Panhypopituitarism, X-Linked, also known as phpx, is related to hypothyroidism due to deficient transcription factors involved in pituitary development or function and isolated growth hormone deficiency, type ii. An important gene associated with Panhypopituitarism, X-Linked is SOX3 (SRY-Box Transcription Factor 3). Affiliated tissues include pituitary, and related phenotypes are delayed skeletal maturation and growth delay