In patients the thymus is typically enlarged, and contains many germinal centres with T and B cell areas very similar to those seen in lymph nodes. The tumour in thymoma associated disease is typically epithelial in nature.[6] Facioscapulohumeral muscular dystrophy – even though there is not a clear correlation between the facioscapulohumeral muscular dystrophy and the pharyngeal and upper aesophageal striated muscle. Minor, and nonspecific, primary aesophageal dysmotility was present as seen in the 2008 study by Joerg-patrick Stübgen.[7] Multiple sclerosis – may lead to aesophageal dysmotility [8][9]