Eponyms and Syndromes - O to R
Abbreviations: s. is syndrome, d. is disease
occipital horn syndrome | XLR form of cutis laxa |
oculocerebral-hypopigmentation syndrome | Cross-McKusick-Breen syndrome |
oculomandibulofacial syndrome | Francois syndrome, Hallermann-Streiff syndrome, mandibulo-oculofacial dyscephaly |
Ofuji’s disease | sterile annular pustules-face, trunk, extremities AKA eosinophilic folliculitis |
Ogna, EBS of | Norwegian cases of EBS |
Olmsted’s syndrome | massive, mutilating keratoderma with hyperkeratotic plaques & severe nail dystrophy with alopecia, follicular hyperkeratosis, oral leukokeratoses, psychomotor delay, short stature |
Omenn’s syndrome | AR; combined T & B cell immunodeficiency with alopecia, diffuse erythema, FTT, hyperkeratosis & recurrent infections |
Osler’s nodes | painful erythematous or hemorrhagic macules, papules or nodules on distal fingers; gonococcemia, hemolytic anemia, SLE, typhoid fever (see also Janeway lesion) |
Osler’s sign | small painful erythematous swellings (Osler’s nodes) in skin of hands & feet; subacute bacterial endocarditis (10%), SLE |
Osler’s toe | onychogryphosis AKA Hippocratic nail, ram’s horn nail |
Osler-Weber-Rendu syndrome | AD, 9q33; punctate telangiectasias of ears, feet, hands, lips, tongue; epistaxis, GI & GU telangiectasias GI hemorrhage, recurrent epistaxis in childhood, pulmonary & hepatic AV fistulas, CNS aneurysms, AV malformations AKA hereditary hemorrhagic telangiectasia |
osteogenesis imperfecta | see table at end of section |
Ostertag syndrome | AD; hereditary systemic amyloid, hepatomegaly, hypertension, nephropathy |
Ota, nevus of | unilateral, usually facial, slate-gray macules AKA nevus fuscocaeruleus opththalmomaxillaris |
pachydermoperiostosis | Touraine-Solente-Gole syndrome |
pachyonychia congenita | Jadassohn-Lewandowsky syndrome |
Pacinian corpuscles | receptors in deep dermis or subcutis especially in digits, associated with blood vessels, serving as rapidly adapting mechanoreceptors to vibrational stimuli |
PACK syndrome | primary biliary cirrhosis, anti-centromere antibody, CREST (calcinosis cutis, Raynaud’s phenomenon, esophageal dysfunction, sclerodactyly, telangiectasia) and keratoconjunctivitis sicca |
pagetoid reticulosis | Woringer-Kolopp disease |
painful bruising syndrome | women; purpuric painful ecchymoses with emotional stress, without preceding trauma |
Pallister-Killian syndrome | circumscribed hypopigmentation on cranium, sparse eyebrows & eyelashes, sparse scalp hair, severe MR, hearing loss, seizures, ptosis, high forehead, hypertelorism, facial defects |
Papillon-LefÀvre syndrome | AR; palmoplantar keratoderma with transgrediens, keratotic plaques of elbows, knees, periodontitis, tooth loss, falx calcification |
papular purpuric gloves & socks syndrome | Parvovirus B-19 in adults |
paraneoplastic acrokeratosis | Bazex’s syndrome |
parasitic melanoderma | vagabond’s disease |
Parkes-Weber syndrome | Klippel-Tr¾naunay-Weber syndrome |
Parrot’s lines | depressed linear scars radiating from anus, mouth, & nose like wheel spokes; congenital syphilis AKA rhagades |
Parry-Romberg syndrome | facial hemiatrophy, hyperpigmentation & atrophy of dermis, subcutaneous fat, muscle & bone |
Partingtons syndrome | FTT, hemiplegia, recurrent pneumonia, hyperpigmentation (generalized reticulate), seizures |
Pasini | dominant dystrophic epidermolysis bullosa albopapuloid |
Pastia’s lines | linear petechiae; Kawasaki disease, scarlet fever |
Paterson’s syndrome, Paterson-Brown Kelly syndrome, Paterson-Kelly syndrome | Plummer-Vinson syndrome |
peeling skin syndrome | AR; cycles of spontaneous desquamation of full thickness stratum corneum sheets, generalized hyperkeratosis, palmoplantar hyperkeratosis with pruritus, underlying erythroderma |
PEP syndrome | POEMS syndrome |
Peruvian wart | vascular papules & nodules developing in crops; Carrion’s d. AKA verruga peruana |
Peutz-Jeghers syndrome | AD; lentigines (around mouth, eyes, lips, oral mucosa, hands, feet), GI polyps, GI malignancies (3%), cancer (breast, pancreas, reproductive organs), colic, intussusception, GI bleeding |
Peyronie’s disease | induration of corpora cavernosa of penis, producing fibrous chordee |
phenylketonuria | AR; hyperphenylalaninemia due to phenylalanine 4-monooxygenase deficiency; eczema, hypopigmentation of hair & skin, MR, seizures, tumors, mousy odor |
PIBIDS | photosensitivity plus IBIDS (ichthyosis, brittle hair, intellectual impairment, decreased fertility, short stature) |
piebaldism | AD; c-kit on 4q12, depigmented patches, white forelock |
pigmented purpuric lichenoid dermatitis | Gougerot-Blum syndrome |
Pinkus corpuscle | see Haarscheibe receptor |
plasma cell balanitis (vulvitis) | Zoon’s balanitis (vulvitis) |
PLEVA | Mucha-Habermann disease |
Plummer-Vinson syndrome | angular chelitis, dysphagia, hypochromic anemia, koilonychia & painful tongue AKA Paterson’s syndrome, Paterson-Brown Kelly syndrome, Paterson-Kelly syndrome, sideropenic dysphagia, Vinson’s syndrome |
POEMS syndrome | polyneuropathy, organomegaly, endocrinopathy, M protein & skin changes AKA Crow-Fukase syndrome |
Pohl-Pinkus marks | hair shaft constrictions, acquired trichodystrophy; antimitotic drugs, emotional stress, systemic disease |
poikiloderma congenitale | Rothmund-Thompson syndrome |
polycystic ovary syndrome | Stein-Leventhal syndrome |
popliteal web syndrome | congenital popliteal webs, cleft palate, pits (lower lip), toenail dysplasia |
porphyria cutanea tarda | AD, 1p34, uroporphyrinogen decarboxylase gene, & sporadic/acquired; delayed photosensitivity, facial hypertrichosis, scarring alopecia, milia, hypermelanosis |
porphyria, acute intermittent | AD 11q24, porphobilinogen deaminase; no skin features, acute attacks with seizures, peripheral neuropathy, weakness, abdominal pain, tachycardia, hyponatremia secondary to ADH secretion |
porphyria, erythropoietic | AR, 10q25.2-q26; uroporphyrinogen III cosynthetase; early; immediate photosensitivity with burning, edema, erosions late; mutilating scarring in sun exposed areas, scarring alopecia, hypertrichosis, brown teeth, photophobia, hemolytic anemia, splenomegaly AKA Gònther’s disease |
porphyria, hepatoerythropoietic | AR, 1p34, uroporphyrinogen decarboxylase gene, homozygous form of familial PCT; onset infancy, very rare, severe photosensitivity, hemolytic anemia, splenomegaly, dark urine, hypertrichosis, hyperpigmentation, sclerodermoid change, mutilating scars |
porphyria, variegate | AD 14q32, protoporphyrinogen oxidase; bullae, erosions, scarring, milia, hypertrichosis, acute attacks precipitated by drugs, infection fever, alcohol, pregnancy |
porphyria; erythropoietic coproporphyria | Extremely rare, little is known; elevated PROTO & COPRO in red blood cells. |
porphyria; erythropoietic protoporphyria | AD, 18pter-p11.2, ferrochelatase deficiency; onset 1-4 years old. early; burning erythematous plaques in sun distribution. late; waxy thickened scarring with cholelithiasis, jaundice, anemia |
porphyria; hereditary coproporphyria | AD, 9, coproporphyrinogen oxidase gene; onset young adults, delayed photosensitivity, acute attacks similar to PCT precipitating factors, usually less severe |
postphlebitic syndrome | complications of deep venous thrombosis; chronic venous insufficiency, persistent edema, pain, purpura, increased cutaneous pigmentation, eczematoid dermatitis, pruritus, ulceration, & indurated cellulitis |
Pott’s disease | scrotal cancer in chimney sweeps from polycyclic aromatic hydrocarbons |
Preus syndrome | arched palate, cataracts, dolichocephaly, generalized hypopigmentation, growth retardation, hypochromic anemia, psychomotor retardation, small teeth, |
primary (essential) lymphedema | Milroy’s disease |
progeria | unknown inheritance; thin, atrophic skin, mottled hyperpigmentation, sparse hair, large cranium, micrognathia, osteoporosis, premature atherosclerosis, CHF, MI, short stature, short life span |
progressive cardiomyopathic lentiginosis | Moynahan’s syndrome |
progressive pigmented purpuric dermatosis | Schamberg’s disease |
prolidase deficiency | AR; aminoacidopathy,deficiency of X-Pro dipeptidase, urinary excretion of imidodipeptides; chronic skin lesions, impaired motor & cognitive development, frequent infections, bone abnormalities |
proteus syndrome | AD, sporadic; AV malformations, capillary malformation, growth & mental retardation, linear epidermal nevi, intracranial tumors, large at birth, lipomas, lymphatic-venous malformations, macrocephaly, macrodactyly, pigmented penile macules, scoliosis, soft tissue & bony hypertrophy of extremities, subcutaneous masses AKA Bannayan syndrome |
pseudo-Darier’s sign | urticarial wheal, induration, piloerection with stroking; congenital smooth muscle hamartoma |
pseudo-Hutchinson’s sign | discoloration of nail matrix; subungual hematoma |
pseudopelade of Brocq | end stage cicatricial alopecia & fibrosis from; favus, folliculitis (scarring), LE, lichen planus, sarcoidosis, scleroderma |
pseudoxanthoma elasticum | AR; basophilic degeneration of elastic tissue; flexural yellow macules & papules forming plaques, lax inelastic redundant skin, angioid streaks (retina), arterial insufficiency of lower extremities, calcified arteries, coronary insufficiency, hypertension, mitral valve prolapse, GI hemorrhage AKA nevus elasticus |
purpura annularis telangiectoides | Majocchi’s disease |
| pustulosis palmaris et plantaris | AKA Andrews pustular bacterid |
Quincke pulsation | flushing of nail beds synchronous with heartbeat; aortic regurgitation |
Quinquaud’s disease | folliculitis decalvans |
Rabson-Mendenhall syndrome | acanthosis nigricans, dental dysplasia, dystrophic nails, premature puberty |
Raeder’s syndrome | Horner’s syndrome, plus frontal/temporal headache & lacrimal sweating |
Ramsay-Hunt syndrome | herpes zoster of facial & auditory nerves, external ear with ipsilateral facial paralysis occasional deafness, tinnitus, vertigo AKA geniculate neuralgia, herpes zoster auricularis, neuralgia facialis vera, otic neuralgia, Hunt’s syndrome |
Rapp-Hodgkin syndrome | AD, AR?; absent dermatoglyphics, cleft lip/palate, coarse scalp hair, dry skin, epiphora, ectropion AKA anhidrotic ectodermal dysplasia |
Rasin’s sign | brownish pigmentation on lid margins; hyperparathyroidism AKA Jellinek’s sign |
Raynaud’s sign | acrocyanosis |
Reed’s syndrome | familial leiomyomatosis cutis et uteri |
Refsum’s disease | AR; phytanic oxidase deficiency; arrhythmias, ataxia, bony anomalies, deafness, hyperkeratosis, lenticular opacity, retinitis pigmentosa AKA heredopathia atactica polyneuritiformis |
Reiter’s syndrome | seronegative asymmetric arthropathy with one or more; cervicitis, circinate balanitis, conjunctivitis, dysentery, keratoderma blennorrhagicum, stomatitis, urethritis; males 9:1, HLA-B27 (80%) |
REM syndrome, reticular erythematous mucinosis syndrome | women; photosensitive reticulated erythematous macules & papules with dermal mucin |
Rendu-Osler-Weber syndrome | hereditary hemorrhagic telangiectasia AKA Osler-Weber-Rendu syndrome |
reticulate pigmented anomaly of the flexures | Dowling-Degos’ disease |
Reye’s syndrome | acute noninflammatory encephalopathy (lethargy, confusion, vomiting), hepatitis preceded by varicella (20-40%) & usually aspirin AKA infantile digital fibromatosis |
Richner-Hanhart syndrome | AR; 16q22, AKA tyrosinemia type II; tyrosine aminotransferase deficiency, MR, palmoplantar keratoderma, severe keratitis |
Richter’s syndrome | development of large cell lymphoma in patient with chronic lymphocytic lymphoma |
Riley-Day syndrome | AR; defective lacrimation, skin blotching, emotional instability, motor incoordination, absence of pain sensation leading to burns & bitten tongue, hyporeflexia, erythema of face & trunk, cyanosis of extremities, corneal anesthesia, hyperhidrosis, hypertension AKA familial dysautonomia |
Riley-Smith syndrome | AD; multiple lymphatic venous malformations & pseudo-papillomas, macrocephaly |
Ritter’s disease | S. aureus infection elaborating exfoliatin, leading to denuded skin AKA staphylococcal scalded skin syndrome |
Riyadh chromosome breakage syndrome | depigmentation, MR, silver hair |
Roberts phocomelia syndrome | upper limb reduction malformation, flexion contractures of knees, silver hair, IUGR, MR |
Romana’s sign | unilateral bipalpebral edema; Chagas’ disease, oculoglandular syndrome |
Rombo syndrome | AD; atrophoderma vermiculatum, BCC, hypotrichosis, milia, peripheral vasodilation with cyanosis |
Rosai-Dorfman syndrome | sinus histiocytosis with massive LAD |
| Rosenau’s depressions | nail abnormality associated with diabetes |
Rosenthal-Kloepfer syndrome | corneal leukomata, acromegaloid appearance, cutis verticis gyrata |
Ross syndrome | progressive segmental anhidrosis with tonic pupils, absent DTRs |
Roth’s spots | conjunctival petechiae; subacute bacterial endocarditis |
Rothmann-Makai syndrome | lipogranulomatosis subcutanea; idiopathic lobular panniculitis with fat cell necrosis, lipophagic granuloma, cysts |
Rothmund-Thomson syndrome | AR, 8; mostly females (some have C1q deficiency); atrophic hyperpigmented reticulated telangiectatic cutaneous plaques, alopecia, bone defects, cancer, dental dysplasia, hypogonadism, hypoparathyroidism, nail dystrophy, photosensitivity AKA poikiloderma congenitale |
Rothschild’s sign | loss of hair from lateral third of eyebrows; hypothyroidism (non-specific) |
Rowell’s syndrome | erythema multiforme-like lesions occurring in patients with SLE & La/SS-B autoantibodies |
Rozychi’s syndrome | achalasia, congenital deafness, leukoderma, muscle wasting |
rubber man syndrome | Ehlers-Danlos syndrome |
Rubinstein-Taybi syndrome, Rubinstein’s syndrome | mental & motor retardation, broad thumbs & great toe, keloid formation, short stature, characteristic facies, high palate, beaked nose, large foramen magnum, vertebral abnormalities |
Rud’s syndrome | AR (?); associated with recessive X-linked ichthyosis, hypogonadism, MR, obesity, retinitis pigmentosa [may be the same disease as X-linked recessive ichthyosis] |
Ruffini’s corpuscle | rare, subcutaneous acral skin receptor; unknown function |
runting syndrome | GVH with diarrhea, dermatitis, HSM, hemolytic anemia, pancytopenia |
Russell’s sign | callous (or calluses) on the dorsum of dominant hand; purging eating disorder |
Russell-Silversyndrome., Russell’s syndrome | café-au-lait spots, incurved fifth fingers, lateral asymmetry, low birth weight, precocious puberty, short stature, syndactyly, triangular-shaped face, turned down corners of mouth |
Ruvalcaba-Myhre-Smith syndrome | bony & craniofacial abnormalities, genital macules, intestinal polyposis |

