random , nonselected tissue specimens from 99 japanese-20 cylindrically cut nasal blocks removed during autopsy ( a.c. , autopsy cases ) and 79 cases removed during surgery , consisting of 32 chronic sinusitis cases ( c.s . ) and 47 nasal polyp cases ( n.p . ) -were examined histopathologically and electronmicroscopically with respect to distribution and frequency of melanocytes in the nasal cavity and paranasal sinus .
C0149516
chronic sinusitis
C0027423
nasal cavity