Schneiderman Prelims Vol-I. qxd

DEGENERATIVE DISEASES
Neurotrophic ulcers including those associated with
neuropathies – begins as fissured callosity on metatarsal heads
and heels 
Rook p.2775, 1998, Sixth Edition
EXOGENOUS AGENTS
Foreign body – hair – granuloma of heel
INFECTIONS
Blastomycosis-like pyoderma (pyoderma vegetans) – crusted or
verrucous plaques which may weep, ulcerate or clear centrally,
often involve the flexures, and do not respond to antibiotics
HYPERKERATOTIC LESIONS OF THE FEET
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alone despite the regular presence of 
Staphylococcus aureus
or group A streptococci 
JAAD 20:691–693, 1989
Candidal granuloma (CMCC) 
JAAD 21:1309–1310, 1989;
chronic mucocutaneous candidiasis 
Annu Rev Med
32:491–497, 1981
Chromoblastomycosis – feet, legs, arms, face, and
neck;common causative organisms include 
Phialophora
verrucosa, Fonsecaea pedrosoi, F. compactum, Wangiella
dermatitidus, Cladosporium carrionii and Aureobasidium
pullulans; diagnostic characteristic is the presence of large
pigmented round thick walled bodies with septation in two
planes (muriform cells) 
AD 133:1027–1032, 1997; BJD
96:454–458, 1977; AD 104:476–485, 1971
Erythrasma – disciform erythrasma; intertriginous and
perigenital;
Corynebacterium minutissimum; red to brown
irregularly shaped and sharply marginated scaly and slightly
creased patches of toe webs; coral-red fluorescence with
Wood’s light examination due to coproporphyrin; toe clefts are
most frequent location 
Rev Infect Dis 4:1220–1235, 1982
Herpes zoster in AIDS
Leprosy
Onychomycosis – thickened nails 
Rook p.2865, 1998,
Sixth Edition
Osteomyelitis – with 
painful neuropathic callus
Pinta – tertiary (late phase) – hyperkeratoses of forearms,
elbows, knees, ankles, legs, palms and soles 
Rook p.1274,
1998, Sixth Edition
Pitted keratolysis
Scabies, crusted (Norwegian scabies) 
Dermatology
197:306–308, 1998; AD 124:121–126, 1988
Syphilis, secondary; tertiary – tabes dorsalis – initial lesion is
clavus over weight-bearing regions of soles 
Arch Neurol
42:606–613, 1985
Tinea pedis – resembling crusted scabies 
Tyring p.346, 2002;
scutular favus-like tinea pedis – Microsporum gypseum
Tungiasis – verrucous plaque 
BJD 144:118–124, 2001
Warts
Yaws (mother yaw) – 
Treponema pallidum subsp. pertenue;
10–13
µ
m long by 0.15
µ
m wide; replicate in 30 hours;
non-venereal; transmitted by skin contact; primarily in children;
primary lesions on feet, legs, and buttocks; Africa, Asia, South
and Central America, and Pacific Islands 
JAAD 29:519–535,
1993; Cutis 38:303–305, 1986