U.S. flag

An official website of the United States government

Format

Send to:

Choose Destination

Autosomal recessive palmoplantar keratoderma and congenital alopecia(CASS; PPKCA2)

MedGen UID:
347851
Concept ID:
C1859316
Disease or Syndrome
Synonyms: Cataract, alopecia, sclerodactyly; Cataract, alopecia, sclerodactyly syndrome; PALMOPLANTAR KERATODERMA AND CONGENITAL ALOPECIA 2; PPKCA, WALLIS TYPE
Modes of inheritance:
Autosomal recessive inheritance
MedGen UID:
141025
Concept ID:
C0441748
Intellectual Product
Source: Orphanet
A mode of inheritance that is observed for traits related to a gene encoded on one of the autosomes (i.e., the human chromosomes 1-22) in which a trait manifests in individuals with two pathogenic alleles, either homozygotes (two copies of the same mutant allele) or compound heterozygotes (whereby each copy of a gene has a distinct mutant allele).
 
Monarch Initiative: MONDO:0008923
OMIM®: 212360
Orphanet: ORPHA1366

Definition

Palmoplantar keratoderma and congenital alopecia-2 (PPKCA2) is an autosomal recessive disorder characterized by congenital alopecia and progressive hyperkeratosis resulting in sclerodactyly, severe contractures and tapering of the digits, and pseudoainhum formation. Nail changes occur in some patients (Castori et al., 2010). Also see PPKCA1 (104100), a less severe, autosomal dominant disorder. [from OMIM]

Clinical features

From HPO
Palmoplantar keratosis
MedGen UID:
44017
Concept ID:
C0022596
Disease or Syndrome
Abnormal thickening of the skin localized to the palm of the hand and the sole of the foot.
Camptodactyly of finger
MedGen UID:
98041
Concept ID:
C0409348
Finding
The distal interphalangeal joint and/or the proximal interphalangeal joint of the fingers cannot be extended to 180 degrees by either active or passive extension.
Sclerodactyly
MedGen UID:
472893
Concept ID:
C0150988
Disease or Syndrome
Localized thickening and tightness of the skin of the fingers or toes.
Dry skin
MedGen UID:
56250
Concept ID:
C0151908
Sign or Symptom
Skin characterized by the lack of natural or normal moisture.
Nail dystrophy
MedGen UID:
66368
Concept ID:
C0221260
Disease or Syndrome
Onychodystrophy (nail dystrophy) refers to nail changes apart from changes of the color (nail dyschromia) and involves partial or complete disruption of the various keratinous layers of the nail plate.
Facial erythema
MedGen UID:
65986
Concept ID:
C0239488
Finding
Redness of the skin of the face, caused by hyperemia of the capillaries in the lower layers of the skin.
Keratosis pilaris
MedGen UID:
82664
Concept ID:
C0263383
Disease or Syndrome
An anomaly of the hair follicles of the skin that typically presents as small, rough, brown folliculocentric papules distributed over characteristic areas of the skin, particularly the outer-upper arms and thighs.
Alopecia totalis
MedGen UID:
75525
Concept ID:
C0263504
Disease or Syndrome
Loss of all scalp hair.
Hyperkeratosis
MedGen UID:
209030
Concept ID:
C0870082
Disease or Syndrome
Hyperkeratosis is thickening of the outer layer of the skin, the stratum corneum, which is composed of large, polyhedral, plate-like envelopes filled with keratin which are the dead cells that have migrated up from the stratum granulosum.
Nail dysplasia
MedGen UID:
331737
Concept ID:
C1834405
Congenital Abnormality
The presence of developmental dysplasia of the nail.
Amniotic constriction ring
MedGen UID:
315953
Concept ID:
C1527388
Congenital Abnormality
Annular constrictions around the digits, limbs, or trunk, occurring congenitally (sometimes causing intrauterine autoamputation) and also associated with a wide variety of disorders. Constrictive amniotic bands are the result of primary amniotic rupture, which can lead to entanglement of fetal tissue (especially limbs) in fibrous amniotic strands.
Developmental cataract
MedGen UID:
3202
Concept ID:
C0009691
Congenital Abnormality
A cataract that occurs congenitally as the result of a developmental defect, in contrast to the majority of cataracts that occur in adulthood as the result of degenerative changes of the lens.

Term Hierarchy

CClinical test,  RResearch test,  OOMIM,  GGeneReviews,  VClinVar  
  • CROGVAutosomal recessive palmoplantar keratoderma and congenital alopecia
Follow this link to review classifications for Autosomal recessive palmoplantar keratoderma and congenital alopecia in Orphanet.

Recent clinical studies

Diagnosis

Zhou S, Jiang X, Zhu Y, Yang J, Yuan C, Chen M, Zhou Q, Lin Z, Li M
Exp Dermatol 2023 May;32(5):699-706. Epub 2023 Mar 6 doi: 10.1111/exd.14774. PMID: 36811447
Castori M, Morlino S, Sana ME, Paradisi M, Tadini G, Angioni A, Malacarne M, Grammatico P, Iascone M, Forzano F
Clin Exp Dermatol 2016 Aug;41(6):632-5. Epub 2016 Jun 24 doi: 10.1111/ced.12857. PMID: 27339777

Supplemental Content

Recent activity

Your browsing activity is empty.

Activity recording is turned off.

Turn recording back on

See more...