caused no significant difference in the postoperative improvement of tracheal anatomy (p=0.348 and p=0.148, respectively).CONCLUSIONS: Thyroidectomy performed due to tracheal compression provides significant improvement in tracheal anatomy. Due to its rapid and effective results, thyroidectomy should be one of the first options considered in the treatment of thyroid diseases with compression findings.