The word "phatnorrhagia" has a complex spelling, which can be explained using IPA phonetic transcription. It is pronounced as /fæˌtɛnəˈreɪdʒə/, with stress on the second syllable. The "ph" at the beginning of the word is pronounced as /f/ and the "tn" sound is pronounced as /tən/. The "rr" in the middle of the word represents a prolonged, rolled "r" sound. Overall, the spelling of "phatnorrhagia" follows some common patterns in medical terminology, such as combining Greek roots with Latin suffixes.
Alveolar hemorrhage.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.