Therapeutic conisation is indicated in: September 2009
Therapeutic conisation is a procedure used in gynecology. I remember that it's primarily for treating cervical intraepithelial neoplasia (CIN), especially high-grade lesions like CIN 2 or 3. It's also used when there's a suspicion of invasive cancer but not enough to warrant a hysterectomy. So the correct answer would likely be related to CIN or early cervical cancer.
Now, for the options. Let's think of possible distractors. Common wrong options might include conditions like endometriosis, fibroids, or even low-grade CIN. For example:
A. Cervical polyps
B. Endometriosis
C. Cervical intraepithelial neoplasia grade 3 (CIN III)
D. Uterine fibroids
In this case, the correct answer is C. CIN III.
To explain, the core concept is the treatment of high-grade cervical lesions. Therapeutic conisation removes the abnormal tissue and serves both diagnostic and therapeutic purposes. The correct answer is CIN III because it's a high-grade lesion that requires intervention. The other options like cervical polyps or fibroids are managed differently, often with excision or myomectomy. Endometriosis is treated with hormonal therapy or excision, not conisation.
Clinical pearls: Remember that conisation is for high-grade CIN (CIN II/III) and suspected invasive cancer. It's important to differentiate from diagnostic conisation, which is for biopsy purposes. Also, the procedure can affect future cervical function, so it's crucial to use it appropriately.
**Core Concept**
Therapeutic conisation is a gynecological procedure used to treat high-grade cervical intraepithelial neoplasia (CIN II/III) and early-stage cervical cancer. It involves excising a cone-shaped portion of the cervix to remove dysplastic or malignant tissue while preserving fertility in select cases.
**Why the Correct Answer is Right**
The correct answer is **Cervical intraepithelial neoplasia grade III (CIN III)**. Therapeutic conisation is indicated for CIN III, which represents severe dysplasia or carcinoma in situ. This procedure provides both diagnostic histopathology and therapeutic excision, preventing progression to invasive cervical cancer. It is preferred over less effective alternatives like cryotherapy for high-grade lesions.
**Why Each Wrong Option is Incorrect**
**Option A: Cervical polyps** β These are benign hyperplastic lesions managed by simple excision, not conisation.
**Option B: Endometriosis** β Pelvic endometriosis is treated with hormonal therapy or excisional surgery, not cervical conisation.
**Option D: Uterine fibroids** β Fibroids are managed with myomectomy, hysterectomy, or medical therapy, not conisation.
**Clinical Pearl / High-Yield Fact**
Therapeutic conisation is contraindicated in pregnancy due