EPITHELIAL (CUTANEOUS) CYSTS
EPIDERMAL INCLUSION CYSTS=SEBACEOUS CYSTS=EPIDERMOID CYST=EPIDERMAL CYST
ESSENTIALLY ALL SKIN CYSTS—-ECTODERMAL IN ORIGIN
WITHIN THE SKIN(DERMIS)
MONOGERMINAL
EXCLUSIVELY ECTODERM
NO ASSOC. WITH SKIN APPENDAGES
MOVE WITH THE SKIN ON PE
CHARACTERISTIC DIMPLE OR PIT
FILLED WITH SEBUM AND KERATIN DEBRIS, LINED WITH SIMPLE SQUAMOUS EP
Rx:OBSERVATION OR EXCISION
PILAR OR TRICHILEMMAL CYST
STRATOCYSTOMA MULTIPLEX
TERATOMAS
NEOPLASMS OF PLEURIPOTENT EMBRYONAL CELLS
1/4,000
5-10% IN THE H & N—PRIMARILY THE NP OR NECK NEAR THE THYROID—IN THE MIDLINE
FEMALE > MALE
USUALLY Dx PRIOR TO AGE 1
18% ASSOC WITH POLYHYDRAMIOS
RARELY MALIGNANT IN CHILDREN
USUALLY INVOLVE ALL THREE GERM CELL LAYERS
APPEAR CYSTIC, SOLID, OF MULTILOCULATED
4 TYPES
DERMOID CYST—REALLY A BENIGN FORM OF MATURE TERATOMA
DYSONTOGENIC=DEFECTIVE EMBRYOGENESIS
TERM USED LOOSELY FOR OVARIAN NEOPLASMS
IS SEQUESTERED ECTO AND MESODERM—LINED WITH ADNEXAL CELLS
LOCATED IN THE S.Q.—BENEATH THE DERMIS—CAN BE ATTACHED TO THE UNDERSURFACE OF THE DERMIS
SKIN MOVES OVER THEM ON PE
PRIMARILY IN THE MIDLINE(TISSUE FUSION PLANES) OR IN THE LATERAL ORBIT OR THE SUBMENTAL REGION—–DO NOT CONFUSE WITH TGDC OR RANNULA—DOES NOT MOVE WITH TONGUE EXTRUSION OR DEGLUTTITION
30% IN THE H & N
MAY COMMUNICATE WITH DURAL ECTODERM IN THE NOSE
Rx: EXCISION—TAKE THE CAPSULE
TERATOID CYST
—CROSSES THE DISTINCTION FROM CYST(MALFORMATION) TO NEOPLASM—-
TERATOMA—–USUALLY SOLID, ALL 3 GERM LAYERS
HAIRY POLYP
EPIGNATHUS “ON THE JAW”–WELL DIFF EXOPHYTIC MASS OF THE OC OR PHARYNX—OFTEN FATAL DUE TO AIRWAY PROBLEMS