A 35-year-old male is found dead in his apartment after 3 days. The body shows early decomposition with skin discoloration, bloating, and putrefaction odour. On examination, the examiner notes that livor mortis is still partially blanching in some areas, and rigor mortis is absent. All of the following post-mortem changes are consistent with this timeline EXCEPT:
A. Greenish discoloration of the lower right abdomen (Tache noire) due to bacterial proliferation and sulphaemoglobin formation
B. Partial blanching of livor mortis indicating that fixation is incomplete and the body was moved within the first 8–12 hours post-mortem
C. Skin slippage and hair loss due to separation of the epidermis from the dermis
D. Absence of rigor mortis because it has completely resolved after 24–48 hours in ambient temperature
Explanation
Post-mortem Changes at 72 Hours: Clinical Interpretation
Timeline Context
At 3 days (72 hours) post-mortem under ambient conditions (20–25°C), the body is in the early decomposition phase. The stem describes skin discoloration, bloating, putrefaction odour, absent rigor mortis, and partially blanching livor mortis.
Analysis of Each Option
Table
Change
Timeline
Mechanism
Interpretation
Skin slippage & hair loss
24–72 hrs
Epidermal–dermal separation by bacterial enzymes and putrefactive gases
Consistent with 3-day timeline
"Tache noire" = greenish abdomen
24–72 hrs
Sulphaemoglobin formation from bacterial H₂S + haemoglobin
INCORRECT TERM — see below
Rigor mortis absence
Resolves 24–48 hrs
Muscle protein breakdown by autolysis and bacterial enzymes
Consistent — rigor should be gone by day 3
Partial blanching livor mortis
Fixation begins 6–8 hrs, complete 8–12 hrs
Incomplete fixation or environmental delay
Consistent with atypical/delayed fixation
Why Option B (Index 1) Is the EXCEPT Answer
Key Point
"Tache noire" is a specific forensic term referring to a dark brownish-black desiccation band that forms on the exposed sclera (white of the eye) when the eyelids are partially open after death. It is caused by drying and desiccation of the conjunctiva, NOT by bacterial proliferation or sulphaemoglobin formation.
High-YieldNEET PG
Tache noire = scleral desiccation band on exposed conjunctiva; appears within hours of death in open-eyed bodies
Greenish discoloration of the lower right abdomen = early putrefaction sign due to sulphaemoglobin formation (H₂S from Clostridium spp. + haemoglobin); begins over the caecum (right iliac fossa) because of high bacterial load in the large intestine
These are two entirely different post-mortem changes with different mechanisms, timelines, and anatomical locations
Option B incorrectly labels the greenish abdominal discoloration as "Tache noire," making it the EXCEPT answer — the description is of putrefactive greenish discoloration, but the term applied is wrong and inconsistent with forensic definitions
Clinical Pearl
In forensic examinations, precise terminology is critical. Tache noire (French: "black spot") is exclusively used for the scleral desiccation band. The greenish abdominal discoloration of putrefaction is simply called "putrefactive greenish discoloration" or "early putrefaction sign." (Reddy's Essentials of Forensic Medicine, 34e, Ch. 4; Parikh's Textbook of Medical Jurisprudence, 7e, Ch. 3)
Why the Other Options Are Consistent
Option A (Skin slippage & hair loss): Correct — occurs at 24–72 hours due to bacterial enzyme action and putrefactive gas accumulation separating epidermis from dermis.
Option C (Rigor mortis absence): Correct — rigor mortis resolves by 24–48 hours under ambient conditions; its absence at 72 hours is expected and consistent.
Option D (Partial blanching livor mortis): Consistent — partial blanching at 72 hours, while atypical, can occur with delayed fixation due to environmental factors (cold, moisture); the statement that fixation is incomplete is forensically acceptable in this context.
Reddy 34e Ch 4; Parikh 7e Ch 3; Modi's Medical Jurisprudence & Toxicology, 24e
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