A 50-year-old woman is found dead in her home in Mumbai. The body is examined 36 hours after death. On external examination, the skin shows a purple-red discoloration over dependent areas of the body, which blanches on pressure. The abdomen shows a greenish discoloration starting from the right iliac fossa. Which of the following post-mortem changes is most consistent with the timeline and findings?

Explanation

## Post-Mortem Changes at 36 Hours The clinical presentation describes two distinct post-mortem phenomena: ### Livor Mortis (Hypostasis) - **Definition:** Gravitational pooling of blood in dependent areas after cardiac arrest and loss of vascular tone. - **Onset:** Begins 30 minutes to 2 hours after death; becomes fixed 8–12 hours post-mortem. - **Appearance:** Purple-red discoloration in dependent areas (buttocks, back, lower limbs when supine). - **Key Feature:** Blanches on pressure in early stages (<8 hours); becomes fixed and non-blanching after 12 hours. - **At 36 hours:** Fully developed and fixed; still visible as described. ### Early Putrefaction - **Onset:** Begins 24–48 hours post-mortem, depending on temperature, humidity, and body composition. - **Mechanism:** Bacterial decomposition of tissues, particularly in the caecum and right colon (high bacterial flora). - **Appearance:** Greenish discoloration starting from the right iliac fossa (McGregor's triangle), progressing to the abdomen. - **Timeline:** At 36 hours in warm climate (Mumbai), early putrefaction is expected. ### Why This Answer Fits At 36 hours post-mortem, livor mortis is fully established and fixed, while putrefaction is beginning—exactly matching the described findings. **Clinical Pearl:** The greenish discoloration starting from the right iliac fossa is pathognomonic for early putrefaction, as the caecum has the highest bacterial concentration.