RESUMO
INTRODUCTION: Sheehan's syndrome (SS) occurs due to ischemic pituitary necrosis as a result of severe postpartum hemorrhage (PPH). AIMS AND OBJECTIVES: The aim of the present study was to review the presenting features of SS at diagnosis. MATERIALS AND METHODS: We retrospectively reviewed 18 cases of SS at diagnosis. Presenting clinical features, laboratory data, pituitary hormone deficiencies, and magnetic resonance imaging (MRI) of the sella were analyzed. RESULTS: Age ranged from 28-71 years with a mean age of 47 ± 14.44 years. Time to diagnosis of SS was 6-33 years with a mean of 15.35 ± 6.74 years. Four (22.2%) patients were referred from emergency for hyponatremia, one each (5.6%) for hypotension, hypoglycemia, and vomiting. Three (16.7%) patients presented with asthenia and weight loss, two (11.1%) with slightly raised thyroid stimulating hormone (TSH). Only six (33.3%) presented with classic features of amenorrhea. None presented with isolated lactational failure or apoplexy after PPH. Seventeen (94.4%) patients had lactational failure; thirteen (72.2%) did not menstruate following last delivery. Lactotroph and gonadotroph failure were present in all at diagnosis but corticotrophs preservation was documented in three (16.7%) and thyrotroph in two (11.1%) patients. Twelve (66.7%) patients had empty sella while six (33.3%) had partial empty sella on MRI. CONCLUSION: SS has variable features at diagnosis and may present to different specialties. The clinical features of hypopituitarism are often subtle, leading to delay in diagnosis. History of PPH, lactational failure and cessation of menses are important clues. Thyrotroph, corticotroph axis may be preserved in some SS patients.