सिस्ट (Cyst) बन्द थैलि हो। सिस्ट (cyst) मा हावा, तरल पदार्थ, वा अर्ध‑ठोस सामग्री हुन सक्छ। पुसको संग्रहलाई फोड़ा (abscess) भनिन्छ, जुन सिस्ट होइन। सिस्टलाई शल्यक्रिया गरेर हटाउन आवश्यक हुन सक्छ, तर यो यसको प्रकार र स्थानमा निर्भर गर्दछ।
A cyst is a closed sac, having a distinct envelope and division compared with the nearby tissue. Hence, it is a cluster of cells that has grouped together to form a sac (like the manner in which water molecules group together to form a bubble); however, the distinguishing aspect of a cyst is that the cells forming the "shell" of such a sac are distinctly abnormal (in both appearance and behaviour) when compared with all surrounding cells for that given location. A cyst may contain air, fluids, or semi-solid material. A collection of pus is called an abscess, not a cyst. Once formed, a cyst may resolve on its own. When a cyst fails to resolve, it may need to be removed surgically, but that would depend upon its type and location.
Ganglion cyst ― जोर्नीहरू बीच अचानक उत्पन्न हुने एसिम्प्टोमेटिक लम्पहरू। यदि ग्यान्ग्लियोन सिस्टको निदान पुष्टि भयो भने, सिस्ट भित्र फटाउन नोड्युललाई कडा थिचेर समस्या समाधान गर्न सकिन्छ।
Mucocele ― यो कुनै लक्षण बिना ओठमा नरम टक्करको रूपमा देखिन्छ।
