DAO 47:73-79 (2001)  -  doi:10.3354/dao047073

Structural study of a possible neoplasia detected in Mytilus galloprovincialis collected from the Ria of Vigo (NW Spain)

A. Alonso1, P. Suarez2, C. Alvarez1, F. San Juan2, P. Molist1,*

1Department of Functional Biology and Health Sciences and
2Department of Biochemistry, Genetics and Immunology, University of Vigo, Lagoas-Marcosende, 36200 Vigo, Spain
*Corresponding author. E-mail:

ABSTRACT: Several specimens of Mytilus galloprovincialis, collected in the Ria of Vigo over a non-consecutive 2 yr period (1993 to 1994 and 1996 to 1997), presented a possible gonadal neoplasm, entailing morphologically abnormal germinal cells distributed throughout the follicle and invading the adjacent storage tissue. In some cases, affected cells were noted in gonoducts and in haemic sinusoids. Prevalence of this anomaly in the samples was 6%, and all affected individuals were found between April and June. During the rest of the year, individuals presented normal gonadal tissue.

KEY WORDS: Gonadal neoplasm · Histopathology · Structural study · Mytilus galloprovincialis

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