Bullae are rounded or irregularly shaped blisters containing serous or seropurulent fluid.They differ from vesicles only in size, being larger than 1 cm.
A noncontagious inflammation of the skin, characterized chiefly by redness, itching, and the outbreak of lesions that may discharge serous matter and become encrusted and scaly.
On the other hand, neoplastic cysts include endometriomas, serous and mucinous cystadenomas, and mature cystic teratomas, as well as malignant ovarian tumors.
Benign serous tumors are called serous cystadenomas, and are the most common type, and often develop on both ovaries, and typically affect premenopausal women.
Finally, the last category of neoplastic cysts include malignant ovarian tumours, like serous or mucinous cystadenocarcinomas, which develop from surface ovarian epithelium, just like their benign counterparts.
The high levels of urea irritate the serous pericardium, making it secrete a thick pericardial fluid that's full of fibrin strands and white blood cells.