Editing Lymphedema (section)

====Grades====
Lymphedema can also be categorized by its severity (usually compared to a healthy extremity):<ref>{{cite journal | vauthors = Lee TS, Morris CM, Czerniec SA, Mangion AJ | title = Does Lymphedema Severity Affect Quality of Life? Simple Question. Challenging Answers | journal = Lymphatic Research and Biology | volume = 16 | issue = 1 | pages = 85–91 | date = February 2018 | pmid = 28453410 | doi = 10.1089/lrb.2016.0049}}</ref>
* '''Grade 1''' (mild edema): Involves the distal parts such as a forearm and hand or a lower leg and foot. The difference in circumference is less than {{Convert|4|cm|abbr=on}} and no other tissue changes are present.
* '''Grade 2''' (moderate edema): Involves an entire limb or corresponding quadrant of the trunk. Difference in circumference is {{Convert|4|-|6|cm|abbr=on}}. Tissue changes, such as pitting, are apparent. The patient may experience [[erysipelas]].
* '''Grade 3a''' (severe edema): Lymphedema is present in one limb and its associated trunk quadrant. Circumferential difference is greater than {{Convert|6|cm|abbr=on}}. Significant skin alterations, such as [[Keratin#Cornification|cornification]], [[keratosis]], [[cysts]] or [[fistulae]], are present. Additionally, the patient may experience repeated attacks of [[erysipelas]].
* '''Grade 3b''' (massive edema): The same symptoms as grade 3a, except that two or more extremities are affected.
* '''Grade 4''' (gigantic edema): In this stage of lymphedema, the affected extremities are huge, due to almost complete blockage of the lymph channels.