he
corium and even the subcutaneous tissue may share in the process.

#Do the cutaneous manifestations of the eruptive fevers bear resemblance
to the erythematous type of eczema?#

Scarlatina and erysipelas may, to a slight extent, but the presence or
absence of febrile and other constitutional symptoms will usually serve
to differentiate.

#What common skin diseases resemble some phases of eczema?#

Psoriasis, seborrh[oe]a, sycosis, scabies and ringworm.

#How would you exclude psoriasis in a suspected case of eczema (squamous
eczema)?#

Psoriasis occurs in variously-sized, rounded, _sharply-defined_ patches,
usually scattered irregularly over the general surface, with special
predilection for the elbows and knees. They are covered more or less
abundantly with whitish, silvery or mother-of-pearl colored imbricated
scales. The patches are always dry, and itching is, as a rule, slight,
or may be entirely absent. Eczema, on the contrary, is often localized,
appearing as one or more large, irregularly diffused patches; it merges
imperceptibly into the sound skin, and there is often a history of
characteristic serous or gummy oozing; the scaling is usually slight and
itching almost invariably a prominent symptom.

#How would you exclude seborrh[oe]a (eczema seborrhoicum) in a suspected
case of eczema?#

Seborrh[oe]a of the scalp is more commonly over the whole of that region
and is relatively free from inflammatory symptoms; the scales are of a
greasy character and the itching is usually slight or nil. On the other
hand, in eczema of this region the parts are rarely invaded in their
entirety; there may be at times the characteristic serous or gummy
oozing; inflammatory symptoms are usually well-marked, the scales are
dry and the itching is, as a rule, a prominent symptom. These same
differences serve to differentiate the diseases in other regions.

#How does scabies differ from eczema?#

Scabies differs from eczema in its peculiar distribution, the presence
of the burrows, the absence of any tendency to patch formation, and
usually by a clear history of contagion.

#How would you exclude ringworm in a suspected case of eczema?#

Ringworm is to be distinguished by its circular form, its fading in the
centre, and in doubtful cases by microscopic examination of the
scrapings.

#How does eczema differ from sycosis?#

Sycosis is limited to the hairy region of the face, is distinctly a
follicular i