A 72-year-old female patient was admitted to our hospital with a rapidly growing left eyelid mass. Other ocular findings were normal. Excision biopsy and a cytological study were performed. Histopathology of the excised tissue showed malignant cells in extracellular lumens and glands with prominent micronuclei and mitotic figures. The tissue was also strongly positive for cytokeratin. As a result, of these fingings primary eyelid hidradenocarcinoma was diagnosed. This case demonstrates that hidradenocarcinoma should be considered in the differential diagnosis of primary eyelid tumors.

The length of solar cycle 23 has been prolonged up to about 13 years. Many studies have speculated that the solar cycle 23/24 minimum will indicate the onset of a grand minimum of solar activity, such as the Maunder Minimum. We check the trends of solar (sunspot number, solar magnetic fields, total solar irradiance, solar radio flux, and frequency of solar X-ray flare), interplanetary (interplanetary magnetic field, solar wind and galactic cosmic ray intensity), and geomagnetic (Ap index) parameters (SIG parameters) during solar cycles 21-24. Most SIG parameters during the period of the solar cycle 23/24 minimum have remarkably low values. Since the 1970s, the space environment has been monitored by ground observatories and satellites. Such prevalently low values of SIG parameters have never been seen. We suggest that these unprecedented conditions of SIG parameters originate from the weakened solar magnetic fields. Meanwhile, the deep 23/24 solar cycle minimum might be the portent of a grand minimum in which the global mean temperature of the lower atmosphere is as low as in the period of Dalton or Maunder minimum.