Haim-Munk syndrome

Haim-Munk syndrome (HMS), also known as palmoplantar keratoderma with periodontopathy and onychogryphosis, is an extremely rare autosomal recessive genodermatosis caused by mutations in the CTSC gene (cathepsin C), which encodes dipeptidyl peptidase I. This condition was first described in a consanguineous Jewish Cochin family from India. Haim-Munk syndrome is closely related to Papillon-Lefèvre syndrome, as both conditions arise from mutations in the same gene, though HMS has additional distinguishing features. The syndrome primarily affects the skin, nails, gums, and skeletal system. Key clinical features include palmoplantar keratoderma (thickened skin on the palms and soles) that typically appears in early childhood, severe early-onset periodontitis leading to premature loss of both deciduous and permanent teeth, onychogryphosis (thickened, curved nails resembling claws), arachnodactyly (unusually long, slender fingers), and acro-osteolysis (resorption of the distal phalanges). Patients may also develop recurrent pyogenic skin infections and pes planus (flat feet). The periodontitis is aggressive and often results in complete tooth loss by adolescence or early adulthood if untreated. There is no cure for Haim-Munk syndrome, and management is symptomatic and supportive. Treatment typically involves dermatological care with emollients and keratolytic agents for the palmoplantar keratoderma, aggressive periodontal treatment including dental hygiene measures and antibiotics to slow tooth loss, and orthopedic monitoring for skeletal abnormalities. Oral retinoids such as acitretin have been used with some benefit for the skin manifestations. A multidisciplinary approach involving dermatologists, periodontists, and orthopedic specialists is recommended for optimal patient care.

Common questions about Haim-Munk syndrome