Cyst
A cyst is a closed sac, having a distinct membrane and division compared with the nearby tissue.
It is a cluster of cells that has grouped together to form a sac however an aspect of a cyst is that the cells forming the "shell" of such a sac are distinctly abnormal when compared with all surrounding cells for that given location.
It may contain air, fluids, or semi-solid material. A collection of pus is called an abscess, not a cyst. Once formed, sometimes 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.
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| Pathology: tumors (and related structures), cancer, and oncology (C00-D48) |
|---|
| Benign - Premalignant - Carcinoma in situ - Malignant |
| Topography |
| Anus - Bladder - Bone - Brain - Breast - Cervix - Colon/rectum - Duodenum - Endometrium - Esophagus - Eye - Gallbladder - Head/Neck - Heart - Hypopharynx - Liver - Larynx - Lung - Mouth - Pancreas - Penis - Prostate - Kidney - Ovaries - Salivary gland - Skin - Spinal - Stomach - Testicles - Thyroid - Urethra - Vagina - Vulva |
| Morphology |
| Papilloma/carcinoma - Cholangiocarcinoma - Choriocarcinoma - Adenoma/adenocarcinoma - Soft tissue sarcoma - Melanoma - Fibroma/fibrosarcoma - Metastasis - Lipoma/liposarcoma - Leiomyoma/leiomyosarcoma - Rhabdomyoma/rhabdomyosarcoma - Mesothelioma - Angioma/angiosarcoma - Osteoma/osteosarcoma - Chondroma/chondrosarcoma - Glioma - Lymphoma/leukemia |
| Treatment |
| Surgery - Chemotherapy - Radiation therapy - Immunotherapy - Experimental cancer treatment |
| Related structures |
| Cyst - Dysplasia - Hamartoma - Neoplasia - Nodule - Polyp - Pseudocyst |
| Misc |
| Tumor suppressor genes/oncogenes - Staging/grading - Carcinogenesis/metastasis - Carcinogen - Research - Paraneoplastic phenomenon - ICD-O - List of oncology-related terms |