cysts Flashcards
Baker’s cyst
-herniation of the synovial membrane through weak posterior surface of the fibrous capsule.
-usually secondary to osteoarthiritis.
-it occurs in the midline
ttt: cause
Chronic Bursitis types /ttt
- Prepatellar bursitis (housemaid’s knee)
-Infrapatellar bursitis (clergyman’s knee)
-Olecranon bursitis (student’s elbow)
- Semimembranosus bursitis
Semimembranosus bursitis
- on the medial side of the popliteal fossa on children >
hallux valgus (Bunion).
over the medial aspect of the head of the first metatarsal bone
it is (Adventitious)bursa is acquired and no anatomical bursa was present at the site of the newly formed cyst.
most coomon type of Ganglion
Simple ganglion is more common and is commonly found on the dorsum of the wrist and the foot. It is treated by excision, but it occasionally resolves spontaneously. Recurrence rate is high
true cyct meaning and examples
The wall of a true cyst is lined by epithelium or endothelium
dermoid cyst :
congenital :: sequestration cyst or tubuloepidermoid cyst ( branchial cyst - thyroglossal cyst - Post-anal dermoid (from the neurenteric canal).)
aquired:: implantation cyst - inclusion cyst
Retention cysts examples
sebaceous cyst
parotid cyst
Clinical features of a cyst:
- Cysts containing clear fluid are brilliantly translucent
- The swelling is fluctuant, however, a tense cyst feels solid.
- Cysts usually present as a swelling that has a smooth surface and spherical appearance.
- They are usually painless however cysts may be painful when infection or haemorrhage causes sudden increase in intracystic tension.
- Bedside aspiration can reveal the nature of the
- Depending on its site, a cyst may have specific signs and symptoms. For example, the common bile duct may be obstructed by a choledochal cyst,
a hydatid cyst may cause pain by stretching the capsule of the liver .
and an ovarian cyst may compress pelvic veins and the patient presents with varicose veins.
site of sebaceous cyst
- Sebaceous cyst can occur anywhere in the body except in the palms and soles because
they do not contain sebaceous glands. face scalp , scrotum >
Complications of sebaceous cyst
- Sebaceous horn:
2- infection : Cock’s peculiar tumour. - Infection
ttt of sebaceous cyst
- Excision by an elliptical incision that should include the punctum.
- Infected cysts are treated by antibiotics and hot fomentations.
If it forms an abscess, it
should be drained and delayed excision is done after resolution of infection
Sequestration dermoid sites
a- Midline of the body, especially in the neck. (sublingual and submental dermoid) صورة البنت
b- Inner and outer angles of the orbital margin (internal or external
angular dermoid). صورة العملى الحاجب
c- Root of the nose.
d- Behind the ear (post auricular dermoid). ورا الأذن
cause of sequestration
is due to subcutaneous sequestration of part of the surface epithelium during embryonic
skin fusion.
along lines of skin fusion ( midline)
