In approximately one third of DMs, there is no identifiable in situ elanoma, and histopathologic recognition of the malignant dermal spindle cells may be challenging. DMs associated with an in situ melanoma in the epidermis and/or follicular epithelium are easier to recognize histopathologically.
Cervical cerclage may be done when a woman has: 1  An incompetent cervix. 2  Had a miscarriage because of an abnormally shaped uterus or damage to the cervix. A damaged cervix may not remain closed during pregnancy.  Had a previous second-trimester pregnancy loss or a delivery that occurred with few or no contractions.
A cervix (the structure at the bottom of the uterus) that is incompetent is abnormally weak, and therefore it can gradually widen during pregnancy.