25. Teeth. Number, character, condition, anomalies, dental work, caries, Hutchinson’s teeth, odontoma, dental osteoma, dentigerous cysts, epulis, papilloma, etc.
26. Mucous Membranes. Color, deposits or incrustations, eruptions, erosions, herpes, mucous patches, rhagades, ulcers, fissures, moisture, trauma, effects of corrosives, burns, pigmentation, as in Addison’s disease, leukoplakia, hairy tongue, hemorrhages, tumors, etc.
27. Muscles. Musculature and condition of muscles (slight, athletic, well developed, poor, flabby, soft, etc.), anomalies, etc.
28. Rigor Mortis. Postmortem rigidity is one of the absolute signs of death. It begins usually 1-2 hours after death, the involuntary muscles and heart showing it first. Externally it shows first in the muscles of lower jaw and neck, extends downward, involving the lower extremities last and disappearing in the same order. Its appearance, however, is subject to the greatest variation, and the presence or absence of rigor mortis cannot be used as a criterion for the estimation of the length of time the body has been dead. Instantaneous rigor has been reported in suicides and in people killed in battle. Intense excitement, great muscular exertion, etc., favor its rapid appearance. It also comes on very quickly after death from rabies, tetanus, strychnine poisoning, cholera and a number of other conditions. It sometimes is delayed or absent after heat-stroke; chronic alcoholism also delays its appearance. Usually the contraction lasts 24-48 hours, but under certain conditions may persist for several days. It is prolonged in muscular individuals, after death by suffocation, rabies, strychnine poisoning, etc. The stiffening of the muscles may be broken by application of heat or the use of force (removal of clothes from the body); when once broken it rarely returns. In a case of death from rabies seen by the writer the rigor was so strong that it required the united efforts of two men to straighten the limbs, and before the close of the autopsy the rigor had returned as strong as in the beginning. Rigidity due to undertaker’s injections and freezing must not be mistaken for rigor mortis. The possibility of rigidity due to ankylosis must also be borne in mind.
29. Panniculus. The subcutaneous panniculus is estimated by pinching up a fold of skin between the thumb and fingers of the right hand and the thickness determined. The amount is described as panniculus abundant, moderate, absent, etc. Estimates should be made of panniculus of upper extremities, thorax, abdomen, back and lower extremities. Pathologic conditions, such as general obesity, adiposis dolorosa, multiple lipomata, elephantiasis lipomatosa, fatty collar, etc., should be described in full.
30. Oedema. At the same time that the panniculus is being examined, the presence or absence of œdema (pitting on pressure) should be noted in the same regions. When present it may be described as slight, moderate, marked, extreme, localized, universal, etc. Emphysema of the subcutaneous tissue is shown by the presence of elastic swellings of the skin, not pitting on pressure, but giving a crepitation when palpated.
31. Body Heat. The absence or presence of the body heat is of great importance in giving some idea as to the relative length of time the body has been dead. The nose, ears and extremities first become cool, the liver region retaining the heat longest. The rate of cooling depends upon the external temperature and the conditions of the body. Nude bodies, cadavers exposed to water and cold, and bodies that have suffered severe hemorrhages lose their heat more rapidly. Under ordinary conditions the rectal temperature is the same as that of the surroundings in about forty hours. During the formation of the rigor there may be a slight increase in the temperature of the cadaver. An increase above the normal temperature has also been noted in the dead body immediately after death from tetanus, cholera, small-pox, peritonitis, electric currents, suffocation, gangrene, etc.
32. Hypostasis. After death the blood passes into the veins and very soon through gravity collects in the greatly distended veins of the lowest portions of the body, except where these are pressed upon by the weight of the body. Such a settling of the blood begins usually within 1-2 hours after death, but may take place even before death (hypostatic congestion) in cases of long-standing recumbent position, cardiac lesions with failure of compensation, wasting diseases, acute infections, death from suffocation, etc. Postmortem lividity should be described as to its extent, location and color. In anæmia the color is pale purplish red, in congestion dark purple, in cyanosis the color may be dark bluish red and the fingers, toes, ears, etc., retain the cyanotic appearance for some hours after death; in potassium-chlorate poisoning the color is chocolate, in hydrogen-sulphide poisoning grayish green, in poisoning with hydrocyanic acid or carbon monoxide it is rose or cherry red. Fresh hypostatic patches can be made pale by pressure and when cut they will bleed freely. Hemorrhages cannot be pressed out nor will hemorrhagic areas bleed as freely as hypostatic patches. In all medicolegal cases care should be taken to differentiate bruises and ecchymoses from hypostatic patches, as in the popular mind the latter are often regarded as evidences of trauma or violence. The location of the hypostasis is of importance in showing the position of the body after death; if the anterior portion of the body is hypostatic the cadaver must have been lying upon its face for some time after death; suspension of the body for some time after death by hanging causes a hypostasis of the lower extremities. Of the internal organs the brain, lungs, stomach and coils of intestine chiefly show hypostasis. Antemortem hypostasis of the lungs is distinguished from postmortem by its deeper color, firmer consistence, more marked œdema and microscopic signs of beginning inflammation (hypostatic pneumonia). Cadaveric lividity reaches its maximum in 24-48 hours, and after this time diffusion gradually occurs. In connection with the examination of hypostatic areas the condition of the superficial vessels as to size, distention, etc., should always be noted.
33. Putrefaction. The first signs of putrefaction are seen in the transformation of the hypostatic areas into diffusion spots and stripes following the course of the larger veins. The color is at first a dirty red or brownish-red, but soon becomes gray or green as a result of the action of hydrogen sulphide diffusing from the intestines. Diffusion spots cannot be made pale by pressure, nor do they bleed when cut. The greenish coloration begins first over the abdomen and lower intercostal spaces, and this gradually spreads over the body, showing first in the hypostatic areas and along the veins. The abdomen then becomes distended; gas may form in the subcutaneous tissues so that the skin becomes swollen, crackles on pressure and gives off gas-bubbles when cut. The epidermis becomes loosened in spots, forming blebs containing a dirty-brown exudate, while the tissues become soft and are easily torn. The odor of putrefaction is evident. Decomposition sets in more quickly in infants, in fat and plethoric individuals, and after death from snake-bite, active syphilis, plague, sepsis, heat-stroke, suffocation, acute infectious fevers, icterus, gangrene, diabetes, etc.; it is delayed by hydrocyanic acid and other poisons. When putrefactive bacteria are present in the body, decomposition may begin immediately after death.
34. Orifices of the Body. The mouth, nose, ears, anus, urethra and vagina are to be examined with special regard to their condition and contents (open, closed, gaping, torn, bleeding, discharge of pus, blood, mucus, féces, stomach contents, semen, urine, foreign substances, parasites, ear-wax, etc.). In cases of suspected rape an especial examination of the orifice of the vagina or anus is indicated.