(a) (i) Enlist conditions having an increased risk of malignant disease in bone and cartilage. (ii) Briefly mention…

(a)(i) Conditions that increase the risk of malignant disease in bone and cartilage include Paget’s disease of bone, in which sarcomatous change, usually osteosarcoma, may occur; multiple hereditary osteochondromas, which can transform into chondrosarcoma; enchondromas, especially in Ollier disease and Maffucci syndrome, with risk of chondrosarcoma; fibrous dysplasia, which may undergo malignant change to fibrosarcoma or osteosarcoma; prior radiation exposure to bone; and chronic osteomyelitis, particularly with long-standing draining sinuses. The risk is higher in long-standing and multiple lesions.

(a)(ii) The WHO 2020 classification of bone tumours is based on tissue of origin and differentiation. It includes cartilage-forming tumours, osteogenic tumours, fibrogenic tumours, fibrohistiocytic tumours, undifferentiated small round cell sarcomas such as Ewing sarcoma, haematopoietic tumours, giant cell tumour, notochordal tumours, vascular tumours, myogenic tumours, lipogenic tumours, epithelial tumours, and tumours of uncertain differentiation. This classification guides histopathological reporting and treatment planning.

(b) After subtotal gastrectomy for carcinoma stomach, complications are best described in two time phases. Early complications, usually within 30 days, are predominantly mechanical or functional and require prompt recognition because they influence mortality. Duodenal stump leak or blow-out is a serious early complication, especially after Billroth II reconstruction, and may cause peritonitis and sepsis. Gastric atony produces delayed emptying, nausea, vomiting and distension. Dumping syndrome may appear once oral feeding starts, with early vasomotor symptoms and, later, hypoglycaemic features. Afferent loop obstruction causes bilious vomiting and postprandial pain, while efferent loop obstruction causes postprandial vomiting of food. Late complications develop over months to years and often present with anaemia, weight loss, reflux symptoms or malabsorption. Gastric remnant carcinoma is a recognised long-term risk, particularly after many years. Bile reflux gastritis causes epigastric pain, nausea and haematemesis. Nutritional complications include iron, vitamin B12 and folate deficiency, malabsorption, and osteoporosis due to reduced calcium and vitamin D absorption.

(c)(i) In a 25-year-old infertile woman with menorrhagia and multiple uterine fibroids, the aim is to confirm the cause of bleeding, map the fibroids, and preserve fertility. Evaluation should include a detailed menstrual and fertility history, pelvic examination, and targeted imaging. Ultrasound has already shown multiple fibroids; MRI pelvis is useful for mapping number, size and location, especially intramural or subserosal lesions. Hysteroscopy assesses the endometrial cavity and identifies submucous fibroids. Endometrial biopsy is important to exclude hyperplasia or malignancy, although risk is low at this age. Management should be fertility-sparing. Hysteroscopic resection is suitable for submucous fibroids causing menorrhagia. For intramural or subserosal fibroids, myomectomy, laparoscopic or open according to size and number, is the main fertility-preserving option. The small size of the largest fibroid makes hysteroscopic or laparoscopic approach feasible if location is suitable. GnRH agonists may be given before surgery to reduce fibroid size and correct anaemia. Uterine artery embolisation can be considered in selected cases, but its effect on future fertility requires careful counselling.

(c)(ii) The recent FIGO classification of abnormal uterine bleeding, introduced in 2011, uses the mnemonic PALM-COEIN. It separates structural from non-structural causes and directs investigation. Structural causes are polyp, adenomyosis, leiomyoma, and malignancy or hyperplasia. Non-structural causes are coagulopathy, ovulatory dysfunction, endometrial causes, iatrogenic causes, and not yet classified. The endometrial pattern helps distinguish aetiology. A secretory pattern indicates ovulation. A proliferative pattern suggests anovulatory or ovulatory dysfunction, where unopposed oestrogen maintains a pre-secretory endometrium. A hyperplastic pattern suggests unopposed oestrogen stimulation and may be seen in ovulatory dysfunction or endometrial pathology. An atrophic pattern suggests hypoestrogenic states, iatrogenic effects, or perimenopausal change.

(d)(i) For a young newly married couple, contraceptive counselling should be individualised according to desired duration of fertility spacing, health, and preference. Combined oral contraceptives are suitable for many women; they are highly effective when taken correctly, reversible, and may regulate cycles, but they do not protect against sexually transmitted infections. Barrier methods, including male and female condoms, diaphragm, cervical cap and spermicides, are reversible and user-dependent; condoms provide STI protection, whereas diaphragm and other barriers do not reliably prevent STIs. The levonorgestrel intrauterine device is a long-acting reversible option with high efficacy and quick return to fertility, but it also does not protect against STIs. Natural family planning may be used by couples with regular cycles and willingness to abstain during fertile periods, but it has lower efficacy and requires careful education. Counselling should also cover side effects, contraindications, and the need for follow-up.

(d)(ii) Female sterilisation methods include laparoscopic tubal ligation, in which the tubes are occluded by bipolar coagulation, Falope ring or Filshie clip; postpartum mini-laparotomy, commonly using Pomeroy’s technique; and hysteroscopic sterilisation with Essure, which has been withdrawn from use. Informed consent and surgical safety are essential. Complications of tubectomy include bleeding, infection, bowel or urinary tract injury, failed sterilisation, ectopic pregnancy if conception occurs after failure, and post-tubal ligation syndrome, a controversial condition of persistent pelvic pain or menstrual disturbance attributed to the procedure.

(e)(i) The yellow category of biomedical waste, in the context of this question, includes human anatomical waste, animal waste, soiled waste, expired or discarded medicines, and chemical waste. It should be segregated in yellow non-chlorinated bags or containers, with appropriate labelling and secondary containment where needed. Segregation at source prevents cross-contamination. Treatment and disposal options are incineration, plasma pyrolysis, or deep burial, the latter being restricted to anatomical waste in rural areas where permitted. Autoclaving or microwaving followed by shredding is not the appropriate route for yellow-category waste; that method belongs to red-category management.

(e)(ii) Incineration is a thermal treatment method with both advantages and limitations. Its advantages are reliable pathogen destruction, substantial volume reduction, and the possibility of waste-to-energy recovery. However, it can generate dioxins and furans if combustion temperature, residence time and flue-gas treatment are inadequate, and it may release mercury and other toxic emissions. It also has high capital and operational costs, requires skilled maintenance, and produces ash that needs safe disposal. Therefore, incineration should be used only with emission controls meeting WHO and EPA standards, and with monitoring by CPCB or State Pollution Control Boards under the Biomedical Waste Management Rules, 2016. In India, incinerators must be sited and operated according to CPCB norms.