NF1 and gastric adenocarcinoma: Some of these transcription factors are also tissue specific, for example, the SP1 expressed in adenocarcinomas of the stomach [33], CP1 highly expressed in liver, kidney, and intestine but weakly expressed in adrenals and in lactating mammary glands [34, 35], and NF-1 detected in brain, peripheral nerve, lung, colon, and muscle [36], and so forth.