Haim-Munk syndrome (HMS) is characterized by palmoplantar hyperkeratosis, severe early-onset periodontitis, onychogryposis, pes planus, arachnodactyly and acroosteolysis. The disease is Monarch Disease Ontology entry MONDO_0009491 (Haim-Munk syndrome). Also known as: keratosis palmoplantaris-periodontopathia-onychogryposis syndrome, palmoplantar hyperkeratosis-periodontopathia-onychogryposis syndrome, palmoplantar keratoderma-periodontopathia-onychogryposis syndrome.