Scab or Crust of abrasion appears brown Between 2-3 days

073. Scab or Crust of abrasion appears brown:

1. Between 12-24 hours

2. Between 2-3 days

3. Between 4-5 days

4. Between 5-7 days

Answer

2. Between 2-3 days

Reference

Parikh 6^th Edition Page 4.3

Apoorva Nandy 1^st Edition Page 213

Reddy 17^th Edition Page 138

Quality

Reader

Status

Repeat

QTDF

All Books

Discussion

From abrasions, the time of assault can be roughly assessed

Ä When fresh, an abrasion is red with evidence of oozing of serum and a little blood. There is no scab

Ä By 8 to 24 hours, there is a reddish scab formation

Ä By 2^nd and 3^rd day, the scab is reddish brown

Ä By 4^th and 5^th Day, it is dark brown

Ä By 6^th Day, it is blackish and it starts falling off from the margins. Epithelium grows underneath the scab

Ä After 7 Days, Scab dries, shrinks and falls off.

Ä By A big scab may take a few more days to fall off

Explanation

Self Explanatory

Comments

Except Apoorva Nandy, the other books do not talk about the 4^th and 5^th Day evolution of scab

Tips

Difference between antemortem and post mortem abrasion

Trait	Antemortem abrasion	Post mortem abrasion
Site	Anywhere on the body	Usually over bony prominences
Colour	Bright reddish brown	Yellowish, translucent and parchment like
Exudation	More; scab slightly raised	Less; Scab often lies slightly below the level of the skin
Microscopic feature	Intravital reaction and congestion seen	No intravital reaction and no congestion