RT Journal A1 Kappy M, Kummer M, Tyson R, Caldwell S, Kleman G T1 PAthological case of the month JF Archives of Pediatrics & Adolescent Medicine JO Archives of Pediatrics & Adolescent Medicine YR 1999 FD April 1 VO 153 IS 4 SP 427 OP 428 DO UL http://dx.doi.org/ AB THE PATIENT was a 9-month-old boy who had abnormal findings on an initial newborn screen for hypothyroidism, but a second test showed a normal circulating free thyroxine concentration, with serum thyroid-stimulating hormone concentrations that fluctuated between normal and slightly elevated. He was given replacement thyroid hormone to treat his compensated primary hypothyroidism. During the first few months of life, purplish, firm, nodular lesions were noticed on his abdomen and extremities (Figure 1), with the largest on the wrist and the knee (Figure 2). A biopsy specimen of one of the lesions on his abdomen had the microscopic appearance shown in Figure 3.