Mars gets debilitated when it is placed in the sign of Cancer, which means Mars becomes very weak by virtue of its placement in the sign of Cancer. Accordingly debilitated Mars in the eighth house of a horoscope may not produce significant positive or negative results for the native, unless it is supported by the other positive or negative planets in his horoscope. The type of results given by such debilitated Mars whether they are positive or negative; depend on the working nature of Mars and on the overall tone of the horoscope in question.
When benefic in nature, retrograde debilitated Mars in the eighth house of a horoscope in the sign of Cancer can bless the native with good results related to marriage, profession, fame, authority and many other types of good results depending on the overall tone of his horoscope. Such benefic retrograde debilitated Mars can bless some natives with many types of positive results through their marriages, when present in harmony with marriage approving planets in the horoscopes of these natives. Benefic retrograde debilitated Mars in the eighth house in the sign of Cancer can bless some natives with husbands or wives who may belong to foreign countries and these natives may settle in the countries of their life partners on the basis of their marriages. For example, if benefic retrograde debilitated Mars is placed in the eighth house of a horoscope in the sign of Cancer along with benefic Venus, benefic Mercury is placed in the ninth house of this horoscope in the sign of Leo and benefic Sun is also placed in the ninth house of this horoscope along with benefic Mercury, the native may experience such marriage. The native benefitting from benefic retrograde debilitated Mars in the eighth house in the sign of Cancer and other benefic planets may get married to a woman who may be the citizen of a foreign country and he may settle in her country on the basis of his marriage.
Benefic retrograde debilitated Mars in the eighth house in the sign of Cancer can also bless the natives under its impact with success, authority and fame through many types of professions, when boosted by profession favoring planets in their horoscopes. Such benefic retrograde debilitated Mars can bend some natives towards the field of hospitality due to which these natives may engage in professions related to this field and they may achieve success as professionals dealing in event management industry, shipping cruise industry, travel industry, airline industry, hotel industry and other such professions. For example, if benefic retrograde debilitated Mars is placed in the eighth house of a horoscope in the sign of Cancer, benefic Sun is placed in the tenth house of this horoscope in the sign of Virgo, benefic Mercury is placed in the eleventh house of this horoscope in the sign of Libra, benefic Venus is placed in the twelfth house of this horoscope in the sign of Scorpio and benefic Jupiter is placed in the fourth house of this horoscope in the sign of Pisces, the native may engage in shipping cruise industry. The native benefitting from benefic retrograde debilitated Mars in the eighth house in the sign of Cancer and other benefic planets may get blessed with a well paying job in a cruise liner and he may earn good amount of money and success through this field of profession.
At the same time, if benefic retrograde Saturn is placed in the fourth house of this horoscope in the sign of Cancer along with benefic Jupiter; and benefic exalted Moon is placed in the sixth house of this horoscope in the sign of Taurus when all other planets are placed in the already mentioned houses of this horoscope, the equation may become much better. The native benefitting from benefic retrograde debilitated Mars in the eighth house in the sign of Cancer and other benefic planets may become the owner of a cruise liner and he may witness very good results through this field of profession. The collective influence of such benefic retrograde debilitated Mars and other benefic planets can bless this native with very good amount of financial incomes through such cruise liner and he may also enjoy many other types of benefits by virtue of this profession. Apart from this, benefic retrograde debilitated Mars in the eighth house in the sign of Cancer can bless the natives with favorable results through many other fields of profession, depending on the type of positive planets which support it in the horoscopes of these natives.
On the other hand, malefic retrograde debilitated Mars in the eighth house of a horoscope in the sign of Cancer can trouble the native with problems related to marriage, profession, health and many other types of problems depending on the overall tone of his horoscope. Such malefic retrograde debilitated Mars can target the professions of some natives under its impact; and it can create many types of problems related to this field. Malefic retrograde debilitated Mars in the eighth house in the sign of Cancer can make some natives remain jobless many times in their lives and this problem may aggravate with the addition of other negative planets to the horoscopes of these natives. In an extreme case of this type when supported by other malefic planets, malefic retrograde debilitated Mars in the eighth house of a horoscope in the sign of Cancer can keep the native away from a permanent profession throughout his life, and he may only get temporary jobs of short durations, from time to time.