The Roman medical encyclopedist Celsus (c. 30 BC–38 AD) described the four cardinal signs of acute inflammation as tumor, dolor, calor, and rubor (swelling, pain, increased heat, and redness). (His treatise, De Medicina, was the first medical book printed in 1478 following the invention of the movable-type printing press.) In contemporary English, the word tumor is often used as a synonym for a cystic (liquid-filled) growth or solid neoplasm (cancerous or non-cancerous), with other forms of swelling often referred to as "swellings".Related terms occur commonly in the medical literature, where the nouns tumefaction and tumescence (derived from the adjective tumescent) are current medical terms for non-neoplastic swelling. This type of swelling is most often caused by inflammation caused by trauma, infection, and other factors. Tumors may be caused by conditions other than an overgrowth of neoplastic cells, however. Cysts (such as sebaceous cysts) are also referred to as tumors, even though they have no neoplastic cells. This is standard in medical-billing terminology (especially when billing for a growth whose pathology has yet to be determined). See also
Somatic evolution in cancer
List of biological development disorders
Epidemiology of cancer
Pleomorphism

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Parents have the ability to maintain language delay by offering the child a non-verbal environment or one where their communication may not be challenged. Intervention programs and strategies are found to be beneficial to children with a specific language impairments. Research has found that the management strategies put to use are influenced by the child and the important participation of the parents. Parents are likely to follow the lead of the childs language development. One approach for intervening is naturalistic intervention. The child is in a natural environment where the communication is more responsive, rather than being more direct. See also
References
Further reading
External links
Speech Therapy for Down Syndrome
Different Issues in Speech and Language Development - American Speech-Language-Hearing Association (ASHA)
Delay in Speech and Language - KidsHealth
Early Identification of Speech -Language Delays and Disorders
Speech and Language Delays and Disorders - University of Michigan Health System
CHAPTER III - Assessment Methods for Young Children With Communications Disorders
Statistics on Voice, Speech, and Language - National Institute of Deafness and Other Communication Disorders