ARC syndrome is not so rare.
D000015:Abnormalities, Multiple / Q000453:epidemiology* / Q000235:genetics; D000141:Acidosis, Renal Tubular / Q000453:epidemiology* / Q000235:genetics; D001176:Arthrogryposis / Q000453:epidemiology* / Q000235:genetics; D001792:Blood Platelets / Q000473:pathology; D002779:Cholestasis / Q000453:epidemiology* / Q000235:genetics; D003967:Diarrhea / Q000453:epidemiology / Q000235:genetics; D005183:Failure to Thrive / Q000453:epidemiology / Q000235:genetics; D005334:Fever / Q000453:epidemiology / Q000235:genetics; D006801:Humans; D007223:Infant; D015995:Prevalence; D013577:Syndrome; D006113:United Kingdom / Q000453:epidemiology