At the outset of these bleedings the general health of the patient may appear unimpaired, and if they be few in number and moderate in extent but slight evidences of debility may be shown throughout the attack; but it is often the case that the loss of blood is excessive and long continued, and symptoms of profound anæmia supervene. The patient becomes greatly exhausted; intense pallor is developed, shortly followed by general oedema. Attacks of syncope appear, and in fatal cases—which are not common—death results from asthenia. This result may occur after a few days from the profuseness of the hemorrhage; usually, however, only after several weeks. Throughout the attack the cutaneous lesions continue to develop, either irregularly or in successive outbreaks, scattered over the general surface, involving the face less frequently than other parts. These spots undergo the color-changes peculiar to extravasated blood, and may be seen in all the stages of involution in the same patient. Fever, usually absent throughout the attack, may appear at the height of the affection, but does not run high. Local inflammations are exceedingly rare. In favorable cases recovery follows the gradual mitigation and disappearance of the symptoms, but relapses frequently occur, and convalescence may be retarded for months.
PURPURA RHEUMATICA (PELIOSIS RHEUMATICA).—Schoenlein in 1829 described as peliosis rheumatica an affection in which the symptoms of purpura simplex were associated with pain and often with effusion into the joints, especially those of the knee and ankle. He considered it as an independent malady. This opinion has been shared by Fuchs, Hebra, Kaposi, Neumann, and many others. Kaposi2 regards it as related to erythema nodosum, with which affection, indeed, it possesses some features in common. It probably, however, constitutes a complication of ordinary purpura. That it is not primarily rheumatic is shown by the almost invariable absence of many of the symptoms characteristic of rheumatism; that it cannot be an independent affection appears from its intimate relations with other forms of purpura.
2 Hautkrankheiten, 1880, p. 277.
Purpura rheumatica commonly begins with malaise, anorexia, debility, sometimes with mild fever. The patient is soon attacked with pains, of a more or less acute character, in the joints, especially the knees and ankles. There may be some effusion into the joint and cutaneous oedema. After a few days the nature of the complaint will be revealed by an eruption of petechiæ, first near the painful joints, but soon extending, involving in many cases even the head and trunk. The eruption may be at first slightly elevated and surrounded by a fine halo of hyperæmic injection.
The pains usually subside upon the appearance of the eruption, and the malady may be completed after a single outbreak. More commonly new joint-pains are experienced, fresh crops of petechiæ appear, and the trouble may be prolonged for weeks, even months, the patient meanwhile suffering not very greatly in general health. The lesions may be cutaneous only; rarely bleeding from mucous surfaces will occur (Scheby-Buch). Albuminuria may be present (Kaposi). An annual type is said by Kaposi, Neumann, and others to be sometimes observed, the spring and autumn being the usual seasons for the outbreaks. This is supposed to indicate a relationship with erythema nodosum and multiforme. Cardiac murmurs have been detected in the course of purpura rheumatica,3 but these were probably anæmic or antedated the purpuric symptoms. Purpura rheumatica never seems to result in endo- or pericarditis.
3 Kinnicutt, Archives of Dermatology, i. p. 193; Mollière, Ann. de Dermatol., v. p. 44.
SUB-VARIETIES.—Henoch4 and Couty5 have described a form of purpura mostly observed in children, in whom rheumatoid pains occur along with colic and vomiting of greenish or bilious matter, tenesmus, and sometimes with loss of blood from the bowels. The disease may be protracted throughout months by relapses. Cutaneous oedema frequently occurs. Couty regards it as a form whose peculiarities justify its assignment to a position of its own. The cause of the associated train of symptoms is supposed (Couty) to reside in the sympathetic system, and the name purpura nervosa is proposed for it. So many features of ordinary purpura are manifested in these cases that it seems better to consider them as examples of ordinary purpura complicated with gastro-intestinal derangement. It has been suggested that the nausea, vomiting, and abdominal pains may result from extravasation of blood into the peritoneal tissue.6
4 Berl. Klin. Wochenschr., 51, 1874.
5 Gaz. Hebd., 36 et seq., 1876.
6 Immermann, Ziemssen's Cyclopæd., vol. xvii. p. 265.