Case report of H-syndrome with a review from a rheumatological perspective.

A woman in her 20s, symptomatic since the age of 4 with short stature, hearing loss, skin hyperpigmentation and induration over the medial aspect of the thigh, hypertrichosis, histiocytes on biopsy, lymphadenopathy, dilated scleral vessels, pancreatic exocrine deficiency, pericardial thickening, swelling of the eyelids and resistant retroperitoneal fibrosis. Whole-genome sequencing showed a mutation in SLC29A3, confirming 'H'-syndrome. She is on steroids and methotrexate. This case highlights the rheumatological mimics of this rare disorder.