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JMP syndrome
Other Resources UpToDate PubMed

JMP syndrome

Contributors: Kayla Reifel BA, Susan Burgin MD
Other Resources UpToDate PubMed


JMP syndrome is a rare autosomal recessive syndrome, classified as a proteosome-associated autoinflammatory syndrome (PRAAS), with joint contractures, muscular atrophy, microcytic anemia, and panniculitis-associated lipodystrophy. JMP is thought to be due to a mutation in the PSMB8 gene, affecting major histocompatibility complex (MHC) class I antigen processing. The few documented cases include 3 patients from Japan, 2 of which were born from consanguineous parents, 1 patient from Mexico, and 1 patient from Portugal.

Symptoms and signs present in infancy to adolescence with erythematous macules, papules, and panniculitic nodules, muscular atrophy, and severe panniculitis-induced lipodystrophy affecting the face, arms, and thorax. The muscular atrophy and lipodystrophy then progress to involve the abdomen and lower extremities. Other features documented across several case reports include microcytic anemia, periodic fever, basal ganglia calcification, hypergammaglobulinemia, hepatosplenomegaly, and cognitive delay. Case reports document patients living into their 40s, but no data has been reported on average life expectancy.


M04.8 – Other autoinflammatory syndromes

702449004 – Autoinflammation, lipodystrophy and dermatosis syndrome

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Diagnostic Pearls

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Differential Diagnosis & Pitfalls

  • Erythema nodosum
  • Juvenile dermatomyositis
  • CANDLE syndrome
  • Nakajo-Nishimura syndrome (Japanese autoinflammatory syndrome with lipodystrophy)
  • Congenital generalized lipodystrophy
  • Barraquer-Simons syndrome
  • Progeria
  • Restrictive dermopathy
  • Progeria-associated arthropathy (see Progeria)
  • Acute febrile neutrophilic dermatosis
  • Cryopyrin-associated periodic syndromes (CAPS)
  • Cryopyrin-associated periodic syndromes (NOMID)
  • Familial partial lipodystrophy
  • Leukemia cutis
  • Infectious disease
  • Werner syndrome

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Last Reviewed:07/08/2023
Last Updated:07/23/2023
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JMP syndrome
A medical illustration showing key findings of JMP syndrome
Copyright © 2024 VisualDx®. All rights reserved.