Issue 7

1.1. Introduction: Chlorine is a yellow-green gas at room temperature. It is an extremely reactive element and a strong oxidizing agent. It has intermediate water solubility and it can cause acute damage to upper and lower respiratory tract. It can be detected easily because of its strong odor (1,2). Common cause of chlorine gas poisoning these days are accidental industrial exposure. Toxicity of chlorine depends upon the dose and duration of exposure.

Carcinosarcoma of the parotid gland is a rare and aggressive malignant mixed tumor in which carcinomatous and sarcomatous elements coexist and metastasize together. The tumor may occur in patients with previous or coexisting pleomorphic adenoma or may arise de novo of the parotid gland.

Septic arthritis of symphysis pubis is a rare disease, also known as osteomyelitis of pubic symphysis. It represents less than one percent of all the cases of osteomyelitis. The symptoms are deceiving and can mimic many conditions.

1.1. Aims The identification of tumor-specific DNA methylation patterns in epithelial colorectal cells in feces has emerged as a novel and noninvasive screening method for colorectal cancer (CRC) and precancerous lesions. Our study investigates a new panel of DNA methylation biomarkers with high sensitivity and specificity for the early screening of CRC and advanced adenomas in a Chinese population.

1.1. Background: The COVID-19 epidemic has adversely affected health systems globally, with some on the verge of collapse, as countries experienced the second wave of the pandemic.